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Peatscapes: Monitoring of Hydrology and
       Water Quality at Geltsdale and Priorsdale
                      Report of Phase 1: Nov 2007 – Mar 2009


Dr Jennine Jonczyk, Dr Mark Wilkinson, Dr David Rimmer and Dr Paul Quinn
Some of the features in the catchment

                                                                                         Pilot pond
                                       Overland flow following gradient of slope                              Leaky
                                                                                         stream gauge
                                                                                                              wooden
                                                                                                              barrier
                                                                                   PILOT POND
                                         STREAM                                                                    Overflow

                                         SPILL
                                                                           Woodland
                                                                                                              Leakage
                                                       R1 stream
                                      Diversion        gauge
                                      structure

                                                                                                    Belford Burn
                                                                   Roughly 200m




     1.35km                          1.15km                                             1.85km


R1                       R2                                   R3                                                        BEL

                              Upper Belford Burn
 “Pilot pond”
                                                                                        Features 1 to 3
Some of the features in the catchment




     1.35km                          1.15km             1.85km


R1                       R2                        R3                     BEL

                              Upper Belford Burn
 “Pilot pond”
                                                        Features 1 to 3
Some of the features in the catchment




     1.35km                          1.15km             1.85km


R1                       R2                        R3                     BEL

                              Upper Belford Burn
 “Pilot pond”
                                                        Features 1 to 3
…but that was last week!

Lower Lady’s well feature
Outline




1. Questions to answer

2. Hydrology

3. WQ

4. Peatscapes II
Questions to answer

How does grip blocking effect :-

1. Water table
2. Water colour (& Dissolved Organic Carbon; DOC)
3. Suspended sediment

HOW are we investigating this?

1. (Water table) using pressure transducers in the peat

2. (Colour) grab samples taken from grips and downstream pts and
    measuring DOC and absorbance in lab.

3. (SS) Filtering grab sample
Working Hypothesis

     ARE grips like open drainage ditches?

     What happens when it rains?




Q

WT
Blocked Grip


                                                                     Generic
                                                  Blocked Grip

                                                                   experimental
                                                  Unblocked Grip    Lay-out


                                                  Unblocked Grip


Dip-wells with pressure transducers upslope and
downslope of grips

Dip-wells at mid-point between grips

Water quality sample from grips.
Relative water level in grips (cms)
                   25
                     /0
                        9/
                           20
                             07
                                    00




                                                0
                                                                10
                                                                             20
                                                                                          30
                                                                                                       40
                                                                                                                50
                                                                                                                             60
                                                                                                                                         70
                                         :0
                                           0

                   14
                      /1
                         1/
                            20
                               07
                                    00
                                         :0
                                            0

                   03
                      /0
                         1/
                            20
                              08
                                    00
                                         :0
                                            0

                   22
                     /0
                        2/




Grip 1
                           20
                             08
                                    00
                                       :   00


                   12
                      /0
                         4/
                            20
                               08
                                    00
                                         :0
                                            0




Grip 2 (Blocked)
                   01
                     /0
                        6/
                           20
                             08
                                    00
                                         :0
                                           0


rainfall           21
                      /0
                         7/
                            20
                              08
                                                                                                                                                Geltsdale Hydrology: Grips




                                    00
                                         :0
                                            0

                   09
                     /0
                        9/
                           20
                             08
                                    00
                                       :   00
                                                                                                        8.00
                                                                                                               6.00
                                                                                                                      4.00
                                                                                                                                  2.00
                                                                                                                                         0.00




                                                20.00
                                                        18.00
                                                                     16.00
                                                                             14.00
                                                                                       12.00
                                                                                               10.00




                                                                                     15-min rainfall (mm)
Geltsdale Hydrology: Water table

                                          25/09/2007     14/11/2007    03/01/2008     22/02/2008   12/04/2008      01/06/2008   21/07/2008      09/09/2008
                                            00:00          00:00          00:00         00:00        00:00            00:00       00:00            00:00
                                             0




                                            -50
Depth of water table from surface (cms)




                                           -100




                                           -150




                                           -200




                                           -250


                                                  Downslope of grip1          Upslope of grip 1         Downslope of grip 2          Upslope of grip 2
09
                         /   03                                          Grip water level (cm)
                               /2
                                    00
                                      8
                      09                  00
                        /0                   :
                                                                    10
                                                                          15
                                                                                 20
                                                                                      25
                                                                                           30
                                                                                                 35
                                                                                                          40
                                                                                                               45
                                                                                                                    50




                                          -5
                                                      0
                                                           5
                          3/                     00
                             2      00
                                      8
                      10            16
                         /0            :1
                           3/            5
                              20
                                 08
                      11            08
                        /0             :3
                           3/            0
                              20


grip 3
                                 08
                      11            00
                        /0             :4
                           3/            5
                              20
                                 08
                      12            17
                         /0            :0
                           3/            0
                              20
                                 08
                      13            09
                         /0            :1
                           3/            5
                              20
                                 08
                      13            01
                         /0            :3
                                                                                                                         E.g. Data anomalies




                           3/            0
                              20
                                 08
grip 2 (blocked)




                      14            17
                         /0            :4
                           3/            5
                              20
                                 08
                      15            10
                        /0             :0
                           3/            0
                              20
                                 08
                      15            02
                        /0             :1
                           3/            5
                              20
                                 08
                      16            18
                         /0            :3
                           3/            0
                              20
                                 08
                      17            10
                         /0            :4
                           3/            5
                              20
                                 08
Temp - 850mAoD (°C)




                                    03
                                       :0
                                         0
                                                                                       0
                                                                                            1
                                                                                                      2
                                                                                                               3
                                                                                                                    4




                                          -5
                                                      -4
                                                               -3
                                                                         -2
                                                                                 -1




                                                                              Temperature (°C)
02
                     /0
                        5   /2                                        Relative water level in grips (cms)
                                 00
                                      8
                                          00
                                               :0




                                                                              10
                                                                                           15
                                                                                                    20
                                                                                                            25
                                                                                                                       30
                                                                                                                                  35
                                                                                                                                         40




                                                        0
                                                                 5
                                                    0


                   07
                     /0
                        5   /2
                                 00
                                      8
                                          00
                                               :0
                                                    0


                   12
                     /0
                        5   /2
                                 00
                                      8
                                          00
                                               :0
                                                    0




Grip 1
                   17
                     /0
                          5/
                               20
                                    08
                                          00
                                             :   00


                   22
                     /0
                          5/
                               20
                                    08




Grip 2 (Blocked)
                                          00
                                             :   00


                   27
                     /0
                          5/
                               20
                                    08
                                          00
                                               :0
rainfall
                                                    0


                   01
                     /0
                          6/
                               20
                                    08
                                          00
                                               :0
                                                    0
                                                                                                           8.0
                                                                                                                 6.0
                                                                                                                            4.0
                                                                                                                                   2.0
                                                                                                                                         0.0




                                                        20.0
                                                               18.0
                                                                       16.0
                                                                                   14.0
                                                                                             12.0
                                                                                                    10.0
                                                                                                                                               Geltsdale Hydrology:- Response in grips in May 2008




                                                                                          15 min rainfall (mm)
Geltsdale Hydrology: Water table response in May 2009
                       02/05/2008 00:00 07/05/2008 00:00 12/05/2008 00:00 17/05/2008 00:00 22/05/2008 00:00 27/05/2008 00:00 01/06/2008 00:00
                                            0

                                           -10
Depth of water table from surface (cms)




                                           -20

                                           -30

                                           -40

                                           -50

                                           -60

                                           -70

                                           -80

                                           -90

                                          -100


                                                 Downslope of grip 1   Upslope of grip 1   Downslope of grip 2   Upslope of grip 2
30
                     /0                                   Relative water level in grips (cms)
                        8/
                           20
                             08
                                    00
                                      :0




                                                0
                                                          10
                                                                   20
                                                                             30
                                                                                      40
                                                                                                50
                                                                                                         60
                                        0
                   01
                     /0
                          9/
                             20
                               08
                                    00
                                      :0
                                        0
                   03
                     /0
                       9/
                          20
                            08
                                    00
                                       :   00

                   05
                     /0
                       9/
                          20




Grip 1
                            08
                                    00
                                       :   00

                   07
                     /0
                       9/
                         20
                           08
                                    00
                                       :   00

                   09
                     /0




Grip 2 (Blocked)
                       9/
                         20
                           08
                                    00
                                       :   00

                   11
                     /0
                       9/
                          20
                            08
Rainfall



                                    00
                                       :   00

                   13
                     /0
                       9/
                          20
                            08
                                    00
                                       :   00
                                                                                                              Geltsdale Hydrology: Response in grips during Sept 2008




                                                                                  8
                                                                                       6
                                                                                            4
                                                                                                     2
                                                                                                         0




                                                20
                                                     18
                                                            16
                                                                 14
                                                                        12
                                                                             10
Geltsdale Hydrology:- response in water table during
                                                            Sept 08 storm

                                          30/08/2008    01/09/2008    03/09/2008   05/09/2008     07/09/2008   09/09/2008   11/09/2008     13/09/2008
                                            00:00         00:00          00:00        00:00         00:00         00:00        00:00          00:00
                                            0
Depth of water table from surface (cms)




                                          -10


                                          -20


                                          -30


                                          -40


                                          -50


                                          -60


                                          -70


                                          -80


                                                       Downslope of grip 1    Upslope of grip 1     Downslope of grip 2     Upslope of grip 2
Observations in unblocked grips


No response in water table position - no matter where they are
Flashy spiky flow in grips.
Observations in blocked grip


Nice and smooth – less spiky and less flashy response in grip
Water table position is again not responding to flow
Working Hypothesis

• Grips and Pipes are ‘off’ even though there may be a water table present

• Small additions of percolating rain – connect all the pipes and grip together

• What comes in goes out

• When rain stops, flow stops and pipes empty

                                                    Active flow paths
                                                    in the acrotelm (top) layer
                  pipes

                                                       grip
                  WT
Water Quality
Colour

• Water colour is caused by the presence of
  dissolved organic compounds –
  predominantly humic and fulvic acids, which
  are the products of decomposition from
  organic soils.

• Current EU Drinking water standard for
  Water colour is :- 20 Hazen

• Colour of River Tees is: 60-120 Hazen
Colour

Geltsdale            Colour    (Hazen)
Pre-blocking         Unblocked Blocked All
                                       Grips
          23/11/2007    165      147    156bc     Priorsdale
          15/01/2008    105      164    135bc                  Colour (Hazen)
                                                               Blocked Unblocked All
         07/02/2008    48        51       50de                                   grips
         25/03/2008    34        35       35e     27/11/2007     77.0    77.4    77.2abc
         01/05/2008    34       118      76cde    15/01/2008     39.0    41.7     40.4bc
         05/06/2008    185      216      200ab    07/02/2008     10.9    20.7      15.8c
         01/07/2008    269      244      257a     25/03/2008    frozen     *         *
         02/10/2008    146      149     148bcd    06/06/2008    218.5    83.8     151.2a
         13/11/2008    168      125      146bc    01/07/2008    154.4    117.7   136.1ab
         27/02/2009    97       139     118bcde   27/02/2009    123.5    57.0    90.3abc
         25/03/2009    109       95     102cde    25/03/2009     62.5    29.0     45.8bc
Mean since blocking    121      122       122     Mean           98.0    61.1      79.5
DOC
• Dissolved Organic carbon is derived from organic matter
and has a strong correlation with WATER COLOUR.

•DOC is an important component of the carbon cycle in
streams and a primary food source.

•Evidence for upward trend in DOC concentrations related
to atmospheric deposition changes. (Worrall et al, 2004;
Evans et al, 2006)
DOC
Geltsdale         DOC       (mg/l)
Pre-blocking      Unblocked Blocked All
                                    grips
       23/11/2007   35.1      32.9   34.0bc
       15/01/2008   24.0      25.3  24.6cde   Priorsdale DOC     (mg/l)
Post-blocking                                            Blocked Unblocked All
       07/02/2008   17.8      18.0   17.9e                                 grips
       25/03/2008   15.6      17.3   16.5e    27/11/2007   21.6     21.8    21.7ab
       01/05/2008   15.6      27.7   21.7de   15/01/2008   15.6     16.2    15.9ab
       05/06/2008   38.0      42.2   40.1ab   07/02/2008   12.4     13.2    12.8b
       01/07/2008   51.1      46.8   49.0a    25/03/2008
       02/10/2008   32.4      32.7   32.5bc   06/06/2008   43.8     22.8    33.3a
       13/11/2008   36.6      29.3   33.0bc
                                              01/07/2008   26.0     21.8    23.9ab
       27/02/2009   24.3      31.5   27.9cd
                                              27/02/2009   29.0     18.5    23.8ab
       25/03/2009   26.5      24.2  25.4cde
Mean since                                    25/03/2009   20.0     14.5    17.3b
blocking            28.7      30.0    29.3    Mean         24.1     18.4     21.2
E4/E6 ratio
• Ratio of humic acid(E4) and fulvic acid(E6)

• Used to represent the degree of humification in peat
Humification is decomposition of vegetation…..

• Ratio below 5 classified as humic
        above 5 classified as fulvic
E4/E6 ratio
Geltsdale              E4/E6
Pre-blocking           Unblocked Blocked All
                                          grips
          23/11/2007         8.90    3.60    6.25
          15/01/2008         4.88    3.76    4.32
                                                    Priorsdale E4:E6
Post-blocking                                0.00              Blocked Unblocked All
          07/02/2008         9.08  10.38     9.73                                grips
          25/03/2008         3.83    7.25    5.54   27/11/2007   13.5     9.7     11.6a
          01/05/2008         3.83  58.00 30.92      15/01/2008   11.0     2.1     6.6ab
          05/06/2008         9.54  10.40     9.97   07/02/2008   10.0     7.9     8.9ab
          01/07/2008        13.09  15.06 14.07      25/03/2008
          02/10/2008         6.02    6.70    6.36   06/06/2008   5.4      7.0     6.2ab
          13/11/2008         3.29    3.03    3.16   01/07/2008   2.4      2.1      2.3b
          27/02/2009        16.50  10.45 13.47      27/02/2009   6.2     10.0     8.1ab
          25/03/2009         7.88    2.10    4.99   25/03/2009   4.1      5.5      4.8b
Mean since blocking          8.12  13.97 10.73      Mean         7.5      6.3      6.9
Suspended Sediment
• Some studies on IMPACTS of suspended sediments
from peatlands
(Holden 2005, 2006; Rothwell et al 2005; Yeloff et al
2005; White et al 1996; Stewart 1963 )

• Little data on erosion rates or supply to main channels
(Holden 2007)

• Ranges of SS from Holden 2007 at peak discharge were
Undisturbed catchment (1) - 2.5 mg/l
Grips                   (3) - 25-14 mg/l
Blocked grips           (2) - 0.2- 0.14 mg/l
Suspended sediments


Geltsdale                    SS        (mg/l)
Pre-blocking                 Unblocked Blocked All grips Bridge                 SS       (mg/l)
                23/11/2007                                                      Blocked Unblocked All        Bottom
                15/01/2008         2.0     11.0      6.5          9 Priorsdale                       grips slope
Post-blocking
                                                                     27/11/2007      6.5          77 41.75         1.00
             07/02/2008           23.5     17.5     20.5          7
             25/03/2008           12.0     27.0     19.5          3
                                                                     15/01/2008     11.5           3    7.25       5.00
             01/05/2008                                              07/02/2008        6         5.5    5.75      14.00
             05/06/2008                                              25/03/2008
             01/07/2008                                              06/06/2008
             02/10/2008            9.0      1.0      5.0          4 01/07/2008
             13/11/2008            3.0     14.5      8.8          1
             27/02/2009
                                                                     27/02/2009
             25/03/2009            4.0      1.0      2.5          2 25/03/2009         8        63.5 35.75         1.00
Mean since blocking               10.3     10.2     10.2          3 Mean               8      37.25 22.625         5.25
Peatscapes II
New hydrological hypothesis                             Active flow paths
                                                      in the acrotelm layer
      Pipes in the
      catotelm layer



            WT                                       grip

  • Moving pressure transducers closer to the grip edge to see if there are any
  edge effects from unblocked grips

  • Mapping all observation sites to look at the effect of surface topography on the
  recorded depth to the water table

  • Putting pressure transducers in the shallow acrotelm layer to study the activity
  of runoff within the layer. The layer could be producing a temporary perched
  water table and the instruments will pick this up.

  • In Priorsdale we could move the flow gauge from one unblocked grip to the
  other to see if it has higher flow rates.
Summary
                                   Hydrology
• Unblocked grips respond rapidly to rainfall
• RO smoothed in blocked grips
• Some attenuation from blocked grip area and buffered by interaction with
acrotelm area but still HIGH RO to main channels
• New hypothesis- ON/OFF switch
                                       WQ
• No clear effect of blocking on colour and DOC at either site YET
• Increase of colour and DOC in blocked (like Worrall et al , 2007 and Dodd,
2008)
•Seasonality

                               Peatscapes II
• Moving some instrumentation to test new hypothesis

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Clad oct09 pquinn (nx_power_lite)

  • 1. Peatscapes: Monitoring of Hydrology and Water Quality at Geltsdale and Priorsdale Report of Phase 1: Nov 2007 – Mar 2009 Dr Jennine Jonczyk, Dr Mark Wilkinson, Dr David Rimmer and Dr Paul Quinn
  • 2. Some of the features in the catchment Pilot pond Overland flow following gradient of slope Leaky stream gauge wooden barrier PILOT POND STREAM Overflow SPILL Woodland Leakage R1 stream Diversion gauge structure Belford Burn Roughly 200m 1.35km 1.15km 1.85km R1 R2 R3 BEL Upper Belford Burn “Pilot pond” Features 1 to 3
  • 3. Some of the features in the catchment 1.35km 1.15km 1.85km R1 R2 R3 BEL Upper Belford Burn “Pilot pond” Features 1 to 3
  • 4. Some of the features in the catchment 1.35km 1.15km 1.85km R1 R2 R3 BEL Upper Belford Burn “Pilot pond” Features 1 to 3
  • 5. …but that was last week! Lower Lady’s well feature
  • 6. Outline 1. Questions to answer 2. Hydrology 3. WQ 4. Peatscapes II
  • 7. Questions to answer How does grip blocking effect :- 1. Water table 2. Water colour (& Dissolved Organic Carbon; DOC) 3. Suspended sediment HOW are we investigating this? 1. (Water table) using pressure transducers in the peat 2. (Colour) grab samples taken from grips and downstream pts and measuring DOC and absorbance in lab. 3. (SS) Filtering grab sample
  • 8. Working Hypothesis ARE grips like open drainage ditches? What happens when it rains? Q WT
  • 9. Blocked Grip Generic Blocked Grip experimental Unblocked Grip Lay-out Unblocked Grip Dip-wells with pressure transducers upslope and downslope of grips Dip-wells at mid-point between grips Water quality sample from grips.
  • 10. Relative water level in grips (cms) 25 /0 9/ 20 07 00 0 10 20 30 40 50 60 70 :0 0 14 /1 1/ 20 07 00 :0 0 03 /0 1/ 20 08 00 :0 0 22 /0 2/ Grip 1 20 08 00 : 00 12 /0 4/ 20 08 00 :0 0 Grip 2 (Blocked) 01 /0 6/ 20 08 00 :0 0 rainfall 21 /0 7/ 20 08 Geltsdale Hydrology: Grips 00 :0 0 09 /0 9/ 20 08 00 : 00 8.00 6.00 4.00 2.00 0.00 20.00 18.00 16.00 14.00 12.00 10.00 15-min rainfall (mm)
  • 11. Geltsdale Hydrology: Water table 25/09/2007 14/11/2007 03/01/2008 22/02/2008 12/04/2008 01/06/2008 21/07/2008 09/09/2008 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 0 -50 Depth of water table from surface (cms) -100 -150 -200 -250 Downslope of grip1 Upslope of grip 1 Downslope of grip 2 Upslope of grip 2
  • 12. 09 / 03 Grip water level (cm) /2 00 8 09 00 /0 : 10 15 20 25 30 35 40 45 50 -5 0 5 3/ 00 2 00 8 10 16 /0 :1 3/ 5 20 08 11 08 /0 :3 3/ 0 20 grip 3 08 11 00 /0 :4 3/ 5 20 08 12 17 /0 :0 3/ 0 20 08 13 09 /0 :1 3/ 5 20 08 13 01 /0 :3 E.g. Data anomalies 3/ 0 20 08 grip 2 (blocked) 14 17 /0 :4 3/ 5 20 08 15 10 /0 :0 3/ 0 20 08 15 02 /0 :1 3/ 5 20 08 16 18 /0 :3 3/ 0 20 08 17 10 /0 :4 3/ 5 20 08 Temp - 850mAoD (°C) 03 :0 0 0 1 2 3 4 -5 -4 -3 -2 -1 Temperature (°C)
  • 13. 02 /0 5 /2 Relative water level in grips (cms) 00 8 00 :0 10 15 20 25 30 35 40 0 5 0 07 /0 5 /2 00 8 00 :0 0 12 /0 5 /2 00 8 00 :0 0 Grip 1 17 /0 5/ 20 08 00 : 00 22 /0 5/ 20 08 Grip 2 (Blocked) 00 : 00 27 /0 5/ 20 08 00 :0 rainfall 0 01 /0 6/ 20 08 00 :0 0 8.0 6.0 4.0 2.0 0.0 20.0 18.0 16.0 14.0 12.0 10.0 Geltsdale Hydrology:- Response in grips in May 2008 15 min rainfall (mm)
  • 14. Geltsdale Hydrology: Water table response in May 2009 02/05/2008 00:00 07/05/2008 00:00 12/05/2008 00:00 17/05/2008 00:00 22/05/2008 00:00 27/05/2008 00:00 01/06/2008 00:00 0 -10 Depth of water table from surface (cms) -20 -30 -40 -50 -60 -70 -80 -90 -100 Downslope of grip 1 Upslope of grip 1 Downslope of grip 2 Upslope of grip 2
  • 15. 30 /0 Relative water level in grips (cms) 8/ 20 08 00 :0 0 10 20 30 40 50 60 0 01 /0 9/ 20 08 00 :0 0 03 /0 9/ 20 08 00 : 00 05 /0 9/ 20 Grip 1 08 00 : 00 07 /0 9/ 20 08 00 : 00 09 /0 Grip 2 (Blocked) 9/ 20 08 00 : 00 11 /0 9/ 20 08 Rainfall 00 : 00 13 /0 9/ 20 08 00 : 00 Geltsdale Hydrology: Response in grips during Sept 2008 8 6 4 2 0 20 18 16 14 12 10
  • 16. Geltsdale Hydrology:- response in water table during Sept 08 storm 30/08/2008 01/09/2008 03/09/2008 05/09/2008 07/09/2008 09/09/2008 11/09/2008 13/09/2008 00:00 00:00 00:00 00:00 00:00 00:00 00:00 00:00 0 Depth of water table from surface (cms) -10 -20 -30 -40 -50 -60 -70 -80 Downslope of grip 1 Upslope of grip 1 Downslope of grip 2 Upslope of grip 2
  • 17. Observations in unblocked grips No response in water table position - no matter where they are Flashy spiky flow in grips.
  • 18. Observations in blocked grip Nice and smooth – less spiky and less flashy response in grip Water table position is again not responding to flow
  • 19. Working Hypothesis • Grips and Pipes are ‘off’ even though there may be a water table present • Small additions of percolating rain – connect all the pipes and grip together • What comes in goes out • When rain stops, flow stops and pipes empty Active flow paths in the acrotelm (top) layer pipes grip WT
  • 21. Colour • Water colour is caused by the presence of dissolved organic compounds – predominantly humic and fulvic acids, which are the products of decomposition from organic soils. • Current EU Drinking water standard for Water colour is :- 20 Hazen • Colour of River Tees is: 60-120 Hazen
  • 22. Colour Geltsdale Colour (Hazen) Pre-blocking Unblocked Blocked All Grips 23/11/2007 165 147 156bc Priorsdale 15/01/2008 105 164 135bc Colour (Hazen) Blocked Unblocked All 07/02/2008 48 51 50de grips 25/03/2008 34 35 35e 27/11/2007 77.0 77.4 77.2abc 01/05/2008 34 118 76cde 15/01/2008 39.0 41.7 40.4bc 05/06/2008 185 216 200ab 07/02/2008 10.9 20.7 15.8c 01/07/2008 269 244 257a 25/03/2008 frozen * * 02/10/2008 146 149 148bcd 06/06/2008 218.5 83.8 151.2a 13/11/2008 168 125 146bc 01/07/2008 154.4 117.7 136.1ab 27/02/2009 97 139 118bcde 27/02/2009 123.5 57.0 90.3abc 25/03/2009 109 95 102cde 25/03/2009 62.5 29.0 45.8bc Mean since blocking 121 122 122 Mean 98.0 61.1 79.5
  • 23. DOC • Dissolved Organic carbon is derived from organic matter and has a strong correlation with WATER COLOUR. •DOC is an important component of the carbon cycle in streams and a primary food source. •Evidence for upward trend in DOC concentrations related to atmospheric deposition changes. (Worrall et al, 2004; Evans et al, 2006)
  • 24. DOC Geltsdale DOC (mg/l) Pre-blocking Unblocked Blocked All grips 23/11/2007 35.1 32.9 34.0bc 15/01/2008 24.0 25.3 24.6cde Priorsdale DOC (mg/l) Post-blocking Blocked Unblocked All 07/02/2008 17.8 18.0 17.9e grips 25/03/2008 15.6 17.3 16.5e 27/11/2007 21.6 21.8 21.7ab 01/05/2008 15.6 27.7 21.7de 15/01/2008 15.6 16.2 15.9ab 05/06/2008 38.0 42.2 40.1ab 07/02/2008 12.4 13.2 12.8b 01/07/2008 51.1 46.8 49.0a 25/03/2008 02/10/2008 32.4 32.7 32.5bc 06/06/2008 43.8 22.8 33.3a 13/11/2008 36.6 29.3 33.0bc 01/07/2008 26.0 21.8 23.9ab 27/02/2009 24.3 31.5 27.9cd 27/02/2009 29.0 18.5 23.8ab 25/03/2009 26.5 24.2 25.4cde Mean since 25/03/2009 20.0 14.5 17.3b blocking 28.7 30.0 29.3 Mean 24.1 18.4 21.2
  • 25. E4/E6 ratio • Ratio of humic acid(E4) and fulvic acid(E6) • Used to represent the degree of humification in peat Humification is decomposition of vegetation….. • Ratio below 5 classified as humic above 5 classified as fulvic
  • 26. E4/E6 ratio Geltsdale E4/E6 Pre-blocking Unblocked Blocked All grips 23/11/2007 8.90 3.60 6.25 15/01/2008 4.88 3.76 4.32 Priorsdale E4:E6 Post-blocking 0.00 Blocked Unblocked All 07/02/2008 9.08 10.38 9.73 grips 25/03/2008 3.83 7.25 5.54 27/11/2007 13.5 9.7 11.6a 01/05/2008 3.83 58.00 30.92 15/01/2008 11.0 2.1 6.6ab 05/06/2008 9.54 10.40 9.97 07/02/2008 10.0 7.9 8.9ab 01/07/2008 13.09 15.06 14.07 25/03/2008 02/10/2008 6.02 6.70 6.36 06/06/2008 5.4 7.0 6.2ab 13/11/2008 3.29 3.03 3.16 01/07/2008 2.4 2.1 2.3b 27/02/2009 16.50 10.45 13.47 27/02/2009 6.2 10.0 8.1ab 25/03/2009 7.88 2.10 4.99 25/03/2009 4.1 5.5 4.8b Mean since blocking 8.12 13.97 10.73 Mean 7.5 6.3 6.9
  • 27. Suspended Sediment • Some studies on IMPACTS of suspended sediments from peatlands (Holden 2005, 2006; Rothwell et al 2005; Yeloff et al 2005; White et al 1996; Stewart 1963 ) • Little data on erosion rates or supply to main channels (Holden 2007) • Ranges of SS from Holden 2007 at peak discharge were Undisturbed catchment (1) - 2.5 mg/l Grips (3) - 25-14 mg/l Blocked grips (2) - 0.2- 0.14 mg/l
  • 28. Suspended sediments Geltsdale SS (mg/l) Pre-blocking Unblocked Blocked All grips Bridge SS (mg/l) 23/11/2007 Blocked Unblocked All Bottom 15/01/2008 2.0 11.0 6.5 9 Priorsdale grips slope Post-blocking 27/11/2007 6.5 77 41.75 1.00 07/02/2008 23.5 17.5 20.5 7 25/03/2008 12.0 27.0 19.5 3 15/01/2008 11.5 3 7.25 5.00 01/05/2008 07/02/2008 6 5.5 5.75 14.00 05/06/2008 25/03/2008 01/07/2008 06/06/2008 02/10/2008 9.0 1.0 5.0 4 01/07/2008 13/11/2008 3.0 14.5 8.8 1 27/02/2009 27/02/2009 25/03/2009 4.0 1.0 2.5 2 25/03/2009 8 63.5 35.75 1.00 Mean since blocking 10.3 10.2 10.2 3 Mean 8 37.25 22.625 5.25
  • 29. Peatscapes II New hydrological hypothesis Active flow paths in the acrotelm layer Pipes in the catotelm layer WT grip • Moving pressure transducers closer to the grip edge to see if there are any edge effects from unblocked grips • Mapping all observation sites to look at the effect of surface topography on the recorded depth to the water table • Putting pressure transducers in the shallow acrotelm layer to study the activity of runoff within the layer. The layer could be producing a temporary perched water table and the instruments will pick this up. • In Priorsdale we could move the flow gauge from one unblocked grip to the other to see if it has higher flow rates.
  • 30. Summary Hydrology • Unblocked grips respond rapidly to rainfall • RO smoothed in blocked grips • Some attenuation from blocked grip area and buffered by interaction with acrotelm area but still HIGH RO to main channels • New hypothesis- ON/OFF switch WQ • No clear effect of blocking on colour and DOC at either site YET • Increase of colour and DOC in blocked (like Worrall et al , 2007 and Dodd, 2008) •Seasonality Peatscapes II • Moving some instrumentation to test new hypothesis