SWMM UTM KAMAL

1. Modelling Urban Runoff Quantity using Storm Water Storm
Water Management (SWMM)
Prepared by
Kamal Ahmed
(PA123084)
Supervisor
Dr. Shamsuddin Shahid

2. Introduction
o EPA's Storm Water Management Model (SWMM) is used throughout
the world for planning, analysis and design related to stormwater
runoff, combined and sanitary sewers, and other drainage systems in
urban areas.
o SWMM is a comprehensive hydrological and water quality
simulation model used for single or continuous events of runoff in
urban areas.
o Stormwater monitoring programs in urban catchment are crucial for
characterizing the quality of stormwater runoff and formulate
effective pollution control strategy.
o SWMM tracks the flow rate, flow depth, and quality of water in each
pipe and channel during a simulation period made up of multiple time
steps.

3. Introduction
 SWMM 5 has recently been extended to model the hydrologic
performance of specific types of low impact development
(LID) controls.
 The LID controls that the user can choose include the
following seven green infrastructure practices:
o Bio-Retension cell
o Rain gardens
o Green roofs
o Street planters
o Rain barrels
o Infiltration trenches
o Vegetative swales

4. Model parameterization
 SWMM requires three major information for runoff quantity
modelling:
(1) Physical Catchment Characteristics
(2) Rainfall
(3) Infiltration
 The physical catchment data are
(a) Total catchment area (A)
(b) Percentage of impervious area (%Imp)
(c) Catchment width (W)
(d) Average slope (So)
(e) Surface depression storage
(f) Surface roughness

5. Study Area

7. Parking Lots

8. Landuse

9. Catchments

10. Sub
catchment Area Width Slope
S1 103 597 4
S2 41 377 3
S3 59 750 7
S4 53 592 8
S5 17 520 2
S6 11 347 2
S7 42 705 1
S8 34 259 2

16. Sub catchment Area Width Slope
S1 103 597 4
S2 41 377 3
S3 59 750 7
S4 53 592 8
S5 17 520 2
S6 11 347 2
S7 42 705 1
S8 34 259 2

17. Horton Infiltration

18. Junction Invert Elevation
J1 29
J2 23
J3 21
J4 18
J5 17
O 16

19. Conduits Length
C1 2404
C2 2204
C3 1295
C4 1584
C5 4159

31. THANK YOU