Hydrology

Hydrology The flow of water across and through near surface environments

Precipitation ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],Weather vs. Climate Patterns

Fig. 4.1 Evaporation & Transpiration

Plant Transpiration Most water absorption occurs in upper half of root zone

Evaporating playa lake with salts around margin, eastern Washington

Water Flow Hillslope Hydrology ,[object Object],[object Object],[object Object],[object Object],[object Object]

Factors Affecting Water Movement in Soils

[object Object],[object Object],[object Object],[object Object],[object Object],Runoff Generation

[object Object],Horton Overland Flow

[object Object],[object Object],[object Object],Horton Overland Flow

[object Object],[object Object],[object Object],[object Object],Horton Overland Flow

Subsurface Stormflow ,[object Object],[object Object]

Macropore flow, Tennessee Valley, California

Saturation Overland Flow ,[object Object],[object Object]

Overland flow, Tennessee Valley, California

[object Object],Direct Precipitation on Channels

Groundwater Flow Driven by hydraulic gradients Q = K I A K is hydraulic conductivity A is cross sectional area I is hydraulic gradient

Hydrographs by Runoff Mechanism Lag to peak Throughflow SOF HOF Peak Runoff HOF SOF Throughflow

Water balance of drainage basins Net difference between precipitation and evaporation yields streamflow or groundwater recharge

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