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4. INFILTRATION - GitHub Pages

Watershed properties _____ 77 4. INFILTRATION INFILTRATION is the process of water entry into a soil from rainfall, or irrigation. Soil water movement (percolation) is the process of water flow from one point to another point within the soil. INFILTRATION rate is the rate at which the water actually infiltrates through the soil during a storm and it must be equal the INFILTRATION capacities or the rainfall rate, which ever is lesser. INFILTRATION capacity the maximum rate at which a soil in any given condition is capable of absorbing water. The rate of INFILTRATION is primarily controlled by the rate of soil water movement below the surface and the soil water movement continues after an INFILTRATION event, as the infiltrated water is redistributed. INFILTRATION and percolation play a key role in surface runoff, groundwater recharge, evapotranspiration, soil erosion, and transport of chemicals in surface and subsurface waters.

Cover material protect the soil surface. A bare soil leads to the ... Bulk density is defined as the ratio of the dry solid weight to the soil bulk volume. The bulk volume includes the volume of the solids and the pore space. ... runoff caused by the rainfall given in the Table E4.2 is 282 097 m3. Table E4.2: Time=(hr)Rainfall=(mm/hr) 00=to=2 ...

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