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Description: The amount of water in soil is based on rainfall amount, what proportion of rain infiltrates into the soil, and the soil's storage capacity. Available water storage is the maximum amount of plant available water a soil can provide. It is an indicator of a soil’s ability to retain water and make it sufficiently available for plant use. Available Water Storage is a capacity estimate for the top 150 centimeters of soil. It is calculated from the difference between soil water content at field capacity and the permanent wilting point adjusted for salinity and fragments.
Available water storage is used to develop water budgets, predict droughtiness, design and operate irrigation systems, design drainage systems, protect water resources, and predict yields. AWS is an important input into hydrologic models including the Soil and Water Assessment Tool (SWAT) - a water quality model that is designed to assess non-point and point source pollution at the river basin scale. AWS can also be used as an indication of a soil's drought susceptibility, for water recharge modeling, to assess a soil's ability to support crops, and for many other purposes.
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Copyright Text: Source: USDA, Esri
Spatial Reference:
102100
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Initial Extent:
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Spatial Reference: 102100
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Spatial Reference: 102100
(3857)
Units: esriMeters
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