Soil available water capacity (AWC) plays an important role in the evaluation of drought resistance of soil, planning and managing water resources and conducting irrigation.
土壤有效含水量（AWC）是评价土壤抗旱性、水资源规划和管理以及指导灌溉的重要依据。
Calculation of quantity of soil evaporation takes an important part in moisture content prediction, rainfall surface flow calculation and evaluation of water resources.
土壤蒸散发量的计算，在墒情预报、降雨径流计算及水资源评价中都占有重要的地位。
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