GB/T 20486-2017
ActiveGrade of valley area precipitation
江河流域面雨量等级
Application Summary AI generated
GB/T 20486-2017 defines classification grades for areal precipitation over river basins and valleys, specifying thresholds for light, moderate, heavy, and torrential rainfall. It is applied in hydrometeorological monitoring and flood forecasting across China's river systems, enabling standardized assessment of rainfall intensity for water resource management and disaster prevention. The standard supports engineers and planners in designing drainage infrastructure and emergency response protocols based on precipitation severity.
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