基于抽站法的乐安河流域合理雨量站网密度研究

Study on Appropriate Precipitation Station Density Based on Station Sampling Method

以江西省乐安河流域为例,在流域内选择高程和面积不等的五个区域,针对1d和1h两种时段,采用抽站法对比分析了各区域在不同面雨量计算方法、不同抽站密度及不同允许误差条件下的时段面雨量计算精度,揭示了影响面雨量计算精度的主要因素,并确定了给定精度要求下各区域的合理布站密度及乐安河流域合理雨量站网密度经验公式,为江西省乐安河流域及其他类似地区的雨量站网布设提供了参考。

Taking Le’an River Basin in Jiangxi Province for an study area, five regions with unequal elevation and area were selected. The station sampling method was applied to analyze and compare the accuracy of areal precipitation calculation in these regions under different calculation methods，different station density and permissible errors with different rainfall durations： 1 day and 1 hour. As a result，the main factors influencing the accuracy of areal precipitation calculation were revealed, and the appropriate density of stations and the empirical formula under the given accuracy were determined. This study provides a reference for the arrangement of precipitation stations network in the Le’an River Basin and other similar areas.