基于空间分布的灌区灌溉水利用系数计算方法分析

Analysis of calculation method of water efficiency of irrigation district based on spatial distribution

采用经验公式法和实测拟合法分别计算了河南省人民胜利渠灌区渠道单公里渗漏量,以斗渠为控制单元,分不同方案自下而上计算不同级别渠道渗漏损失和推算渠首流量。采用多元线性回归的方法分析计算基于空间分布的灌区灌溉水利用系数,并得出了适于该灌区灌溉水利用系数空间分布的计算方法,为分析计算灌区不同斗渠控制单元灌溉水量向渠首灌溉水量的转换提供技术手段和科技支撑。

The paper used methods of empirical formula and measured fitting to calculate channel leakage per kilometer in Henan province people's victory irrigation district. Taking the lateral canal as control unit,it calculated the canal seepage and canal head flow of different level canals from bottom to top in different plans. It analyzed water efficiency of irrigation based on spatial distribution by using the method of multiple regression analysis and obtained the suitable method of spatial distribution of water efficiency that is suitable for the irrigation area. The result can provide technical means and technical support for the transformation of canal irrigation water from different lateral canal to canal head.