三除涝排水的标准日本除涝排水的设计标准基本上分两大类:一是排除地表多余降雨径流的标准,二是控制农田地下水位的标准。而前者又包括设计降雨、设计外水位和设计内水位三种标准;后者则指设计地下水埋深,有时也包括地下水排水量标准,下面分别加以介绍。 Three standards for waterlogging drainage Japan’s waterlogging drainage design standards are basically divided into two categories: one is to exclude excess rainfall surface runoff standards, and second, control of farmland water table standards. The former includes three criteria: design rainfall, design outside water level and design water level. The latter refers to the design groundwater depth, sometimes including groundwater discharge standards, which are introduced separately below.