A Study on the drainage index for combined control of surface and subsurface waterlogging;

Optimization of planning for drainage system in plain polder area based on experimental genetic algorithm;

Underground Drainage can be divided into underground level and vertical drainage,waterlogged removal and regulating soaking,but the ground drainage only drains flood,can t drain waterlogged by the earthsurface accumulated water,it is finished by underground drainage.

Application of ANN method to real-time operation of drainage system in plain polder region;