At last itindicates measures to integrate the vertical plan andwaterlog prevention including pre-retaining channel forwater from high altitude outwards to the river, construct-ing flood drainage station at key sites, river systemimprovement, protection for city water surface andswamp.

Based on different periods′ physiognomy,hydro-meteorological,losses of floods and waterlog,and construction projects situation in the Liaohe River Basin,we calculated and estimated the economic benefits of waterlog control synthetically.

The paper expounds the content and characteristics of the benefit of water logging resistant engineering, the disaster loss of which is analyzed completely.

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.

To Guangxi s standard for water logging control,in the region-class cities the standard is both-flood-encounter once twenty years(P=5%),the biggest24h prec.