There is a complicated hydrological regime in Lixiahe region of Jiangsu Province.As a plain area in the East China,both inland river network and cultivated costal areas are well developed.Following the scaled construction of water projects in last decades,hydrological characteristics of the river system has been largely changed in the region which apparently affected the development of hydrological operation.This paper analyzed the causes of changed hydrological regime under the construction of water projec...