Evaluation Of River Network Planning Layout In Plain City Consideration For Combining Water Quality And Flood Control

Economic and social development has brought higher requirements for the adjustment of river network layout. The paper took Nanhai Future City of Yancheng as the research object, and considered factors such as urban development, land use covers and landscape structure to preliminarily formulate river network planning layout, demonstrating the rationality of river network planning layout based on comprehensive consideration of water quality and flood control. The quantity of ecological outer water diversion was considered separately in the dry season and the flood season, the water diversion projects and the controlling projects - sluices and pump stations - were rationally arranged to realize the water quality control effect in the district and met the water flood control requirement, which were regarded as the premise of evaluation of river network layout. The results showed that for the outstanding water quality problems of river network in plain, the water quality improvement effect of several replenishment points was better than that one point. When the water surface rate remained unchanged, the river network layout adjustment could slightly affect flood control and could meet the flood control requirements. Generally, this method provided a reference for river network planning layout in other similar areas.