关键词: 南水北调东线;钉螺；血吸虫病；扩散；泵站

Abstract: Objective To understand the probability of Oncomelania hupensis spread in the wa ter-transporting channel in the east route of South-North Water Diversion Project. Methods The investigation of snail distribution was carried out in the waterhead riverway, the fence of pumping station, the water-transporting line, and the Gaoshui River. The flotage was refloated to detect the snails. At the same time, the data were collected and analyzed about the pumping station project, water diversion amount and the tide height, Results There were snails in the water-transporting channel in the east route. There were also snails in the flotage. However, there were no snails in the fence of pumping station, the water-transporting line and the Gaoshui River. Conclusions The “oodgate, fence , water pump of pumping station and the water-transporting river have the effect of countercheck and sedimentation to snails. The water level of the water-transporting river is maintained at higher level when the river was running. Therefore t the water-transporting channel in the east route is not suited to snait growth and propagation.

Key words: East route of South-North Water Diversion Project , Oncomelania hupensis, Schistosomiasis, Spread, Pumping station