Abstract: Oncomelania is middle-parasitizeder of schistosome. The diffusion of Oncomelania will lead spread of schistosomiasis by rivers. Oncomelania has two types: mountainous and river network. It has major significance on controll of diffusion of schistosomiasis to study of hydraulic transport of river network-Oncomelania. The present research has found that river network-Oncomelania spreaded with current through three ways: suspended load transport; bed load transport and transport with floating drift. The results indicated that the main long spread way of river network-Oncomelania was transport with floating drift.

Key words: climate change, spatiotemporal distribution, accumulated temperature, planting pattern, rice.