钉螺的水力输送

血吸虫病是中国和其它许多国家的一种地方性流行病，钉螺是血吸虫唯一的中国宿主，钉螺运移是血吸虫病蔓延的主要原因。研究钉螺在河道中的输移规律，对控制血吸虫病流行十分重要。野外观测和实验研究表明、钉螺输移、尤其是大量钉螺的远距离输移，是借助于水流完成的，河流中钉螺的水力输送主要是以悬移质和移质的形式，以及被漂的挟带。

ONCOMELANIA'S HYDRAULIC TRANSPORT

Schistosomiasis is an endemic in China and other lands.Oncomelania is the only intermediate host of schistosome.Oncomelaniamovement is the major way spreading schistosomiasis.It is very necessary for schistosomiasis control to study motion law of Oncomelania in river.Both the model experiment and the field surrey are carried in this study,and a lot of data have been obtained.By analysis of the data,it is suggested that major Oncomelania movement,especially,in a long distance is achieved with water flow.Oncomelania transport carries in river mainly as suspended solid,as bed load and by floating drift.