Distribution and harm of aquatic alligator weed in Nansi Lake drainage area

In order to fully find out distribution of Aquatic alligator weed in Nansi Lake drainage area, an on-site survey on typical inflow rivers of Nansi Lake and lake area was carried out in June 2010. Coverage of the weed at all the monitoring sections was given. Furthermore, one of the inflow rivers -Xiaosha River was chosen to give further investigation to acquaint growth condition of the alligator weed, from which we can get the harm of it to water environment and give countermeasure.