1998年特大洪灾发生后 ,岳阳市洞庭湖区及长江南岸共废弃或计划废弃 70个围垸实行退田还湖、平垸行洪。为了了解各类型地区平垸行洪 ,退田还湖后血吸虫病疫情的变化 ,我们于 1 999年 5月至 2 0 0 0年 1 1月 ,选择其中 6个已废弃或应废弃但尚未移民的围垸进行了观察 ,现将结果报 After the extraordinary flood in 1998, a total of 70 embankments were abandoned or planned to be abandoned or planted in Dongting Lake area and the southern bank of the Yangtze River in Yueyang City. In order to understand the change of the epidemic situation of schistosomiasis after removing embankments and returning farmland to lake in various areas, from May 1999 to January 2010, 6 of them were either abandoned or abandoned but not yet resettled The embankment carried out the observation, the results will now be reported