众所周知,大型水电闸的建造会改变当地的环境条件,因而对人民健康可能产生负面影响。生态环境的变化不仅改变了原有疾病的发病率、患病率和发病程度,而且还有可能带来新的疾病并使之扩散。从60年代到70年代,象牙海角地区共建成22个水闸。科索和泰勃是其中最大的两个水电闸,它们位于象牙海角地区中部,水闸建成后,两湖的湖岸变陡,湖水淹没了周围的草被,从而给螺类 It is well-known that the construction of a large hydropower dam can change the local environmental conditions and therefore may have a negative impact on people’s health. Changes in the ecological environment have not only changed the morbidity, prevalence and incidence of the original diseases, but they have also the potential to cause new diseases and spread them. From the 1960s to the 1970s, a total of 22 sluices were built in the Ivory Coast. Corso and the Tiber is one of the two largest hydropower locks in the middle of the Ivory Coast. After the floodgates are built, the lakeshore of the two lakes becomes steep and the lake water inundates the surrounding grass so that the snails