常德市鼎城区自1998年实行“退田还湖”工程后湖泊面积增加、耕地减少。
After reclaiming lake from farmland in 1998 in Dingcheng District, Changde, lake area is increased while cultivated area is decreased here.
湖泊水域面积的减少是自然因素和人类活动综合作用的结果，围湖利用是湖泊水域面积减少的主要原因。
The results showed that:the total lake surface area in the mid lower reaches of the Yangtze River reduced about 2544.
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