低洼

The surrounding land is low and marshy.

周围地低洼而多沼。

The torrential rain may flood the low-lying land out.

骤雨有可能把低洼地淹没。

Hypergenesis palaeokarst usually manifests distinct vertical zoning rule which divides into epikarst zone, vadose zone and phreatic zone.

表层岩溶带位于风壳表层上部，风淋滤及地表径流改造而破碎，短距离搬运堆积于地势相对较低洼风壳表面，形成一些溶沟、溶洞、溶缝、溶蚀洼地、溶蚀漏斗及落洞等，其充填物主要为地表残积物和洞壁塌积物。

Minish the well space and increase transflux routeways upper backwater and driving, especially setup precipitation well and drain residual water at the bottom of diving layer.

减小井间距，增加上层滞和入流通道，尤其要在含层底板低洼处设置降井将低洼处残留引走。