洼地

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

这场骤雨有低洼淹没。

The cottage is in that hollow.

村舍在那片洼。

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

层岩溶带位于风化壳层上部，风化淋滤及径流改造而破碎，短距离搬运堆积于势相对较低洼风化壳面，形成一些溶沟、溶洞、溶缝、溶蚀洼、溶蚀漏斗及落水洞等，其充填物主要残积物和洞壁塌积物。

The karst depression belongs to the accumulative area of surface water and subdrainage area of subsurface water, the karstification is relatively week, and reservoirs are undeveloped.

岩溶斜坡和岩溶洼水汇集区及下水排泄区，岩溶作用相对较弱，储层不发育。