An introduction is given to dewatering design, calculation of gushing water volume, and selection of pump for the construction of underdrain.
结合工程实际情况，介绍在有地下水地区的暗渠施工降水案设计、涌水量计算、水泵选择。
2
Submersible electric pump is a kind of artificial lift equipment used for oil producing, it has encountered many technical troubles during dewatering gas production.