管井出水量减少是常见的问题，特别是第四系松散层中的管井更为普遍。
The reducing in water production of tube well is a familiar problem, especially in the loose bed of the quaternary system.
从大连红黏土被第四系松散层所覆盖的现象出发，分析了大连地区沿海岸附近冰碛残丘的特征与形成过程。
The characteristic and the formation process of moraine hill in the Dalian area along the coast are analyzed from the phenomenon of the Quaternary incompact layer covering the Dalian red clay.
塌陷主要分布在松散层较薄的第四系覆盖区，发生时间主要集中于枯水年份或年内枯水期和丰水期初。
The collapse mainly occurs in the low - water years or during the beginning of the dry season and rain season in a year.
本文结合杭州市城市地质调查中浅层地震勘探，在第四系厚覆盖区，针对查明基岩埋深、确定松散沉积层的分层。
We're referring to integrate with the shallow layer of earthquake in Hangzhou urban geological survey in this paper.
第四系松散堆积层发育完全，厚度大。
Quaternary overburden is completely developed with thick layer.
第四系松散堆积层发育完全，厚度大。
Quaternary overburden is completely developed with thick layer.
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