Classification of hydrogeological structure along the Red River in the Hanoi area

Hanoi city has abundant groundwater, supplemented by the surface water (mainly Red River) all year round, and extensive shallow aquifers, which are easily exploited large-diameter wells. There always exists some open hydrogeological windows in River area with an structure; therefore, groundwater a strained hydraulic relationship system Along from Ba Vi to end of Phu Xuyen district, there nine regions three types four sub-types different structures. In particular, sub-type I-A tight correlation since structure bottom includes aquifers: Holocene (qh), upper Pleistocene (qp2), lower (qp1) that constructs system. The I-B is characterized at bottom, including aquitard Vinh Phuc two aquifers qp2 qp1, form II-A distinguished fact crosses aquifer qh; no aquitards between qh system; separates qp1. II-B identified crossing qp2; qp1 so can create Type III solid existence both aquitards; thus, versus inferior.