高放废物处置库甘肃北山预选区水文地质特征研究

在高放废物深地质处置中，地下不是核素迁移的重要媒介。因此，水文地质工作是处置库选址中的主要内容之一。本文依据几年来的野外调查及前人的部分资料，阐明了我国高放废物处置库甘肃北山预选区的基本水文地质概况，以及地下水的循环交替条件和化学特征。研究表明，弱含水、低渗透、慢流速是区内主要水文地质特征，蒸发浓缩形成的高矿化是地下水的主要化学面貌。这一认识，为处置库选址提供了重要依据。

Hydrogeological characteristics of Beishan preselected area, Gansu province for China''''s high-level radioactive waste repository

Groundwater is the major carrier for radionuclide migration in the high level radioactive waste disposal . For this reason the hydrogeological study is one of the main contents in repository siting. According to the field investigation which has been carried out during the last few years and some data from the previous study, this paper describes the general hydrogeological situation and groundwater circulation, as well as chemical characteristics of groundwater in Beishan preselected area, Gansu province. The research shows that main hydrogeological characteristics of the Beishan area is water bearing character, low permeability and slow water movement while the major chemical feature of groundwater is high mineralization. This recognition will provide an important basis for repository siting in the site area.