塔里木盆地地下水系统划分

DIVISION OF GROUNDWATER SYSTEM OF TARIM BASIN

在分析塔里木盆水文地质条件的基础上,利用地下水系统理论对其地下水进行了系统划分.塔里木盆地为封闭的内陆干旱盆地,属一级地下水系统,根据盆地的沉积环境条件、地表水流域特征,结合地下水补径排条件,进一步划分出二、三级地下水系统.地下水系统边界和地表水流域边界基本吻合,大流域划分为二级地下水系统,在大流域中,将相对独立的小流域结合地层沉积特点划分为三级地下水系统.盆地内共划分8个二级地下水系统,其中Ⅱ、Ⅳ、Ⅵ 3个二级地下水系统可进一步划分出8个三级地下水系统.地下水系统边界有峡口状输入边界、输入(输出)边界、输出边界、扇间活动边界、地下水分水岭5种类型.

Based on the hydrogeologic condition analysis of Tarim Basin,Division of groundwater system of Tarim was done according to groundwater system theory.Tarim Basin,a closed inland droughty basin,belongs to first order groundwater system and can be divided into second and third order groundwater system according to their sedimentary environment and surface water drainage area.The edges of groundwater system are almost superposition with the edges surface water drainage area.Bigger drainage area takes the second order system which can includes several third order systems-small drainage areas.Eight second order groundwater system was distinguished and II,IV and VI second order systems include eight third order in each. Five types of groundwater system division,including gorge input border, input (output) border, output border, inter-fanlike active border, watershed border, can be identified. Reasonable division of groundwater system is significant to groundwater resource assessment, planning, exploration and management.