赣州地区红层盆地找水模式探讨——以于都盆地为例

Investigation on groundwater searching model in red-bed basin of Ganzhou City:a case study of Yudu Basin

赣州地区白垩纪发育规模不等的红层盆地,且盆地之上人口密集。近些年来,陆相红层盆地干旱日趋严重,随着城镇化的快速推进,居民对地下水的需求量日益增大。通过野外地质调查、地球物理探测及水文地质钻探等手段,研究赣州于都红层地区地下水赋存特征及其富水规律。赣州红层地区地下水主要在构造破碎带、隐伏断裂、地层接触带及层间裂隙中赋存、富集。红层盆地地下水主要受构造控制,地下水勘查和评价应以盆地内红层构造变形特征研究为基础,红层盆地向斜、单斜、盆缘及断层发育部位是有效的地下水储集区。

Various sizes of red-bed basins were developed in Ganzhou area during the Cretaceous,which has a dense population nowadays.In recent years,the drought of continental red-bed basins become continuously serious,with the fast progress of urbanization,residents'demand for groundwater is increasing.This paper studied the groundwater occurrence characteristics and water-rich regularities of the red beds in Yudu of Ganzhou City by the methods such as field geological survey,geophysical exploration,hydrogeological drilling,etc.The results show that the groundwater in red-bed basins of Ganzhou mainly storage and enrich in the structural fracture zone,concealed fractures,stratum contact zone and interlaminar fractures.It is concluded that the groundwater in red-bed basins is mainly controlled by structure,hence,the exploration and evaluation of the groundwater shall base on the tectonic deformation characteristics of red-bed basins,and the developed parts of syncline,monoclinic,basin edge and fractures are effective reservoir area of groundwater.