陇东白垩系盆地地下水赋存特征及水资源属性

陇东盆地能源丰富,水资源短缺。盆地深层白垩系地下水来自古地质历史时期,受地质构造、岩性变化影响和控制地下水具有补给不足,径流、排泄不畅、更新缓慢的特点,地下水资源开采以消耗弹性储存量为主。弹性储存量虽然数量很大,但没有后续性补给量,且受开采和环境条件的限制,不可能大量抽取,否则会引起地质环境恶化。认识好白垩系深层地下水资源的固有属性,有助于合理开发利用深层地下水资源。

Occurrence Characteristics of Cretaceous Groundwater and Its Resource attribute in Longdong Basin

Longdong Basin underlying complex Cretaceous aquifer is a large-scale sedimentary basin with arid climate and closefisted mean annual precipitation in eastern area of Gansu Province,where abundant mineral resource is present and one of the important energy bases.Cretaceous depth water are supplied in ancient geological period,groundwater flow slowed and its discharged obstructed are controlled by the synclinal basin and stratum lithology.Groundwater resources are accessible for use elastic storage.The elastic storage although very great,but has no follow-up measure of supply,and can＇t be a large number controlled by the exploitation and environmental conditions,or cause the geological environmental degradation.This article is intended to remind people to go very well know Cretaceous deep water resources of the inherent property to help rationally develop and utilize water resources.