柴达木盆地1∶50 000尕海镇幅水文地质图数据集

Gahai Town, located in the Bayin River piedmont plain on the northeastern edge of the Qaidam Basin, is an area of the 1:50 000 map sheet that meets international standards. In accordance with the basic requirements of the Specification for Preparation of Hydrogeological Maps (1:50 000), which was developed under the guidance of China Geological Survey (CGS), and is to be issued and implemented, the hydrogeological map of Gahai Town is prepared in line with the needs of the development and construction of the town. Besides existing information and data, the hydrogeological map is based on the results and data obtained from the latest 1:50 000 hydrogeological survey in Gahai Town in 2016. It includes the results of borehole pumping tests (48 boreholes in total, including those drilled for this survey as well as already in existence, according to the data collected) and analytical results from analysis of water chemistry (61 water samples), isotope (12 isotope samples) and soluble salts in soil (55 soil samples) and the results of simultaneous measurement of groundwater level (68 simultaneous-measurement points). With the guidance of groundwater system and eco-hydrogeology theories, the dataset of the hydrogeological map is formed, based on the data processing of the groundwater system, hydrogeological structure, water-bearing rock formation and water yield properties, groundwater recharge-runoff-discharge condition, chemical characteristics of the groundwater, groundwater level depth and flow field, the relationship between groundwater and eco-vegetation, groundwater development and exploitation. Thus, it is possible to present massive information on the map by the combination of a master map with mosaic maps, clearly and hierarchically, providing groundwater data in a visualized and easy-to-use way for the development and exploitation of the local water resources, as well as for the protection of the local ecology and environment.

尕海镇地处柴达木盆地东北缘巴音河山前平原，属于符合国际标准的1:5万比例尺图幅覆盖范围。依据中国地质调查局（China Geological Survey, CGS）牵头编制、即将发布实施的《1:5万水文地质图件编制规范》的基本要求，并结合该镇开发建设的实际需求，编制了尕海镇水文地质图。该图件除依托已有信息资料外，核心数据基础为2016年开展的最新尕海镇1:5万水文地质调查成果与实测数据，具体包括：共计48口钻孔的抽水试验成果（含本次调查新施工钻孔及既有钻孔，数据均来自野外采集）、61组水化学分析样品的检测结果、12组同位素样品测试数据、55组土壤可溶性盐样品分析结果，以及68个地下水位同步监测点的观测数据。本水文地质图数据集以地下水系统与生态水文地质学理论为指导，通过对地下水系统、水文地质构造、含水岩组与富水性、地下水补给-径流-排泄条件、地下水化学特征、地下水位埋深与流场、地下水与生态植被的相互关系、地下水开发利用现状等要素开展数据处理与整合而成。最终通过主图与镶嵌图结合的方式，实现海量地学信息的清晰分级可视化呈现，可为当地水资源开发利用、生态环境保护提供直观易用的地下水数据支撑。