典型内陆盆地地下水系统演化及其生态响应研究

项目名称： 典型内陆盆地地下水系统演化及其生态响应研究

项目编号： No.41272273

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 潘世兵

作者单位： 中国水利水电科学研究院

项目金额： 71万元

中文摘要： 地下水是维持内陆盆地生态健康极为关键、敏感的因子，植被退化、湿地萎缩和荒漠化等都与地下水动态变化有着密切的关系。内陆盆地水循环具有复杂性，表现在地表水-地下水多次相互转化和人工干扰，地下水动态变化生态响应机制是需要突破的科学难题；由于基础资料不足，地下水模型参数不确定性问题有待研究。本申请在前人调查研究成果基础上，选择敦煌盆地作为研究区，通过地面调查、遥感、环境同位素、模拟技术等手段，从地下水系统介质场、水动力场和水文地球化学场等角度，开展盆地尺度地下水形成与演化机制研究。首次提出运用空间地质统计学和数量化理论解决区域水文地质参数不确定性。通过建立盆地地下水系统模型以及来水、用水情景模拟，掌握维持保护区绿洲生存的地下水来源、组成、数量及其时空变化规律。研究基于人工神经网络理论的地下水动态变化生态响应的定量分析方法，为流域水资源开发和生态保护提供科学依据；同时丰富完善内陆盆地水循环理论方法。

中文关键词： 地下水系统；环境同位素；数值模型；生态响应；党河流域

英文摘要： Groundwater is one of the most essential and sensitive factors directly related to the ecological system in inner-land basin of Northwest China. The change of groundwater level has resulted in a series of ecological problems such as the degradation of vegetation and wetland as well as the desertification in this region. However, the research of groundwater system and its ecological response is backward because of the shortage of basic data and the complex situation of hydrological cycle represented by the frequent interaction of surface water and groundwater. The principle of ecological response to groundwater dynamic becomes a hot topic in the inner land basin. The uncertainty of regional hydrogeological parameters is also a crucial problem concerning the groundwater model development in basin scale. Based on the early research results and by using comprehensive methods of grand observation, remote sensing, environmental isotope analysis as well as the computer simulation, this proposal aims to investigate the groundwater system and its evolution in Dunhuang basin which is located in Hexi Corridor of Gansu province. The aquifer structure, water flow and geochemical characteristics of groundwater system could be analyzed in basin scale.The spatial geo-statistics and quantization theory could integrated to dete

英文关键词： groundwater system；environmental isotope；numerical simulation；ecological response；Danghe river basin