考虑生态因子敏感性的骆驼井水源地可开采量评价模型  

Eco-environmental Sensitivity Evaluation Model of Groundwater Exploitable Yields in Luotuojing Water Resource Field

作　　者：钱开铸[1] 吕京京[1] 王旭升[1] 赵振宏[2] 马洪云[2] 

机构地区：[1]中国地质大学(北京)水资源与环境学院,北京市100083 [2]中国地质调查局西安地质调查中心,西安市710054

出　　处：《勘察科学技术》2013年第5期10-15,共6页Site Investigation Science and Technology

基　　金：中国地质调查局鄂尔多斯盆地(宁夏)能源基地地下水勘查(水[2011]02-56-05)项目专题;中央高校基本科研业务费专项资金资助项目(2011YYL120);中国地质大学(北京)研究生科技创新扶持奖励基金

摘　　要：骆驼井水源地位于鄂尔多斯盆地西缘,连接宁夏与内蒙古自治区。该研究区气候干旱且生态脆弱,地下水开采将夺取部分维持生态环境的水量。因此,以北大池闭流区为研究范围,该文提出了考虑生态因子敏感性的骆驼井水源地可开采量评价模型。并采用了参数最优化方法反演了降水入渗系数和含水层渗透系数,将北大池湖滩面积、基流量、地下水蒸发量和含水层贮量作为生态敏感因子。根据20年长期开采条件下的模拟结果,分析了各开采方案下的生态因子敏感性。结果表明:骆驼井水源地的最大可允许开采量为0.11×108m3/a。该开采量可使北大池湖滩面积维持在天然面积的85%以上,地下水蒸发总量的衰减幅度不超过3%,且不会显著影响当地生态环境。Luotuojing water resource field locates in west margin of Erdos Basin, which connects Ningxia Province and Inner Mongolia autonomous region. Since the arid climate and fragile eco-system is in there, the groundwater exploitation would cause water-sacrifice, which should be used to maintain eco-environ- ment. Based on eco-environment protection,in region of inland drainage basin called Beidachi, this paper proposes an eco-environmental sensitivity evaluation model of groundwater exploitable yields in Luotuojing water resource field with parameters optimization of precipitation infiltration and aquifer permeability, and makes the lake beach area, base flow, groundwater evaporation and aquifer storage as ecological sensitive factors. Based on simulation results in last for a 20 years long term exploitation,it analyzes the sensitivity of ecological factors in each assumed pumping rate. The results show that the maximum pumping rate is 0.11×10^8m^3/a. It can maintain the Beidachi lake beach area above 85% for natural area,and the groundwa-ter evaporation reduction below 3% ,which it has not an obvious influence on local eco-environment.

关 键 词：水资源 生态环境影响 基流量 湖泊面积 潜水蒸发量 

分 类 号：P641.8[天文地球—地质矿产勘探]