摘要
为科学合理地进行陕西省咸阳市城区地下水开采、水位预报以及地面沉降防治,文章在系统分析咸阳城区水文地质条件的基础上,确定了研究区范围、边界条件以及相关的水文地质参数,利用地下水流模拟软件Visual Modflow建立研究区数值模型,并根据实测点的动态水位资料对模型进行参数识别和验证,利用识别验证后的模型预测了咸阳城区潜水水位的变化趋势,结果表明,在现状开采条件下,研究区潜水处于负均衡状态,均衡差为-37m3·d-1,在线性增加开采条件下,研究区东北部潜水水位持续下降,降落漏斗有扩大趋势,未来应加强对区域水资源开采的管控。该研究为潜水资源的开采、水文地质灾害防治以及土地工程相关业务的开展提供了科学的依据。
In order to scientifically and reasonably carry out the groundwater exploitation,water level forecast and ground settlement prevention in Xianyang of Shaanxi province,the numerical model of the study area is established with Visual MODFLOW,based on the systematic analysis of the hydrogeological conditions of confirmed study area,boundary condition and related hydrogeological parameters.The parameters of the model are identified and validated according to the dynamic water level data of the measured point.The trend of the phreatic water level in Xianyang city is predicted by the model.The result shows that under the condition of present mining,the phreatic water is in negative budget,and the value is-37 m3·d-1.Under the condition of linear increase mining,the phreatic level of the northeast of study area continues to decline and the cone of depression has a tendency to expend.It provides a scientific basis for future exploitation of phreatic resources,the prevention and control of hydrogeological hazards and the development of land engineering related business in the study area.
基金
陕西省重点科技创新团队计划项目(2016KCT-23)
