基于地温示踪技术的地下水流速测算方法研究——以雷州半岛为例

项目名称： 基于地温示踪技术的地下水流速测算方法研究——以雷州半岛为例

项目编号： No.41501037

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 地质学

项目作者： 董林垚

作者单位： 长江水利委员会长江科学院

项目金额： 24万元

中文摘要： 人类活动和城市化进程加剧地下水资源消耗和水环境污染，引发环境、生态、地质等一系列链生灾害，对地下水资源进行科学评价和管理是解决上述问题的有效途径，准确测算地下水流速是地下水资源评价的基础。本课题基于地温示踪技术，按照“研制-实用-验证”的思路研发一种快速测算地下水流速的方法:修正利用地温分布推算地下水流速的理论，开发高效准确的地温自动化测量设备;对雷州半岛湛江地区地温进行实测，运用地质体温度场和渗流场耦合模型识别地下水入渗、排泄区，计算地下水流速;运用MODFLOW地下水水流运移软件模拟区域地下水流，基于此验证地温示踪技术测算地下水流速的准确性和合理性。研究旨在提出一种基于温度示踪技术的地下水流速测算方法，构建气候变化/城市化进程影响下地下水流的快速测评体系，为区域地下水资源科学管理以及城镇化过程和地下水流动对地温的影响研究提供理论依据和技术支撑。

中文关键词： NULL

英文摘要： The groundwater resource depletion and contamination was enhanced during urbanization processes, which are associated with the regional environmental, ecological and geological disasters. Scientific assessment and management on groundwater resource are the effective way to resolve this problem, while the detection of groundwater velocity is the basis of this issue. This research addresses to calculate the groundwater velocity using heat tracer. We modified the theory of subsurface temperature-depth profiles perturbation, and developed an effective heat monitor system to calculate the groundwater velocity according to the subsurface thermal distributions. The proposed approach was applied in Leizhou Peninsula to estimate the recharge, discharge and horizontal flow rates, and the MODFLOW software was also proposed to simulate the regional groundwater flow for comparative purpose. This research aims to reflect the influence of groundwater flowing to subsurface thermal regimes during urbanization process, construct the system of calculation of groundwater velocity based on subsurface temperature-depth profiles, and provide scientific guidance and practical support to investigate the impact of regional groundwater flowing and surface urbanization on subsurface thermal regimes.

英文关键词： Groundwater moverment;Groundwater resource assessment;Hydrological process observation;Hydrological simulation