基于HYDRUS模型水库土壤污染模拟与处置方案研究

Study on Simulation and Disposal of Soil Pollution in Reservoir based on HYDRUS Model

王庆坨水库选址区域原为农业、工业混合用地,存在土壤污染隐患,对南水北调输水水质安全产生不利影响。对水库建设期污染土壤修复工作进行总结,结合库区地质勘察与污染源调查,应用HYDRUS-1D模型模拟土壤重金属污染特性,并基于模拟结果提出修复措施。实践结果表明,该结果较为准确,有效缩短了污染处置周期,避免了传统多点钻孔取样法对水库隔水层的破坏,降低了水库渗漏风险,有利于确保水质安全。

The site of Wangqingtuo Reservoir was originally a mixed land-use of agriculture and industry which has potential soil pollution hazards with adverse impact on the water quality safety of the South-to-North Water Diversion Project.In this paper,the remediation work of contaminated soil during the reservoir construction period is summarized.Combined with the geological investigation and pollution source investigation of the reservoir area,the HYDRUS-1D model is applied to simulate the characteristics of heavy metal pollution in soil,and the remediation measures are proposed based on the simulation results.The practical result shows that the result is accurate,which effectively shortens the pollution disposal cycle,avoids the damage of the traditional multi-point borehole sampling method to the reservoir aquiclude,reduces the risk of reservoir leakage,and is conducive to ensuring the safety of water quality.