吉林松嫩平原区地下水动态及其驱动因素分析

目的]为开展吉林松嫩平原区地下水动态研究提供理论依据。方法]分析了吉林松嫩平原区地下水动态及其驱动因素。结果]自20世纪60年代以来,吉林松嫩平原区气温逐渐升高,平均气温累计上升2℃;降水量逐渐减少,特别是西部地区降水量减少的趋势更加明显;同时地下水开采量不断增加,2008年达到28亿m3。在多种因素驱动下,区域地下水水位发生明显变化,潜水水位在西北部扇形地下降尤为明显,其他地区较为稳定,部分地区有所回升;承压水水位总体下降较快,个别地区有所回升。结论]研究区地下水环境的总体恶化趋势不可避免,但可通过制定科学规划、合理开采地下水资源来减缓恶化进程,实现区域地下水资源的可持续利用。

Analysis of the Groundwater System Change and Driving Factors in Songnen Plain in Jilin Province

Objective]The aim was to provide theoretical basis for the study of underground water dynamic changes in Songnei Plain in Jilin Province.Method]The dynamic changes and driving factors for the underground water in Songnei Plain in Jilin Province was expounded.Result]Since 1960s,the temperature in the Songnei Plain in Jilin Province increased gradually.The average temperature increased 2 ℃;precipitation reduced gradually.Especially,the trend of precipitation reduction in west area was more distinct;in the meantime,the development of underground water augmented gradually and reached 2 800 million m3 in 2008.Driven by many factors,regional underground water level had distinct changes.Potential water position reduced greatly in northwest fan-shaped area.The one in other places were stable and even increased in certain parts;confined water position decreased quickly in general and it increased in certain parts.Conclusion]The general deterioration trend of underground water environment was inevitable.But,the deterioration process can be eased through scientific planning and regional underground water resources so as to realize sustainable utilization of regional underground water resources.