摘要
地下水是支撑西辽河平原区社会经济发展及生态安全的核心因素。为探索该区地下水埋深变化的趋势及导致其变化的诱因,分析了30年间地下水埋深的演变规律及趋势,并根据水量平衡原理确定了影响研究区水资源补排关系的主导因素。结果表明：2000年以前该区地下水各项补水量充足,灌溉用水为主的排泄量小于补给量,地下水资源能够达到补排均衡,埋深处于稳定状态。2000~2009年的年均降雨量仅是上20世纪90年代的75.9%,地下水的各项补给量都显著减少,补排均衡条件下的地下水可开采量明显下降;此阶段的灌溉农业却已经发展到较高的程度,农业灌溉用水一直保持在较高水平,地下水补排均衡被打破。水资源系统质量下降及全球气候演变导致地下水各项补给均有不同程度的减少以及地下水持续多年的大幅开采,是导致该区域地下水埋深持续增加的主导因素。因此,除了继续提高节水水平,减少水资源开发利用以外,还需要开展一系列的举措解决区域水资源供需矛盾问题。
Groundwater is the key factor that supports the social and economic development and ecological security of West Liaohe Plain area. In order to determine the change trend of groundwater depth in the region and the dominant factors, we analyzed the evolution trend of groundwater depth, determining the dominant factor affecting the relationship between water recharge and discharge in the area according to the principle of water balance. The groundwater recharge before 2000 was abundant, with irrigation water discharge less than recharge, thus groundwater balance was achieved and the groundwater depth was maintained. Average annual precipitation from 2000 to 2009 was only 75.9% in the 1990 s, and the recharge of groundwater was significantly reduced, with discharge of groundwater that could be mined being decreased obviously under the condition of the balance of discharge and recharge. However, the irrigated area had developed to a higher level at that stage, and irrigation water had maintained at a higher level, thus the drainage of groundwater balance was broken. Therefore, groundwater recharge reduced to some extent that caused by the decrease of water resources system quality and global climate change, which combined with the large mining of groundwater for several years, leading to the increasing of groundwater depth. In order to solve the contradiction between supply and demand of regional water resources, we not only need to improve the level of water utilization, reduce water consumption, but also need to enhance the capacity of solving the problems as it comes up.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2016年第3期327-333,共7页
Journal of Shenyang Agricultural University
基金
水利部公益性行业科研专项(1261530110115)
辽宁省教育厅项目(L2014268)
关键词
地下水埋深
影响因素
灌溉农业发展
降雨
groundwater depth
influence factor
development of irrigated agriculture
precipitation
