摘要
[目的]评估降水对华北农业区地下水保障能力的影响,为该区地下水资源可持续利用提供理论依据。[方法]建立地下水保障能力(F)评价理论体系,采用地学统计、关联度分析等方法,分析降水对地下水保障能力影响的时空特征。[结果]①随降水量变化,F值空间分布变化明显,多年平均和丰水年以“基本保障”分布为主,枯水年则以“难以保障”为主;②随降水量变化,不同区位F发生频次亦不同。在燕山山前平原和太行—冀中平原,当降水频率分别>75%和>50%时,F值均在0.5以下;太行—豫北平原,当降水频率<75%时,F值升高至以大于1.0的频次为主;中部—豫北平原,当降水频率<50%时,F值均增大至1.0以上;当降水频率<25%时,中部—鲁北平原和滨海平原F值均增大至0.5以上,而中部—冀中平原只有少数年份F大于0.5。[结论]降水是影响地下水保障能力的重要因素,对平水年和枯水年仍为“较高保障”的区域可适当扩大农业种植规模,对丰水年为“难以保障”和“较低保障”的区域,应适当压缩农业种植规模。
[Objective]The impacts of precipitation on the groundwater preservation capacity for agricultural regions in North China were studied in order to provide a theoretical basis for the sustainable use of groundwater resources in this region.[Methods]We established a theoretical system for evaluating groundwater preservation capacity(F)and determined the influence of precipitation changes on F value in agricultural regions of North China using methods such as geoscience statistics and correlation analysis.[Results]①The spatial distribution of F value changed dramatically as precipitation changed.The multi-year average and wet years were dominated by the“basic guarantee”distribution,while the dry years were dominated by the“difficult to guarantee”distribution;②As precipitation changed,the frequency of F value also varied in different locations.In the Yanshan Plain and the Taihang-Hebei Plain,when the precipitation frequency was greater than 75%and 50%,respectively,the F value was less than 0.5;in the Taihang-Henan Plain,when the precipitation frequency was less than 75%,the F value was greater than 1.0;in the Central Henan Plain,when the precipitation frequency was less than 50%,the F value increased to 1.0;in the Central Shandong Plain and Littoral Plain,when the precipitation frequency was less than 25%,the F value was greater than 0.5;in the Central Hebei Plain,there were only a few years where the F value was greater than 0.5.[Conclusions]Precipitation is an important factor that affects groundwater preservation capacity.For areas that can be“highly preserved”even during normal and dry years,the scale of agricultural planting can be appropriately expanded to ensure ample food production.However,for areas that are“difficult to preserve”and have“lower preservation”capacity during wet years,the scale of agricultural planting should be appropriately reduced to alleviate the pressure of groundwater overexploitation.
作者
王电龙
张光辉
冯慧敏
狄帆
张西珠
杜旭婷
Wang Dianlong;Zhang Guanghui;Feng Huimin;Di Fan;Zhang Xizhu;Du Xuting(Department of Safety and Environmental Engineering,Taiyuan Institute of Technology,Taiyuan,Shanxi 030012,China;State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100086,China;Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang,Hebei 050800,China;College of Urban and Rural Construction,Shanxi Agricultural University,Taigu,Shanxi 030801,China;School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030002,China)
出处
《水土保持通报》
CSCD
北大核心
2023年第4期276-282,共7页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金项目“气候突变模式下华北农业区地下水保障能力响应特征”(4170226)
山西省高等学校科技创新项目(2021L559)
太原工业学院青年(后备)学科带头人支持计划项目(202104)。
关键词
降水变化
农业区
地下水
保障能力
华北平原
precipitation change
agricultural region
groundwater
preservation capacity
North China Plain
