地质科技通报2024，Vol.43Issue(2)：268-282,15.DOI:10.19509/j.cnki.dzkq.tb20220477
北方岩溶区降水入渗补给系数及补给机制:以羊庄岩溶水系统为例
Recharge coefficients and recharge mechanisms of precipitation to ground-water in karst areas of North China:A case study of Yangzhuang karst water system
摘要
Abstract
[Objective]To establish a series of hydrogeological parameter for karst areas in North China,an on-site experimental study on water balance has been carried out since the 1980s in a closed spring-drainage karst wa-ter system in Yangzhuang,Shandong Province.[Methods]Based on long-term field observations of water balance elements spanning more than 40 years,the formulas for calculating precipitation infiltration recharge coefficients in bare,semi-covered and covered karst areas were derived.The correlation equations of the precipitation infiltration recharge coefficient α with precipitation P and water table depth D,as well as the series of adjustable maximum precipitation infiltration recharge coefficients in karst areas,were also established.The processes of precipitation infiltration and recharge and the mechanism of α change were explored.[Results]The results showed that α varied with D.Each rainfall segment P corresponded to a maximum precipitation infiltration recharge coefficient αmax and a maximum precipitation infiltration recharge volume,namely,the recharge limit Gmax,while the corresponding depth of water table was the optimal depth of water table Dcritical.When D was greater than Dcritical,the interception of the vadose zone increased with increasing water table depth and α was less than αmax.When D was less than Dcritical,the surface runoff increased with decreasing water table depth and α was less than αmax.Different rainfall segments cor-responded to different Dcritical,and the corresponding αmax and Dcritical increased with increasing precipitation.At any water table depth,Gmax was constant and equal to the difference between the critical rainfall of saturation excess runoff and the maximum interception volume of vadose zone.[Conclusion]This study addressed the key scientific issues related to precipitation infiltration recharge in karst areas and improved the research level of karst water re-sources in North China.关键词
岩溶水系统/包气带截留量/蓄满产流量/降水入渗补给系数/补给机制/羊庄盆地/北方岩溶区Key words
karst water system/vadose zone interception/saturation excess runoff/precipitation infiltration re-charge coefficient/recharge mechanism/Yangzhuang Basin/karst areas of North China分类
天文与地球科学引用本文复制引用
康凤新,郑婷婷,冯亚伟,徐秋晓,刘彬涛,王义生,李传谟..北方岩溶区降水入渗补给系数及补给机制:以羊庄岩溶水系统为例[J].地质科技通报,2024,43(2):268-282,15.基金项目
国家自然科学基金项目(42072331 （）
U1906209) （）
泰山学者工程专项经费(tstp20230626) （tstp20230626）
