察汗淖尔干湖床点尺度非饱和带降水入渗补给研究  

Study on precipitation recharge in point scale unsaturated zone of dry lake bed of Chahannaoer

作　　者：孙季珲 于一雷 张兵[1,2] 韦欣[3,4,5] 杨洪国 张義 SUN Jihui;YU Yilei;ZHANG Bing;WEI Xin;YANG Hongguo;ZHANG Yi(Tianjin Key Laboratory of Water Resources and Water Environment,Tianjin Normal University,Tianjin 300387,China;School of Geog-raphy and Environmental Science,Tianjin Normal University,Tianjin 300387,China;Xiongan Institute of Innovation,Chinese Academy of Sciences,Xiongan New Area 071899,Hebei Province,China;Institute of Ecological Protection and Restoration,Chinese Academy of Forestry/Beijing Key Laboratory of Wetland Ecological Function Restoration,Beijing 100091,China;School of Ecological Environ-ment,Institute of Disaster Prevention,Langfang 065201,Hebei Province,China;Geological Institute of China Chemical Geology and Mine Bureau,Beijing 100101,China)

机构地区：[1]天津师范大学天津市水环境与水资源重点实验室,天津300387 [2]天津师范大学地理与环境科学学院,天津300387 [3]中国科学院雄安创新研究院,河北雄安新区071899 [4]中国林业科学研究院生态保护与修复研究所/湿地生态功能与恢复北京市重点实验室,北京100091 [5]防灾科技学院生态环境学院,河北廊坊065201 [6]中化地质矿山总局地质研究院,北京100101

出　　处：《天津师范大学学报（自然科学版）》2024年第6期45-53,共9页Journal of Tianjin Normal University：Natural Science Edition

基　　金：中央级公益性科研院所基本科研业务费专项资金资助(CAFYBB2021YJ001);国家林业和草原局重点课题(2021ZDKT008).

摘　　要：为深入了解半干旱区降水入渗补给的规律,基于张家口市尚义县气象站点降水数据和采样点土壤性质,采用稳定同位素、Mann-Kendall(M-K)趋势检验法和氯离子质量平衡法(CMB)等方法分析察汗淖尔干湖床的降水入渗补给速率.结果表明:①研究区土壤1.4 m深度以上为混合层,土壤水主要运动方式为优先流,土壤含水率变幅较大且呈显著增加趋势;1.4 m深度以下为稳定层,土壤水主要运动方式为活塞流,土壤含水率无显著变化.土壤水氯离子质量浓度随深度增加先显著降低后增加,整体无明显变化.②土壤1.0 m深度处存在2011年的降水入渗补给信号;1.6 m处存在2009年的降水入渗补给信号;3.0 m处存在2006—2007年的降水入渗补给信号.③土壤水剖面平均记录密度约为2.60 a/m,降水入渗补给速率约为0.15~0.19 mm/a,年均降水入渗补给量占多年平均降水量的0.03%~0.05%.In order to obtain a deeper understanding of the patterns of precipitation recharge in semi-arid areas,based on pre-cipitation data from the meteorological station in Shangyi County,Zhangjiakou and soil properties at sampling points,stable isotope,Mann Kendall(M-K)trend test,and chloride ion mass balance method were used to analyze the rate of precipitation recharge of the dry lake bed of Chahannaoer.The results showed that:①The soil above a depth of 1.4 m was a mixed layer,and the main movement mode of soil water was preferential flow,and the soil moisture content varied greatly and showed a significant increasing trend.The soil below a depth of 1.4 m was the stable layer,and the main movement mode of soil water was piston flow,and there was no significant change in soil moisture content.As the soil depth increase,the mass concentra-tion of chloride ions in soil water first decreased significantly and then increased,with no significant change overall.②There were a precipitation recharge signal from 2011 at a depth of 1.0 m in the soil,a precipitation recharge signal from 2009 at a depth of 1.6 m,and a precipitation recharge signal from 2006 to 2007 at a depth of 3.0 m.③The average recorded density of the soil water profile was about 2.60 a/m,and the rate of precipitation recharge was about 0.15-0.19 mm/a,accounting for 0.03%-0.05%of the average annual precipitation.

关 键 词：察汗淖尔干湖床 降水入渗补给 稳定同位素 氯离子质量平衡法 非饱和带 

分 类 号：P641[天文地球—地质矿产勘探]