地下水深埋条件下土壤给水度的测定——以古尔班通古特沙漠南缘为例  

Determination of soil specific yield under the condition of deep buried groundwater:A case study in the southern edge of Gurbantunggut desert,China

作　　者：陈永宝 胡顺军[2] 雷磊 徐圣 刘海 张书杰 张巧丽 徐志华 Chen Yongbao;Hu Shunjun;Lei Lei;Xu Sheng;Liu Hai;Zhang Shujie;Zhang Qiaoli;Xu Zhihua(Hubei Institute of Metallurgical Geology(Central South Institute of Metallurgical Geology),Yichang 443003,Wuhan,China;State Key Laboratory of Desert and Oasis in Xinjiang Institute of Ecology and Geography,Chinese Academic of Sciences,Urumqi 830011,Xinjiang,China)

机构地区：[1]湖北冶金地质研究所(中南冶金地质研究所),湖北宜昌443003 [2]中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,新疆乌鲁木齐830011

出　　处：《地理科学》2025年第2期449-458,共10页Scientia Geographica Sinica

基　　金：国家重点研发计划课题(2021YFD1900801);中南冶金地质研究所所控创新基金(2021002);新疆水利科技专项资金项目(XSKJ-2021-05)资助。

摘　　要：为研究地下水深埋条件下土壤给水度的变化规律,以古尔班通古特沙漠南缘为研究区域,采用野外原位观测的试验方法,测定了地表零通量条件下的完全给水度、蒸散发条件下的平均疏干给水度和侧向渗漏补给条件下的平均充水给水度,探讨了地下水埋深、入渗、蒸散发对给水度的影响。结果表明:(1)包气带剖面含水率法测定地下水深埋条件下的土壤给水度是可行的;(2)地表零通量条件下完全给水度μ随地下水埋深H的增大而增大,当地下水埋深超过毛管水最大上升高度时,完全给水度变化较小,可近似看作常数;(3)古尔班通古特沙漠南缘丘间地地下水埋深平均值为8.80 m,地表零通量条件下完全给水度等于0.36,蒸散发条件下的平均疏干给水度为0.13,侧向渗漏补给条件下的平均充水给水度为0.17。研究结果可为地下水深埋区土壤给水度的测定提供一种新的思路。To explore the variations of aeration zone soil specific yield under the condition of deep buried groundwater,The southern edge of Gurbantunggut Desert was taken as the research area by field in-situ observation.The complete specific yield under the condition of zero surface flux,the average releasing specific yield under the condition of evapotranspiration and the average charging specific yield under the condition of lateral leakage recharge were determined,and the effects of groundwater depth,infiltration and evapotranspiration on specific yield were discussed.Results showed that:1)It is feasible to determine the soil specific yield under the condition of deep buried groundwater by the zone of aeration section water content method.2)Under the condition of zero surface flux,the complete specific yieldμincreases with the increase of groundwater depth H.When the groundwater depth exceeds the maximum rising height of capillary water,the change of complete specific yield is small and can be approximately regarded as a constant.3)The average groundwater depth of interdune land in the southern edge of Gurbantunggut Desert is 8.80 m.The complete specific yield under the condition of zero surface flux is 0.36,the average releasing specific yield under the condition of deep buried groundwater evaporation is 0.13,and the average charging specific yield under the condition of lateral leakage recharge is 0.17.The results of this study can provide a new idea for the determination of soil specific yield under the condition of deep buried groundwater.

关 键 词：给水度 地下水深埋区 土壤水分特征曲线 毛管水上升高度 干旱荒漠区 

分 类 号：P641.8[天文地球—地质矿产勘探]