摘要
受气候变化和农业灌溉等多重因素影响,新疆平原区地下水储量变化机制复杂,目前关于该区域利用重力卫星技术探究大尺度地下水储量变化的研究尚不足。以新疆平原区为研究对象,本文基于GRACE卫星数据结合GLDAS模型数据,利用水量平衡方程结合Theil-Sen趋势分析、Mann-Kendall检验等方法,综合分析2003~2022年新疆平原区地下水储量时空变化特征。结果表明:(1)地下水储量整体有四个阶段均呈下降趋势。2003~2008年、2009~2013年、2014~2018年、2019~2022年的月均变化趋势分别为–0.58 mm/mon、–0.26 mm/mon、–0.11 mm/mon、–1.69 mm/mon。(2)地下水储量空间上呈不规则变化态势。昆仑山北麓山前平原区和阿尔泰山南麓部分地区稳定且呈现略增,为0~2mm/mon;其他区域呈现不同程度的减少。(3)整体地下水储量减小是气温升高和地下水开采增加共同作用的结果。研究成果可为大尺度区域开展地下水储量变化监测、分析和管理提供技术参考。
[Objective]Over the past three decades,the expansion of arable land and the increase in agricultural water consumption in the Xinjiang plain region have led to the over-exploitation of groundwater.This has consequently resulted in a range of issues,including but not limited to declining groundwater levels,reduced runoff,deteriorating water quality,land subsidence,and ecological degradation.The mechanism underlying changes in groundwater storage in the Xinjiang plain is complex.Both domestically and internationally,there have been relatively few studies on large-scale groundwater storage changes in this area.Therefore,it is essential to employ modern observational technology to objectively study the information on groundwater storage changes in this region.[Method]Investigating the spatial and temporal evolution of groundwater reserves in the Xinjiang plain region is crucial for ensuring the security of regional water resources,food supply,and ecological health.By utilizing GRACE satellite and GLDAS model data,which are well-known for their high accuracy and reliability in hydrological research,we estimated the alteration in groundwater storage in the Xinjiang plain from 2003 to 2022.Subsequently,we analyzed the spatial and temporal evolution of groundwater storage using methods such as the Theil-Sen slope,Mann-Kendall trend test,and grading of groundwater storage changes.This comprehensive analysis provides an understanding of the groundwater dynamics in the region.[Result]The results indicate that:(1)From 2003 to 2022,the overall groundwater reserves in the Xinjiang plain region exhibit a decreasing trend in four stages,with average monthly change trends of–0.58 mm/mon,–0.26 mm/mon,–0.11 mm/mon,and–1.69 mm/mon for the periods of 2003-2008,2009-2013,2014-2018,and 2019-2022,respectively.(2)There are irregular spatial changes;groundwater storage in the pre-mountain plain areas of the northern foothills of the Kunlun Mountain and parts of the southern foothills of the Altai Mountain remains stable or slightly increases(0-2 mm/mon).In contrast,the rest of the region experiences varying degrees of decline,with the Tianshan Mountains region’s pre-mountain plain area showing the most significant decrease(–3 mm/mon to–1 mm/mon),and the area affected by this decline increasing annually.The decrease is most pronounced in the plain area in front of the Tianshan Mountains(–3 mm/mon to–1 mm/mon),with the affected area expanding each year.(3)The slowdown in the decline of groundwater reserves during certain periods is related to the implementation of the“Three Red Lines”policy and measures to control groundwater over-exploitation.However,the overall decrease in groundwater reserves is attributed to the combined effects of rising temperatures and increased groundwater extraction for irrigation.[Conclusion]The research findings provide a scientific basis for monitoring,analyzing,and managing groundwater storage changes in large-scale regions.
作者
郑玮
郑刚
闫正龙
龚栋栋
韩方红
ZHENG Wei;ZHENG Gang;YAN Zhenglong;GONG Dongdong;HAN Fanghong(Xinjiang Water Conservancy and Hydropower Survey Design Institute Co.,Urumqi 830000,China;Tarim River Basin Management Bureau,Korla 84100,China;Shaanxi Bureau of Surveying,Mapping and Geoinformation,Xi’an 710054,China;School of Water Resources and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Key Laboratory of Water Conservancy Engineering Safety and Water Disaster Prevention and Control,Urumqi 830052,China)
出处
《时空信息学报》
2025年第2期193-202,共10页
JOURNAL OF SPATIO-TEMPORAL INFORMATION
基金
塔里木河流域管理局科研项目(TGJAKSJJG-2022KYXM0003,TGJGLJJG-2024KYXM0003)
国家重大科技项目(2021xjkk0203)
新疆水利工程安全与水灾害防治重点实验室开放课题(ZDSYS-JS-2022-03)
新疆维吾尔自治区重大科技专项项目(2023A02002-1)。
