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2005-2017年焉耆盆地平原区地下水时空演变规律及其与土地利用的关系
章文亭1,2, 杨鹏年1,2, 彭亮1,2, 王环波1,2, 周龙1,2, 李晴1,2, 玉素甫江·如素力3
1.新疆农业大学 水利与土木工程学院, 新疆 乌鲁木齐 830052;2.新疆水利工程安全与 水灾害防治重点实验室, 新疆 乌鲁木齐 830052;3.新疆师范大学 地理科学与旅游学院, 新疆 乌鲁木齐 830054
摘要:
[目的] 分析2005-2017年焉耆盆地平原区土地利用变化与地下水总溶解固体物TDS之间的关系,为地下水可持续利用和生态环境发展提供依据。[方法] 利用GIS软件对焉耆盆地平原区2005,2014,2017年的Landsat-TM/ETM和Landsat 8的CNLUCC数据进行重分类,将土地分为耕地、林地、草地、水域、城镇建设用地和未利用土地6大类;通过对232组地下水水样的采集和分析,借助地统计和叠加分析模块研究焉耆盆地的TDS时空分区特征。[结果] 焉耆盆地平原区以耕地、水域和未利用土地为主,占总面积的60%以上;2014年耕地TDS均值的含量最高为708.6 mg/L,林地TDS均值的含量最低为680.4 mg/L;2017年城镇建设用地TDS均值的含量最高为521.6 mg/L,未利用土地TDS均值的含量最低为477.4 mg/L。[结论] 2017年各土地利用类型的TDS均值含量都低于2014年,是源于水域面积增加导致地下水补给量增加、耕地扩张的速度减缓及地下水径流积极循环带的淡化作用。
关键词:  焉耆盆地  土地利用变化  GIS  叠加分析  TDS含量
DOI:10.13961/j.cnki.stbctb.2021.01.038
分类号:X523;F301
基金项目:2020年新疆自然基金项目“基于多源数据的规模化节水灌区定量分析水盐时空分异特征”(2020D01A54);国家自然科学基金项目NSFC-新疆联合基金“变化环境下干旱区湖泊流域水—生态—经济复合”(U1703341)
Spatiotemporal Evolution of Groundwater and Its Relationship with Land Use in Plain Area of Yanqi Basin During 2005-2017
Zhang Wenting1,2, Yang Pengnian1,2, Peng Liang1,2, Wang Huanbo1,2, Zhou Long1,2, Li Qing1,2, Yusufujiang·Rusuli3
1.College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China;2.Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters Prevention, Urumqi, Xinjiang 830052, China;3.Institute of Geographical Science and Tourism, Xinjiang Normal University, Urumqi, Xinjiang 830052, China
Abstract:
[Objective] The relationship between land use change and groundwater total dissolved solids (TDS) in the Yanqi Basin plain from 2005 to 2017 was analyzed to provide a basis for the sustainable use of groundwater and ecological environment development.[Methods] Geographic information system software was used to reclassify the CNLUCC data of Landsat-TM/ETM and Landsat 8 in the Yanqi Basin plain area in 2005, 2014, and 2017. The land was divided into six categories:cultivated land, forest land, grassland, water area, urban construction land, and unused land. A total of 232 sets of groundwater samples collected from the Yanqi Basin were analyzed, and geostatistical methods and overlay analysis modules were used to study the characteristics and spatial distribution of total groundwater dissolved in the study area.[Results] The plain area of the Yanqi Basin was dominated by cultivated land, water, and unused land, accounting for more than 60% of the total area. In 2014, the highest average TDS content of cultivated land was 708.6 mg/L, and the lowest average TDS content of woodland was 680.4 mg/L. In 2017, the highest average TDS content of urban construction land was 521.6 mg/L, and the lowest average TDS content of unused land was 477.4 mg/L.[Conclusion] The average TDS content of each land use type in 2017 was lower than that in 2014, which is because the increase in water area that led to an increase in groundwater replenishment, a slowdown in the expansion of cultivated land, and the desalination of groundwater runoff active circulation zones.
Key words:  Yanqi Basin  land use change  geographic information system (GIS)  overlay analysis  total dissolved solids content