摘要
地下水资源已日益成为半干旱地区维持生态系统的重要因素,了解土地利用/覆被变化(LUCC)及其对地下水埋深的影响,将有助于管理典型农牧交错带的土地和地下水资源。基于通辽平原区的1980年、1990年、1995年、2000年、2005年、2010年及2015年地下水埋深和土地利用类型遥感数据,分析研究区地下水埋深与土地利用类型变化响应关系。研究发现,通辽平原区1980-1995年期间,耕地和建筑用地面积分别增加14.90%和22.77%,而草地面积相应减少13.36%,农田开垦和城镇化进程明显;1995-2015年期间,研究区耕地和草地面积无明显变幅,该时期变化最大的为水域,面积减少了约19.93%,干旱趋势加剧。与此同时,研究区地下水埋深值呈显著增加趋势,在区域中部形成两个地下水超采区,平均地下水埋深值由1980年的2.39 m增加至2015年的6.23 m。区域土地利用类型与地下水的时空变化关系较为明显,土地利用类型是地下水埋深变化的重要驱动力之一,研究区耕地扩张和城镇工业经济发展对地下水埋深影响显著。
Groundwater resources are becoming the primary factor for maintaining life in arid areas.Understanding land use/cover change and its effect on groundwater depth would enhance land use and groundwater management for typical agro-pastoral ecotone.Based on the data of groundwater depth and the remote sensing of land use types in 1980,1990,1995,2000,2005,2010 and 2015,the change characteristics of land use types in the study area and its influence on the groundwater depth are analyzed.The study indicates that:during 1980 and 1995,the area of cultivated land and built up land increased by 14.90%and 22.77%,respectively while the grassland area decreased by 13.36%.It shows that the process of farmland reclamation and urbanization is obvious.Between 1995 and 2015,the area of cultivated land and grassland did not show a significant change in the study area.At the same time,the groundwater depth increased significantly,and two groundwater overland areas were founded in the middle of the region.The average groundwater depth increased from 2.39m in 1980 to 6.23m in 2015.The relationship between the type of land use and the spatio-temporal change of groundwater is more obvious.The type of land use is one of the important driving forces of groundwater depth change.The expansion of cultivated land and the development of industrial economy in the study area have a significant influence on the groundwater depth.
作者
孙标
朱永华
张生
史小红
田伟东
刘志强
云腾
SUN Biao;ZHU Yong-hua;ZHANG Sheng;SHI Xiao-hong;TIAN Wei-dong;LIU Zhi-qiang;YUN Teng(College of Water Conservation and Civil Engineering,Inner Mongolia Agricultural University,Huhhot 010018,China;Water Conservancy Planning and Design Research Institute Tongliao,Tongliao 028000,Inner Mongolia,China;Hydrology Survey Bureau,Xilinguole Meng,Inner Mongolia,Xilinhaote 026000,Inner Mongolia,China)
出处
《中国农村水利水电》
北大核心
2019年第8期15-19,25,共6页
China Rural Water and Hydropower
基金
水利部公益性行业科研专项(201501031)
国家自然科学基金项目(51339002、51569019)
内蒙古自然科学基金项目(2016MS0406、2017BS0510)
