基于地理探测器的河套灌区湖泊MNDWI时空变化及驱动力分析  

Environmental driving factors analysis of lake MNDWI index in Hetao irrigation area based on geographic detector

作　　者：王成坤 李瑞平[1,3] 王秀青 闫志远 苗庆丰[1] WANG Chengkun;LI Ruiping;WANG Xiuqing;YAN Zhiyuan;MIAO Qingfeng(Inner Mongolia Agricultural University,Hohhot 010018,China;Inner Mongolia Autonomous Region Surveying and Mapping Geographic Information Center,Huhhot 010050,China;State Key Laboratory of Water Engineering Ecology and Environment in Arid Area,Inner Mongolia Agricultural University,Huhhot 010018,China)

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018 [2]内蒙古自治区测绘地理信息中心,呼和浩特010050 [3]内蒙古农业大学旱区水工程生态环境全国重点实验室,呼和浩特010018

出　　处：《生态科学》2025年第1期100-107,共8页Ecological Science

基　　金：国家自然科学基金项目(51839006,52069021);内蒙古自然科学基金项目(2022MS05044);内蒙古自治区教育厅一流学科科研专项项目(YLXKZX-NND-010);内蒙古农业大学旱区水工程生态环境全国重点实验室(SQ2024SKL08048)。

摘　　要：为了探究河套灌区湖泊改进的归一化差异水体指数(MNDWI)时空变化及其驱动力,基于Google Earth Engine(GEE)平台提取的MNDWI遥感数据,采用趋势分析法探讨了2000—2019年河套灌区湖泊MNDWI时空变化特征,并用地理探测器模型对河套灌区湖泊MNDWI驱动力进行了研究。结果表明:(1)2000—2019年河套灌区湖泊MNDWI呈增加态势,平均上升幅度为0.006/年,季节变化特征明显。(2)近20年来面积呈增加趋势的湖泊超过半数,占比高达68.5%,主要分布在乌梁素海和河套灌区的西部。(3)河套灌区湖泊MNDWI空间差异主要受引水量、地下水埋深、人口分布、年平均气温、土地分类、年平均降水量和高程等因素影响,其因子解释力均超过30%,这表明这些因子是影响该区域内MNDWI空间分布的主导环境因子,而坡度和GDP对湖泊水体指数的解释力相对较弱;自然因子间的交互作用以双因子增强趋势为主,其中地下水埋深∩土地分类解释力最高,为0.746。In order to explore the spatial-temporal distribution changes and driving forces of improved normalized difference water index(MNDWI)for lakes in Hetao irrigation area,MNDWI remote sensing data extracted from Google Earth Engine(GEE)platform were used.The temporal and spatial variation characteristics of lake MNDWI in Hetao irrigation area from 2000 to 2019 were analyzed by trend analysis,and the explanatory power of lake MNDWI index was analyzed by geographic detector model.The results showed that:(1)Lake MNDWI in Hetao irrigation area increased from 2000 to 2019,with an average increase of 0.006/a and obvious seasonal variation.(2)In the past 20 years,the proportion of lakes in the Hetao irrigation area improved significantly,68.5%of which showed an increasing trend,mainly distributed in Wuliangsuhai and the western lakes in the Hetao irrigation area.(3)The spatial differences of lake MNDWI in Hetao irrigation area were mainly determined by water diversion,groundwater depth,population distribution,annual mean temperature,land classification,annual mean precipitation and elevation,with explanatory power of more than 30%,indicating that these factors were the dominant environmental factors affecting the spatial distribution of MNDWI in Hetao irrigation area.Slope and GDP had the weakest explanatory power on lake water index.The interaction between the natural factors is mainly double-factor enhancement trend,and the interpretation power of groundwater depth∩land classification is the highest 0.746.

关 键 词：河套灌区湖泊 地理探测器模型 驱动因子 改进的归一化差异水体指数 

分 类 号：F205[经济管理—国民经济] TP181[自动化与计算机技术—控制理论与控制工程]