摘要
密云水库上游流域张承地区作为密云水库的水源涵养区,担负着向北京市提供饮用水源的重要任务,研究其土壤保持服务功能对实现区域高质量发展和保障首都的水生态安全具有重要意义.本文通过遥感解译分析了密云水库上流域张承地区2000—2019年的土地利用变化情况,在此基础上,基于InVEST泥沙输移比模型,从空间上定量评估了2000—2019年研究区的土壤保持服务功能分布及变化情况,并借助地理探测器对研究区土壤保持服务的主要影响因素进行地理探测分析.结果表明:(1)2000—2019年间密云水库上游流域张承地区土地利用类型以林地和草地为主,占整个研究区域的80%以上,且土地利用整体呈现耕地面积减少,林地、草地、建设用地不断增加的特点;(2)2000—2019年间研究区土壤侵蚀量呈先减少后增加的趋势,2000、2010、2019年三期的土壤保持总量分别为793.87×10^(6)t、564.53×10^(6)t和602.73×10^(6)t;(3)研究区土壤保持服务功能的时空变化主要受土地利用类型和坡度两个因素的影响,研究区内土壤保持量随坡度的增加而增大,各地类土壤保持能力由强到弱依次为:林地、草地、裸地、耕地、建设用地、水域.
As the water source conservation area of Miyun Reservoir,Zhangcheng area in the upper reaches of Miyun Reservoir bears the important task of providing drinking water to Beijing.The study of soil conservation service in Zhangcheng water source conservation area is of great significance to the high-quality development and ensuring the water ecological security of the capital.Based on the remote sensing the land use change in Miyun Reservoir upstream basin of Zhangcheng area were interpreted and analysised from 2000 to 2019,on this basis,based on InVEST sediment delivery ratio model the spatial distribution and change of soil conservation service in the study area from 2000 to 2019 were quantitatively evaluated,and analyzed the main influencing factors of soil conservation service in the study area by using spatial geographic detector.The results showed that:(1)From 2000 to2019,the land use types of Miyun Reservoir upstream basin of Zhangcheng area are mainly forest land and grassland,witch account for more than 80%,and the overall land use in the study area was characterized by the decrease of plow land,and the increase of forest land,grassland and construction land;(2)From2000 to 2019,the soil erosion in the study area showed the trend of first decrease then increase,the total soil conservation of the study area in 2000,2010 and 2019 was 793.87×10^(6)t,564.53×10^(6)t and 602.73×10^(6)t;(3)The spatiotemporal variations of soil conservation services in the study area was mainly affected by land use type and slope,the amount of soil conservation in the study area increased with the increase of slope,the soil conservation ability of different land use types strong to weak is:forest land,grass land,bare land,plow land,construction land,and water area.
作者
张薇
王凤春
万虹麟
张丽军
李志梅
王晗旭
ZHANG Wei;WANG FengChun;WAN HongLin;ZHANG LiJun;LI ZhiMei;WANG HanXu(Hebei University of Water Resources and Electric Engineering,Cangzhou 061001,China;Cangzhou Technology Innovation Center of Remote Sensing and Smart Water,Cangzhou 061001,China;Hebei University Center for Water Automation and Information Application Technology,Cangzhou 061001,China;Hebei Technology Innovation Center of Phase Change Thermal Management of Data Center,Cangzhou 061001,China;Hebei Key Laboratory of Geotechnical Engineering Safety and Deformation Control,Cangzhou 061001,China;Yanqing District Water and Soil Conservation Management Station of Beijing Municipality,Beijing 102199,China)
出处
《地球物理学进展》
CSCD
北大核心
2022年第6期2339-2350,共12页
Progress in Geophysics
基金
河北省省级科技计划软科学研究专项(20557682D)
河北省高等学校科学技术研究项目(ZC2021237)
河北省高等学校科学技术研究项目(ZC2021237,ZD2020348)联合资助
河北省教育厅省级大学生创新训练项目(S202110085034)。
关键词
InVEST模型
土壤保持
地理探测器
密云水库上游
InVEST model
Soil conservation
Spatial geographic detector
Miyun Reservoir upstream basin
