基于土地利用变化的典型喀斯特城市流域生态系统服务功能研究
Ecosystem Service Functions of a Typical Karst Urban Basin based on Land Use Change
李月 1耿华彩 1吴路华 2罗光杰 3陈飞4
作者信息
- 1. 贵州财经大学公共管理学院,贵阳 550025
- 2. 铜仁学院经济管理学院,贵州铜仁 554300
- 3. 贵州师范学院贵州省流域地理国情监测重点实验室,贵阳 550018
- 4. 贵州省水利科学研究院 贵阳 550002
- 折叠
摘要
揭示喀斯特城市流域土地利用对生态系统服务功能的影响机制,对喀斯特地区的社会经济发展与生态环境保护具有重要意义.本研究以贵州典型喀斯特城市流域—南明河流域为例,基于Arc GIS技术平台揭示了2000-2020 年3个时期流域的土地利用时空演变规律,采用In VEST模型对流域不同土地利用类型的生态系统服务功能进行了系统评价.结果表明:(1)流域土地利用以林地、耕地和草地为主,土地利用变化方式主要表现为建设用地的增长,增长了 13.07%;(2)流域水源涵养功能显著提升,碳储存功能略微减弱,空间上两者的物质量均呈现东北高、西南低的分布特征;(3)林地对流域水源涵养和碳储量的贡献率均超过57%,林地转为建设用地,耕地转为林地分别是生态系统服务功能减弱和增强的两种土地利用变化形式.本研究可为喀斯特生态脆弱区土地利用结构优化、水土资源开发和生态系统可持续管理提供重要数据支撑与科学参考.
Abstract
Revealing the mechanism by which land use influences ecosystem service function in karst urban wa-tersheds is of great significance for social and economic development and ecological environmental protection.In this study,the Nanming River Basin,a typical karst basin in Guizhou Province,was used as an example.The spa-tiotemporal dynamic changes in land use in the basin during three periods from 2000 to 2020 were analyzed using ArcGIS,and the ecosystem service functions of the different land use types in the basin were evaluated using an integrated valuation of ecosystem services and tradeoffs(InVEST)model.This analysis led to three outcomes.(1)Forest,cultivated land,and grassland make up most of the land uses.The land use change was mostly dependent on the growth of construction land,which expanded by 13.07%.(2)The watershed's water conservation function was significantly boosted during the study period.In contrast,the carbon stock function became slightly impaired,and the physical quality of both was regionally distributed as high in the northeast and low in the southwest.(3)The contributions of forest to total water conservation and carbon stock of the watershed are always the greatest,ex-ceeding 57%,and the conversions of forest to construction land and cultivated land to forest are the two primary types of land use change in which the ecosystem service function was impaired and strengthened,respectively.The results of this study can provide important data support and scientific reference for land use structure optimi-zation,soil and water resource exploitation,and sustainable ecosystem management in ecologically fragile areas.
关键词
喀斯特/城市流域/土地利用/In/VEST模型/生态系统服务功能Key words
karst/urban basin/land use/InVEST model/ecosystem service functions引用本文复制引用
基金项目
Youth Talent Growth Project of Guizhou Provincial Department of Education(Qian Jiao He KY[2022]202)
Guizhou Provincial Basic Research Program(Natural Science)([2020]1Y157)
Guizhou Provincial Program on Commercialization of Scientific and Technological Achievements([2022]010)
贵州省科技计划(ZK[2023]-464)
Scientific Research Projects in Higher Education Institutions of Guizhou Provincial Department of Education(Youth Project)(2022-351)
Water Conservancy Science and Technology Funding Projects in Guizhou Province(KT202223)
Water Conservancy Science and Technology Funding Projects in Guizhou Province(KT202316)
Water Conservancy Science and Technology Funding Projects in Guizhou Province(KT202323)
出版年
2024
NETL
NSTL
维普
万方数据