基于InVEST模型的磴口县生态系统服务评估

发布时间：2018-04-01 19:29

本文选题：磴口县　切入点：生态系统服务　出处：《内蒙古农业大学》2017年硕士论文

【摘要】：生态系统服务评估有助于人类了解生态系统的开发潜力,实现科学开发与利用,相关研究已成为国际地学和生态学的研究热点。国外常利用各类物质量模型评估生态系统服务,近些年也逐渐成为我国生态系统服务评估的主要方法。本文基于遥感及第二次全国土地调查变更数据,分析2015年磴口县土地利用情况,并利用InVEST模型,对碳贮存、土壤保持、产水量三项服务进行评估,并对其空间关系、与各类环境因子的关系、相互之间的权衡或协同关系进行识别与分析,为磴口县生态系统的保护与管理提供理论依据。主要结论如下:(1)磴口县总面积367627hm2,主要地类为天然草地(26.56%)、裸地(17.98%)、沙地(17.12%)、水浇地(14.79%)。(2)2015年磴口县碳贮存量为7.47× 107kg,平均碳密度为20.30 g · m2,主要分布于天然牧草地(29.61%)、沙地(28.25%)、裸地(18.14%);土壤保持量为1.97×107t,平均单位土壤保持量为5.45kg·m-2,集中分布于裸地(94.07%);产水量为1.10×107m3,平均单位面积产水量为3.00mm,主要分布于天然牧草地(28.39%)、裸地(24.78%)、沙地(20.16%)。(3)碳贮存服务热点分布在西北、中部及西南地区;土壤保持服务热点区域不明显,零星分布在西北地区;产水量服务热点分布在中部、西部及西南部区域,但面积较小。(4)磴口县各主要地类中碳贮存服务主要与土壤因素显著相关;土壤保持服务主要与地形因素显著相关;产水量服务主要与植被盖度及植被可利用有效水分含量显著相关。(5)土壤保持服务与碳贮存服务、土壤保持服务与产水量服务之间均表现为协同关系,碳贮存服务与产水量服务为权衡关系。
[Abstract]:Ecosystem service assessment is helpful for human beings to understand the potential of ecosystem development and realize scientific development and utilization. The related research has become a hotspot in international geoscience and ecology. In recent years, it has gradually become the main method of ecosystem service assessment in China. Based on the data of remote sensing and the change of the second national land survey, this paper analyzes the land use situation in Dengkou County in 2015, and uses InVEST model to store carbon and conserve soil. Three services of water production are evaluated, and their spatial relationships, relationships with various environmental factors, trade-offs or synergies between them are identified and analyzed. The main conclusions are as follows: Dengkou County has a total area of 367627hm2.The main land types are natural grassland 26.5656g, bare land 17.98g, sandy land 17.12g, irrigated land 14.797.795) Dengkou County carbon storage 7.47 脳 107kg, average carbon density 7.47 脳 107kg in 2015. The degree is 20.30 g m2, mainly distributed in natural forage land (29.61m ~ (-2)), sand land is 28.25m ~ (-1), bare land is 18.14m ~ (-1), soil conservation is 1.97 脳 10 ~ (7) t, average soil conservation is 5.45kg m ~ (-2), it is mainly distributed in bare land (94.07m ~ (-2)), water yield is 1.10 脳 10 ~ (7) m ~ (3), average water yield per unit area is 3.00 mm. The hot spots of carbon storage services are distributed in the northwest of China, where natural forage land is 28.39, bare land is 24.78, and sand is 20.16. Central and southwest regions; soil conservation service hot spots are not obvious, scattered in the northwest region; water production service hot spots in the central, western and southwest regions, In Dengkou County, carbon storage services were mainly related to soil factors, soil conservation services were mainly related to topographic factors. Water yield service was mainly related to vegetation coverage and available water content of vegetation. 5) soil conservation service and carbon storage service, and there was a synergistic relationship between soil conservation service and water yield service. Carbon storage services and water production services are trade-offs.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X826

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