基于InVEST模型的渭河流域干支流生态系统服务时空演变特征分析
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李子(1995-),女,硕士研究生,主要从事生态、遥感方面的研究。E-mail:1436052688@qq.com

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X826

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国家社会科学基金项目"中国丝绸之路经济带生态文明建设评价与路径研究"(14XKS019)


Spatiotemporal Evolution of Ecosystem Services in the Main and Tributaries of Weihe River Basin Based on InVEST Model
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    摘要:

    渭河作为黄河的最大支流,是生态保护建成区重点之一,对其生态系统服务研究有利于实现流域内高质量发展和生态保护之间的平衡关系,保持流域生态系统服务功能,促进流域生态系统恢复。基于InVEST模型分析渭河流域2000—2018年5期土地利用和干支流生态系统服务时空动态变化,采用相关性分析水源涵养、土壤保持和生物多样性之间的权衡和协同。结果表明:19年间,研究区土地利用情况主要以耕地、草地和林地为主,占总面积的95%以上。流域内水源涵养呈现"先上升后下降"趋势,平均栅格单元产水量542.9 mm,渭河流域干流水源涵养量最高,为6.88×108 m3,其次为北洛河和泾河流域,分别为3.36×108,5.04×108 m3。土壤保持呈斑块状分布,流域整体土壤侵蚀状况为微度侵蚀,且渭河流域干流实际土壤侵蚀量总量最高为6.67×108 t,其次为北洛河和泾河流域,分别为6.22×108,3.13×108 t。生物多样性表现为生境质量高区集中分布在生态较好的森林生态保护区,人类活动较为密集地区生境质量较差。研究期间,渭河流域水源涵养与土壤保持、生态质量之间为高度协同关系,其他生态系统服务不显著,不同的土地利用类型对生态系统服务之间权衡和协同贡献值不一致。

    Abstract:

    Weihe River basin, as the largest tributary of the Yellow River basin, is one of the key ecological protection built-up areas. The study on ecosystem services is conducive to the realization of the balance between high-quality development and ecological protection in the basin, to the maintenance the ecosystem service function of the basin, and to the promotion the restoration of the basin ecosystem. Based on the InVEST model, this paper analyzed the spatial-temporal dynamic changes of land use and ecosystem services of main and tributaries in the Weihe River basin from 2000 to 2018, and used correlation analysis to analyze the trade-offs and synergies among the balance of water conservation, soil conservation, and biodiversity. The results showed that the land use in the study area was mainly cultivated land, grassland, and forest land, accounting for more than 95% of the total area. Water conservation in the basin showed a trend of "increasing first and then decreasing", with an average grid unit yield of 542.9 mm. The water conservation in the Weihe River basin was higher than that in Jing River basin and Beiluo River basin, which were 6.88×108, 5.04×108, 3.36×108 m3. The soil in the basin remained patchy and the overall soil erosion status of the basin was slight. Moreover, the soil erosion in the main stream of Weihe River basin was greater than that in Jing River basin and Beiluo River basin, which were 6.67×108, 3.13×108, 6.22×108 t. The biodiversity showed that the areas with high habitat quality were concentrated in the forest ecological protection areas with good ecology and the habitat quality was poor in the areas with dense human activities. During the study period, there was a highly synergistic relationship between water conservation, soil conservation, and ecological quality in Weihe River basin, while other ecosystem services were not significant. It can be seen from the correlation that different land use types have different values of tradeoffs and collaborative contributions to ecosystem services.

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李子, 张艳芳.基于InVEST模型的渭河流域干支流生态系统服务时空演变特征分析[J].水土保持学报,2021,35(4):178~185

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  • 收稿日期:2021-03-09
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  • 在线发布日期: 2021-07-20
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