基于InVEST模型的商洛市水土保持生态服务功能研究

发布时间：2018-11-26 08:08

【摘要】：以南水北调中线工程重要水源地商洛市为研究对象,采用生态系统服务和交易的综合评估模型(Integrated Valuation of Ecosystem Services and Trade-offs,In VEST)中的土壤保持模块(Sediment Retention Model),从水文角度对商洛市的地块截留、土壤侵蚀与土壤保持进行生态系统功能定量评估和空间异质性分析,进一步探讨该区在水库清淤和保证水质两种情境下的土壤保持效益与空间特征。结果表明:(1)商洛市潜在与实际土壤侵蚀量分别为1.21×109 t、3.4×107 t。该区整体处于轻度侵蚀与中度侵蚀级别,无极强度侵蚀。(2)全区输出的产沙总量为1.61×106 t,土壤保持总量为1.17×109 t,其中泥沙持留量为2.9×107 t。旬河、金钱河与乾佑河泥沙持留能力强。(3)In VEST模型评估排除死库容后在减轻泥沙淤积和保证水质治理花费两种情境下,土壤保持总价值分别为205.5亿元和616.3亿元。单位面积土壤保持价值量分别为313.6元hm~(-2) a~(-1)和824.1元hm~(-2) a~(-1)。
[Abstract]:Taking Shangluo City, an important water source of South-to-North Water transfer Project, as the research object, the soil conservation module (Sediment Retention Model),) of ecosystem services and trade model (Integrated Valuation of Ecosystem Services and Trade-offs,In VEST) is adopted. From the view of hydrology, the ecological system function and spatial heterogeneity of land block interception, soil erosion and soil conservation in Shangluo City were quantitatively evaluated and analyzed. The benefit and spatial characteristics of soil conservation in this area under two conditions of reservoir silt clearing and water quality assurance were further discussed. The results showed that: (1) the potential and actual soil erosion amounts in Shangluo were 1.21 脳 10 ~ 9 t ~ (3) 脳 10 ~ (7) t respectively. The whole area is in the level of mild erosion and moderate erosion. (2) the total sediment output is 1.61 脳 10 ~ 6 t, the total soil conservation is 1.17 脳 10 ~ 9 t, and the sediment retention is 2.9 脳 10 ~ 7 t. In Xunhe River, Qianhe River and Qianyou River, the total value of soil conservation was 20.55 billion yuan and 61.63 billion yuan, respectively. (3) the total value of soil conservation was 20.55 billion yuan and 61.63 billion yuan respectively under the two conditions of reducing silt accumulation and ensuring water quality control cost after excluding dead storage capacity by using the model of Xunhe, Qianyou River and Qianyou River. The soil conservation value per unit area was 313.6 yuan hm~ (-2) a ~ (-1) and 824.1 yuan hm~ (-2) a ~ (-1).
【作者单位】：西北大学城市与环境学院;城市与区域生态国家重点实验室(中国科学院生态环境研究中心);
【基金】：环保部重点项目(STSN-05-26) 西北大学研究生自主创新项目(YZZ14009) 国家林业公益性行业科研专项(201304309)资助~~
【分类号】：S157

【相似文献】