[1]WANG Yang,WEI Jianbing,CHENG Yulu,et al.Evaluation of the Impact of Land Use Evolution on Water Conservation Capacity in Xinbin County, Upper Reaches of Hunhe River[J].Research of Soil and Water Conservation,2023,30(04):169-176.[doi:10.13869/j.cnki.rswc.2023.04.052.]
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Evaluation of the Impact of Land Use Evolution on Water Conservation Capacity in Xinbin County, Upper Reaches of Hunhe River
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 04
Page number:
169-176
Column:
Public date:
2023-06-10
- Title:
- Evaluation of the Impact of Land Use Evolution on Water Conservation Capacity in Xinbin County, Upper Reaches of Hunhe River
- CLC:
- X171.1
- DOI:
- 10.13869/j.cnki.rswc.2023.04.052.
- Abstract:
- [Objective] The relationship between land use changes and water conservation function in Xinbin County in water conservation area of upper reaches of Hunhe River was charified in order to guide the optimal management of land use and water resources in local or similar areas. [Methods] Based on ArcGIS platform, land use transfer matrix was used to study land use changes in Xinbin County in 1995, 2000, 2005, 2010 and 2015; on this base, the InVEST model was applied to evaluate the water production function and water conservation function of the region and different land use types from 1995 to 2015. [Results](1)From 1995 to 2015, the land use type of Xinbin County had always been dominated by woodland and grassland. In the past 21 years, the areas of woodland, other land(mainly wetland), water bodies and construction land had increased, among which the area of woodland had increased the most, and the areas of cultivated land and grassland were decreasing.(2)From 1995 to 2015, the increase of woodland, other land, construction land and water bodies came from cultivated land and grassland.(3)The average annual water yield of Xinbin County was 1.564×109 m3, water conservation capacity was 6.2×108 m3. As a key water conservation area, the average water conservation capacity of Xinbin County was 193.62 mm, showing a fluctuating trend of first decreasing, then increasing and then decreasing over the years. The change and distribution of water yield and land use directly affected the water conservation capacity of the region.(4)From 1995 to 2015, the water conservation capacity of different land use types changed significantly, and the order of average annual water conservation capacity of different land types was woodland>other land>grassland>water area>cultivated land>construction land. [Conclusion] High forest and grass coverage is the basis of water conservation in this area. Special attention should be paid to the forestland with the largest contribution to the total amount of water conservation in Xinbin County and the other land with the smallest area but strong water conservation capacity(mainly wetland). Meanwhile, attention should also be paid to the negative impact of the expansion of construction land on the area and quality of forest and grassland.
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Last Update:
2023-06-10