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| DOI：10.13522/j.cnki.ggps.2017.0356 |
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| Assessing Water and Land Conservation Based on Their Ecological Values: Taking Long River Basin as an Example |
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WANG Jin, LI Min, BI Rutian
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College of Resources & Environment, Shanxi Agricultural University, Taigu 030801, China
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| Abstract: |
| 【Objective】 Land degradation and poor water use efficiency are two problems facing the Change River Basin, and the purpose of this paper is to present a new method to ameliorate ecological and environmental deterioration in this region. 【Method】 We first extracted the surface slopes, NDVI index, land use types and land degradation in the region from available data, and then established the minimum accumulation resistance for water conservation, soil genesis, nutrient cycling, water and land conservation respectively, using the MCR model. From the resistance surface, we analyzed the land and water conservation for the most deteriorated mining areas. 【Result】 For the cumulative resistance of water conservation, the area associated with low, moderate and high resistance accounted for 54.5%, 35.8% and 9.7% of the total area respectively, with areas proximal to watercourses having the least resistance and those away from the watercourses having the highest. For cumulative resistance of land conversation and soil, the areas associated with low, moderate and high resistance made up 23.4%, 35.2% and 41.4% of the total area respectively, with the most degraded areas having the highest resistance and the areas away from them having the least. For both water and land, the areas associated with low, moderate and high resistance accounted for 8.8%, 80.9% and 10.3% respectively of the total area, with the high resistance areas in the northwest and the low resistance areas near the watercourses in the south. 【Conclusion】 Protecting the areas with high resistance is most challenging and the focus should be to remediate the degraded lands. Protecting the areas with moderate resistance should aim at the mining areas close to watercourses. Low resistance represents less degraded land, the focus in which should be to maintain or even improve its ecological and environmental quality. |
| Key words: conservation of water and land; evaluation; minimum cumulative resistance; ecology value; Long River basin |
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