Soil conservation assessment in the Upper Yangtze River Basin based on invest model

2011 International Symposium on Water Resource and Environmental Protection Pub Date : 2011-05-20 DOI:10.1109/ISWREP.2011.5893608

Jing Ren, Yu-kuan Wang, Bin Fu, Pei Xu

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引用次数: 6

Abstract

Studying and revealing the spatial distribution of soil loss will play an important role in water and soil conservation planning. In this study, the Geographic Information System (GIS) technology and the Integrated Valuation of Ecosystem Services and Tradeoffs Tool (InVEST) model were applied to estimate the amount of soil loss and assess the soil conservation capacity by the main ecological system in the Upper Yangtze River Basin (UYRB). The results show: (1) the annual potential soil erosion is 92.92×10⁸ t year^-1. The area of average annual soil loss bellow 500 km^-2 year^-1 occupies 35.08% and above 5000 km^-2 year^-1 occupies 36.8%. (2)The annual actual soil erosion is 12.30×10⁸ t year^-1. Slight and moderate soil loss is in majority, about 68.15% of the watershed area is found out to be under moderate degree. (3)The annual soil conservation is 80.61×10⁸ t year^-1, and the contributing percent of main individual ecosystems was as follows: the forest occupies 46.11%, grassland 24.21%. Forest ecosystem does best in soil conservation.

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基于投资模型的长江上游流域土壤保持评价

研究和揭示水土流失的空间分布规律对水土保持规划具有重要意义。本文采用地理信息系统(GIS)技术和生态系统服务与权衡综合评估工具(InVEST)模型，对长江上游主要生态系统的土壤流失量进行估算，并对其土壤保持能力进行评价。结果表明:(1)年土壤侵蚀潜力为92.92×108。年平均水土流失量在500 km-2以下的面积占35.08%，在5000 km-2以上的面积占36.8%。(2)年实际土壤侵蚀量为12.30×108 t -1。水土流失以轻度和中度为主，约占流域面积的68.15%。(3)年土壤保持力为80.61×108 t -1，主要生态系统个体贡献率为:森林占46.11%，草地占24.21%。森林生态系统的水土保持效果最好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2011 International Symposium on Water Resource and Environmental Protection

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