[1]LI Gang,LU Xiaoning,BIAN Jinhu,et al.Evaluation of Land Carrying Capacity in Upper Reaches of Minjiang River[J].Research of Soil and Water Conservation,2015,22(01):262-268.
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Evaluation of Land Carrying Capacity in Upper Reaches of Minjiang River

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 01 Page number: 262-268 Column: Public date: 2015-02-28
Title:
Evaluation of Land Carrying Capacity in Upper Reaches of Minjiang River
Author(s):
LI Gang1,2, LU Xiaoning1, BIAN Jinhu2, LI Ainong2, LEI Guangbin2, NAN Xi2, JIANG Lin1,2
1. Chengdu University of Information Technology, Chengdu 610225, China;
2. Institute of Mountain Hazards and Environment, CAS, Chengdu 610441, China
Keywords:
land carrying capacity; DPSIR; principal component analysis; upper reaches of Minjiang River
CLC:
F30.124
DOI:
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Abstract:
With the complex terrain and prominent contradiction between human and land of the upper reaches of Minjiang River, land resources are scarce in this region, especially after the Wenchuan earthquake in 2008. This paper built the land carrying capacity index system for the upper reaches of Minjiang River with the aid of DPSIR model and distributes data to grid with help of GIS, and then, principal component analysis (PCA) was applied to calculate weights for each index. The capacity of land carrying is divided into five grades: relatively high, high, medium, relatively low, low. Results show that: (1) land carrying capacity of the upper reaches of Minjiang River follows the law of the high capacity in the east and the low capacity in the west in general. The order of five counties from good to bad is that Maoxian, Wenchuan, Lixian, Heishui and Songpan. The intermediate zone size is the biggest, accounting for 33.2%. The high-grade area size is the smallest, accounting for 4.8%; (2) indexes of social economy and herding in the area has a greater influence on the land carrying capacity; (3) the soil erosion of Wenchuan earthquake area is serious, but its land carrying capacity is relatively medium; (4) through the analysis on the contribution rate of a rule layer, it can be seen that the state factors about efficiency and types of land use are the most sensitive layer to the evaluation results. The average contribution rate is 72%. This study is of great significance to land resources utilization and regional sustainable development in the upper reaches of Minjiang River and provides support for reconstruction and development of Wenchuan after the earthquake.
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