Land Resources Assessment Model for Mountainous Areas Based on GIS: A Case Study of Liangshan Yizu Autonomous Prefecture, Sichuan Province

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  • 1. Institute of Mountain Hazards and Environment, CAS, Chengdu 610041, China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2010-11-10

  Revised date: 2011-03-01

  Online published: 2011-08-20

Supported by

Knowledge Innovation Project of CAS, No.KZCX2-YW-333; No.KZCXZ-EW-317

Abstract

Land resources are key factors of the resources & environment capability in mountainous areas. They determine socio-economic development and sustainable development in the mountainous areas. So, land resources security assessment is an important task in mountain areas development planning. In this paper, a new land resources security assessment model for mountainous areas is developed based on geographic information system and statistical data. Firstly, the paper analyses the import factors for land resources security in mountainous areas. Then, the construction land security index and the food security index were been given in this paper. In order to compute the land security index, a dynamic weight was promoted, which can be computed for urbanization. The weight of construction land security index is the ratio of urbanization, and the weight of food security index is the ratio of non-urbanization. Taking Liangshan Yizu Autonomous Prefecture of Sichuan Province of China as a study area, we used the model to compute the construction land security index, food security index and land resources security index. The results show that the safest and safer land resources in Liangshan cover 17.65% of the counties, or 17.23% of the total land area, but land resources in unsafety and critical safety covers 58.82% of the counties of Liangshan, or 55.03% of the total land area. The result also indicates that topography is the most important factor affecting land resources security in this region, and the unsafe land resources areas are consistent with very poor areas. To improve the land productive potential, economical and intensive utilization of land resources are important measures for sustainable development & resources and environment security in mountainous areas.

Cite this article

LIU Bintao, LIU Shaoquan, TAO Heping, SHI Zhan, GUO Shili, CAOWeichao . Land Resources Assessment Model for Mountainous Areas Based on GIS: A Case Study of Liangshan Yizu Autonomous Prefecture, Sichuan Province[J]. Acta Geographica Sinica, 2011 , 66(8) : 1131 -1140 . DOI: 10.11821/xb201108012

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