Resources Science ›› 2018, Vol. 40 ›› Issue (5): 967-979.doi: 10.18402/resci.2018.05.10

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Simulation of utilization and construction suitability of gentle hillsides based on risk evaluation in Banan District of Chongqing

Jing LI1(), Heping LIAO1,2(), Jin CAI1   

  1. 1. School of Geographical Sciences, Southwest University, Chongqing 400715, China
    2. Institute of Land Resources, Southwest University, Chongqing 400715, China
  • Received:2017-07-12 Revised:2018-03-06 Online:2018-05-10 Published:2018-05-10

Abstract:

Utilizing gentle hillside areas is an effective way to alleviate land use pressure and optimize the allocation of land resources and avoid potential risks. In order to explore dynamic simulation to evaluate suitability of gentle hillsides under different policy scenario, promote scientific and rational use of gentle hillsides and reduce utilization risk, we studied Banan District in Chongqing. Eleven indices were selected to establish the evaluation index system representing landscape risk, social risk and ecological risk. Simulation results of the utilization and construction suitability of gentle hillsides under five policy scenarios were carried out based on OWA (ordered weighted averaging) and GIS (geographical information system) methods. With increasing α (the decision risk coefficient), the level of utilization and construction suitability of gentle hillsides is higher. Suitability of the western part of the study area were overall better than that of the eastern part, while the suitability of areas around streets and towns were better than remote areas. Under non-extreme policy scenarios, suitability partition was more scattered. In the current period of land use planning, new urban construction land was mainly distributed in areas not comprised of gentle hillsides. Land use planning of gentle hillsides present a prudent and conservative attitude. To some extent, this research enriches the theory and methods of suitability evaluation of gentle hillside land. This work provides a reference and practice support for utilization and management of gentle hillsides in similar areas.

Key words: gentle hillside, suitability assessment, ordered weighted averaging, GIS, scenario simulation, Banan District, Chongqing