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[1]KANG Wei,WANG Xiaoqing,ZHANG Liqiang,et al.Study on Ecological Sensitivity of Unused Land Development in Huailai County[J].Research of Soil and Water Conservation,2018,25(01):356-363.

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Study on Ecological Sensitivity of Unused Land Development in Huailai County

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 01 Page number: 356-363 Column: Public date: 2018-02-28

Title:: Study on Ecological Sensitivity of Unused Land Development in Huailai County

Author(s):: KANG Wei¹, WANG Xiaoqing¹, ZHANG Liqiang², YU Shuixiao¹, ZHANG Junmei²; 1. College of Resources and Environment Science, Agricultural University of Hebei, Baoding, Hebei 071000, China;
2. College of Land and Resources, Agricultural University of Hebei, Baoding, Hebei 071000, China

Keywords:: unused land; ecological sensitivity; terrain gradient; GIS; Huailai County

CLC:: F301.24

DOI:: -

Abstract:: As an important part of the reserve land resources and ecological system, unused land not only plays an important role in alleviating the contradiction between land supply and demand, but also provides a strong support for the stability of the ecosystem. This paper takes Huailai County of Hebei Province as an example. According to the ecological conditions, indicators were selected from 3 aspects of geological conditions and interference of human activities, habitat and water resource environment, the ecological sensitivity evaluation index system of Huailai County was built. The ecological sensitivity of unused land in Huailai County was analyzed by combing the variation coefficient method and spatial analysis function of GIS, in order to develop the unused land in Huailai. The ecological sensitivity can be divided into 4 levels:low sensitivity, moderate sensitivity, high sensitivity and extreme sensitivity. The 4 gradient zones of elevation and slope were divided to analyze the distribution characteristics of the ecological sensitivity of the unused land in Huailai County. The results showed that the areas of unused lands with low sensitive, moderately sensitive, severely sensitive and extremely sensitive levels were 10 968.45 hm²,17 347.72 hm²,19 163.18 hm²,10 876.84 hm², respectively, and accounting for 18.81%, 29.73%, 32.84% and 18.64% of total unused land in Huailai County, the area of unused land with severely sensitive level is dominant. According to the analysis on the base of terrain factors, the unused land of Huailai County mainly distributed in the zones with elevation of 400～600 m and the zones with greater than 25° slope. The unused lands in Huanlai County with low sensitivity mainly distributed in the zones with elevation of 400～600 m and 600～800 m and the zones with the 2°~ 6° and 6°~15° slope. With the increase of elevation and slope gradient, the proportion of extremely sensitive unused land becomes larger with each gradient zone, from the original 14.57% and up to 49.05% and 0.00% to 27.80%. These results can provide data support and scientific basis for the exploitation and ecological protection of unused land in Huailai County.

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