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.
怀来县未利用地开发生态敏感性研究
- Title:
- Study on Ecological Sensitivity of Unused Land Development in Huailai County
- Keywords:
- unused land; ecological sensitivity; terrain gradient; GIS; Huailai County
- 分类号:
- F301.24
- 摘要:
- 未利用地作为重要的后备土地资源与生态系统的一部分，不仅在缓解土地供需矛盾中发挥着重要作用，同时为生态系统稳定提供着强有力的支撑。研究以地处冀西北间山盆地区的河北省怀来县为例，根据其生态状况，从地形地质条件、人类活动干扰、生境与水资源环境3个方面选取指标，构建了怀来县未利用地开发生态敏感性评价指标体系，结合变异系数法和GIS空间分析功能，对怀来县未利用地的生态敏感性进行分析，将其划分为4个级别：低度敏感、中度敏感、重度敏感、极度敏感，并根据怀来县地形特点进行地形梯度的划分，划分出4级高程梯度带和4级坡度梯度带，以分析怀来县未利用地开发生态敏感性的地形梯度分布特征。结果表明：怀来县未利用地生态敏感性为低度敏感、中度敏感、重度敏感、极度敏感的未利用地面积分别为10 968.45 hm2，17 347.72 hm2，19 163.18 hm2和10 876.84 hm2，占研究区未利用地总面积的18.81%，29.73%，32.84%和18.64%，生态敏感性等级为重度敏感的未利用地较多。从地形梯度角度分析，怀来县未利用地主要分布在400～600 m高程梯度带以及大于25°坡度梯度带；生态敏感性等级为低度敏感的未利用地主要分布在400～600 m和600～800 m两个高程梯度带以及2°~6°和6°~15°两个坡度梯度带；随着高程与坡度的增加，各地形梯度带生态敏感性等级为极度敏感的未利用地比重增大，分别由最初的14.57%和0.00%提升到49.05%和27.80%。研究结果可以为怀来县未利用地开发利用与生态保护提供数据支撑和科学依据。
- 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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备注/Memo
收稿日期:2017-2-22;改回日期:2017-3-22。
基金项目:国土资源部公益性行业科研专项经费项目（201311060）；河北省科技支撑计划项目（132276329）
作者简介:康薇(1992-),女,河北廊坊人,硕士生,研究方向为土壤与土地资源持续利用。E-mail:1025850434@qq.com
通讯作者:张俊梅(1964-),女,河北保定人,教授,硕士生导师,主要从事土地资源可持续利用研究。E-mail:254157642@qq.com