| 摘要: |
| 生态敏感性对于区域生态安全格局的保护和发展具有十分重要的意义。从自然和社会两个维度，选择植被覆盖度、土地利用、水环境、历史遗留矿山点、人口密度、高程等 12 个指标因子作为河源市东源县生态敏感性评价指标，将研究区分为不敏感、低敏感、中度敏感和高度敏感 4 个等级，利用 GIS技术，结合层次分析法绘制出东源县整体生态敏感性空间分布图。研究结果表明：东源县综合的生态敏感性程度较高，以低敏感和中度敏感区为主，分别占东源县面积的 40.85% 和 42.96%，中度敏感区主要分布在西部、中部和东部山区和流域附近，低敏感区均匀分布在东源县丘陵地带；高度敏感区占县域面积9.51%，与中度敏感区一样，主要集中分布于西部、中部和东部山区；不敏感区占县域面积的 6.68%，集中分布在北部和南部地势平缓的城镇地区。最后，在生态敏感性分析的基础上结合东源县现状条件，针对不同敏感区提出具体的用地策略。 |
| 关键词: 生态敏感性 GIS 生态环境 东源县 |
| DOI： |
| 分类号: |
| 基金项目:广东省林业科技创新平台项目（2021-KJXM-09） |
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| Ecological Sensitivity Evaluation of County Based on GIS:Take Dongyuan County of Heyuan City as An Example |
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leisha1, weilong2, xiaolin1, zhengxiaozhong1, yinzuoyun1
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1.Zhongkai University of Agriculture and Engineering;2.Guangdong Academy of Forestry
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| Abstract: |
| Ecological sensitivity is very important for the protection and development of regional ecological security patterns. From two dimensions of nature and society, 12 index factors such as vegetation coverage, land use, water environment, historical mine sites, population density, and elevation were selected as ecological sensitivity evaluation indexes of Dongyuan county, Heyuan city, and the study was divided into four grades of insensitive, low, moderate and high sensitivity. The spatial distribution map of overall ecological sensitivity in Dongyuan county was drawn by using GIS technology and an analytic hierarchy process. The results showed that Dongyuan county had a high degree of comprehensive ecological sensitivity, mainly low sensitivity, and moderate sensitivity, accounting for 40.85% and 42.96% of the total area of Dongyuan county, respectively. Moderate sensitivity was mainly distributed in the western, central and eastern mountainous areas and near the watershed,while low sensitivity was evenly distributed in the foothills. The high-sensitive area accounted for 9.51% of the county area, which was mainly distributed in the western, central and eastern mountainous areas, just like the middle-sensitive area. The insensitive areas accounted for 6.68% of the county are, and were mainly distributed in the gentle urban areas in the north and south. Finally, land use strategies are put forward for different sensitive areas based on the analysis of ecological sensitivity and the current conditions of Dongyuan county. |
| Key words: ecological sensitivity GIS ecological environment Dongyuan county |
