DING Hui,ZHAO Xiaomin,GUO Xi,et al.Evaluation of Ecological Sensitivity in Poyang Lake Area of Jiangxi Province[J].Research of Soil and Water Conservation,2020,27(01):257-264.
江西省鄱阳湖区生态敏感性评价
- Title:
- Evaluation of Ecological Sensitivity in Poyang Lake Area of Jiangxi Province
- 文章编号:
- 1005-3409(2020)01-0257-08
- 分类号:
- X37
- 文献标志码:
- A
- 摘要:
- 江西省鄱阳湖区水旱灾害频发,生态敏感度高,严重制约着区域社会经济的发展。在此背景下,生态敏感性评价可为区域可持续发展提供科学依据。因此,为分析区域生态敏感性的分布特征,科学识别限制区域发展的生态敏感因子,从侵蚀风险、地质灾害、水环境、生态服务4个方面选取评价因子,构建了鄱阳湖区生态敏感性评价体系,在ArcGIS软件支持下,结合层次分析法对各敏感因子敏感指数以综合指数法加权求和,进而实现多因子综合评价,并通过自然断点法将综合评价结果划分为5个敏感等级。结果表明:降雨侵蚀、坡度大小、地灾易发性为区域主要敏感因子; 鄱阳湖区一般敏感、轻微敏感、不敏感区域占73.5%,整体敏感性较低; 都昌县、永修县、新建县整体表现最佳,辖区平均综合敏感指数分别为2.42,2.66,2.7; 而进贤县、余干县、九江市区、庐山市等区域有较为敏感特征,辖区内重度敏感和极敏感所占面积比为51.72%,49.79%,48.2%,42.32%; 整体上看,区域呈现西北方向向东南方向敏感程度加深的趋势。研究结果可为江西省鄱阳湖区生态保护与国土空间规划的政策制定提供参考依据。
- Abstract:
- The flood and drought disasters in the Poyang Lake area of Jiangxi Province are frequent and the ecological sensitivity is high, which seriously restricts the regional social and economic development. In this context, ecological sensitivity assessment can provide the scientific basis for regional sustainable development. In order to analyze the distribution characteristics of regional ecological sensitivity and scientifically identify the ecological sensitivity factors of restricted area development, we selected evaluation factors from four aspects: erosion risk, geological disaster, water environment and ecological service, and constructed the ecological sensitivity evaluation system of Poyang Lake area. The evaluation system is based on ArcGIS software, and combines with AHP and expert method to achieve multi-factor comprehensive evaluation. Finally, the evaluation results are divided into five sensitive levels by natural breakpoint method. The results show that rainfall erosion, slope gradient and land disaster susceptibility are the main sensitive factors in the region. The generally sensitive, slightly sensitive and insensitive areas in Poyang Lake account for 73.5%, and the overall sensitivity is low. Duchang County, Yongxiu County and Xinjian County have the overall best performance. The average comprehensive sensitivity indices of the jurisdictions are 2.42, 2.66 and 2.7, respectively. Jinxian County, Yugan County, Jiujiang City, and Lushan City have relatively sensitive characteristics. The percentages of the areas with severe sensitivity and extreme sensitivity in these four counties are 51.72%, 49.79%, 48.2%, and 42.32%, respectively. On the whole, the region shows a trend of increasing sensitivity from the northwest to the southeast. The evaluation results can provide reference for the policy making of ecological protection and land space planning in Poyang Lake region of Jiangxi Province.
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备注/Memo
收稿日期:2019-01-23 修回日期:2019-03-23
资助项目:国家自然科学基金(41361049);江西省赣鄱英才“555”领军人才项目(201295)
第一作者:丁徽(1996—),女,江西丰城人,硕士生研究生,主要从事土地评价与土地利用规划研究。E-mail:18279199513@163.com
通信作者:赵小敏(1962—),男,江西上高人,教授,博士生导师,主要从事土地利用评价与规划、土地遥感与信息等研究。E-mail:zhaoxm889@126.com.