结合空间句法的流域生态网络构建——以滇池流域为例

金满库; 颜蔚; 邹辉; 葛小三; 王佳恒

doi:10.13961/j.cnki.stbctb.20220829.004

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结合空间句法的流域生态网络构建——以滇池流域为例

试验研究

- 结合空间句法的流域生态网络构建——以滇池流域为例
- Constructionof Watershed Ecological Network BasedonSpatial Syntax——Taking Dianchi Lake Basinasa CaseStudy
- 水土保持通报 2023年43卷第1期页码：133-140
- 作者机构：
  
  1. 河南理工大学测绘与国土信息工程学院,河南,焦作,454002
  2. 中国科学院南京地理与湖泊研究所,南京,210018
- 作者简介：
- 基金信息：
  
  中国国土勘测规划院外协项目“长江经济带岸线资源动态变化监测与重点岸段管控政策研究”(20221811179)。
- DOI：10.13961/j.cnki.stbctb.20220829.004
  中图分类号： X826
- 纸质出版：2023
- 稿件说明：
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金满库, 颜蔚, 邹辉, 等. 结合空间句法的流域生态网络构建——以滇池流域为例[J]. 水土保持通报, 2023,43(1):133-140.

Jin Manku, Yan Wei, Zou Hui, et al. Constructionof Watershed Ecological Network BasedonSpatial Syntax——Taking Dianchi Lake Basinasa CaseStudy[J]. Bulletin of Soiland Water Conservation, 2023, 43(1): 133-140.
金满库, 颜蔚, 邹辉, 等. 结合空间句法的流域生态网络构建——以滇池流域为例[J]. 水土保持通报, 2023,43(1):133-140. DOI： 10.13961/j.cnki.stbctb.20220829.004.

Jin Manku, Yan Wei, Zou Hui, et al. Constructionof Watershed Ecological Network BasedonSpatial Syntax——Taking Dianchi Lake Basinasa CaseStudy[J]. Bulletin of Soiland Water Conservation, 2023, 43(1): 133-140. DOI： 10.13961/j.cnki.stbctb.20220829.004.

摘要

[目的

]

识别滇池生态廊道并识别生态节点及障碍点，进而优化流域生态网络，为滇池流域生态迁徙廊道维护和提升生态功能提供借鉴。[方法

]

以滇池流域为例，结合MSPA和电路理论识别研究区内的生态源地以及夹点、障碍区并构建生态网络，同时引入空间句法量化道路网对电阻力面进行优化，并与优化后电阻力面以及生态网络进行对比探究道路网对生态网络的影响。[结果

]

①研究区整体生态源地面积比例相对较高，提取17处生态源地面积101 248 hm

占研究区总面积的34.7%，主要位于北部山地以及中部环滇池区； ②优化后的电阻力面高阻力区由四周向主城区转移，并且廊道由35条增加至41条，总长度由185.9 km增加至216.2 km，网络闭合度、连接度、连通率分别提高0.20，0.35，0.13； ③通过廊道宽度阈值分析将廊道宽度确定为600 m，并提取生态夹点15 116 hm

和生态障碍区71 875 hm

共同组成滇池流域生态安全网络。[结论

]

滇池流域生态斑块形体破碎化明显，其分布呈现出北部生态源地密集、南部稀疏的特点。高等级、流量大的道路对生态网络切割效应更为突出，这一类夹点和障碍区在生态网络构建和修复中应该尤为重视。

Abstract

[Objective] The Dianchi Lake ecological corridor

the ecological nodes and obstacles were identified

and then the ecological network of the watershed was optimized in order to provide a reference for the maintenance and improvement of the ecological function of the ecological migration corridor in the Dianchi Lake basin. [Methods] The study was conducted for the Dianchi Lake basin. Morphological spatial pattern analysis was combined with circuit theory to identify the ecological sources

pinch points

and obstacle areas in the study area

and to construct an ecological network. At the same time

spatial syntax was introduced to quantify the road network in order to optimize the electrical resistance surface. The back resistance surface and the ecological network were compared to determine the impact of the road network on the ecological network. [Results] ① The overall ecological source area accounted for a relatively high proportion of the total study area. The 17 extracted ecological source areas had an area of 101 248 hm2 and accounted for 34.7% of the total area of the study area

mainly located in the northern mountainous area and the central area around Dianchi Lake; ② The optimized high resistance area of the resistive force surface was transferred from the surrounding area to the main urban area

and the number of corridors increased from 35 to 41. The total length increased from 185.9 km to 216.2 km. The degree of network closure

connection degree

and connection rate were increased by 0.20

0.35

and 0.13

respectively; ③ The corridor width was determined to be 600 m through the threshold analysis of corridor width. 15 116 hm2 of ecological pinch points and 71 875 hm2 of ecological barrier areas were extracted form the Dianchi Lake Basin ecological safety network. [Conclusion] The fragmentation of ecological patches in the Dianchi Lake basin was obvious

and their distribution showed the characteristics of dense ecological foci in the north and sparse ecological foci in the south. The cutting effect of high-grade and high-traffic roads on the ecological network was very prominent

and these kinds of pinch points and obstacle areas should be given greater attention in the construction and restoration of ecological networks.

关键词

Keywords

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