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:
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.
Constructionof Watershed Ecological Network BasedonSpatial Syntax——Taking Dianchi Lake Basinasa CaseStudy
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.
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Guo Xinya, Zhang Xingqi, Du Shixun, et al. The impact of onshore wind power projects on ecological corridors and landscape connectivity in Shanxi, China [J]. Journal of Cleaner Production,2020,254:120075.
Construction of Yunzhong-Xizhou mountains ecological network based on sensitivity evaluation of ecosystem services and ecology
Construction of ecological security pattern at Zhangjiakou section of Bashang region based on landscape connectivity optimization
Evaluation of coupling coordination degree of mountain-river-forest-farmland-lake life community based on HF-WFPPSIM method——A case study of Dianchi Lake basin
Relationship Between Landscape Pattern of Construction Land in Dianchi Lake Basin and Water Quality in Dianchi Lake
Ecological Network Construction of County Land Consolidation and Rehabilitation Based on Least Cost Distance Model
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