Landscape pattern analysis and optimum design of park green space in Nanchang City, China based on GIS
Landscape pattern analysis and optimum design of park green space in Nanchang City, China based on GIS
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DOI：
10.13287/j.1001-9332.201809.007
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发表时间：
2018-09-01
期刊：
影响因子：
--
通讯作者：
Liu Chun-qing
中科院分区：
文献类型：
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作者：
Wei Xu-ying;Cai Jun-huo;Liu Chun-qing
以南昌市主城区现有的公园绿色空间地图数据为基础，利用GIS技术建立了南昌市主城区公园绿色空间数据库，并利用景观格局分析软件FRAGSTATS计算了相应的景观指数。在分析南昌市绿色空间景观格局现状的基础上，提出了优化策略和方案，并对优化后的景观格局进行了评价。结果表明，目前北京市公园绿色空间斑块分布不均匀，面积差异较大，尤其是在人口密集区，公园绿色空间斑块数量较少，可用于避灾的面积明显偏低。通过大幅增加斑块数量和面积，改善斑块间连通度，适当提高景观破碎化指数，南昌市公园绿色空间系统“点-线-面”格局将得到优化，空间分布更加合理，有效提升其生物多样性保护、防灾避险作用。优化后的斑块多样性指数、均匀度指数和聚集度指数显著提高，优势度指数降低，景观多样性更加丰富。
Based on the current map data of park green space in the main urban area of Nanchang, the spatial database of park green space was set up with GIS technique, with the corresponding landscape indices being calculated by FRAGSTATS, the software of landscape pattern. Based on analyzing current landscape pattern of green space in Nanchang, the optimization strategy and scheme were proposed and the optimized landscape pattern was evaluated. The results indicated that the spatial distribution of patches in current park green space was uneven and area discrepancy was large, which is especially true in densely populated areas with less patch number of park green space and obviously low available area for disaster shelter. By substantially increasing the quantity and area of patches, improving the inter-patch connectivity, and increasing landscape fragmentation index appropriately, the "point-line-plane" pattern of park green space system in Nanchang would be optimized and the spatial distribution would be more rational, which could effectively enhance its role in biodiversity conservation, disaster prevention, and risk avoidance. The optimized indices of patch diversity, evenness and aggregation would be significantly increased, the dominance index would be reduced, and the landscape diversity would be more abundant.