JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2019, Vol. 62 ›› Issue (04): 125-131.doi: 10.3969/j.issn.1000-2006.201806038

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Spatial characteristics of landscape pattern based on ecological restoration in the riparian zone of Huangpu River, Shanghai City

XU Haishun1, DU Hongyu2, CAI Chaolin1,2   

  1. (1.College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China; 2. Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China)
  • Online:2019-07-22 Published:2019-07-22

Abstract: 【Objective】 The objective of this study was to analyze the spatial characteristics of the riparian landscape of Huangpu River in order to find priority areas and landscape typologies for riparian ecological restoration. The outcome of this study can provide decision support for optimization of land use allocation, as well as landscape and ecological restoration around the area of Huangpu River.【Method】Based on high-resolution aerial images, a database of land use and landscape pattern within the riparian zone was constructed on the GIS platform. The spatial characteristics of landscape pattern in the riparian zone were analyzed by applying the quantitative landscape index method to both landscape class and pattern levels in longitudinal or cross-sectional directions.【Result】① In the cross-sectional dimension, urban areas exhibited the highest degree of urbanization and the lowest landscape diversity, as confirmed by spare and fragmented green lands and forests. We found the highest landscape diversity and degree of fragmentation in inner suburban areas; these transitional sections are dominated by industrial land. The outer suburban areas showed the lowest degree of human disturbance and the lowest intensity of land use, with clear intent to improve its agro-ecological and forest network. ② In the longitudinal dimension, L represents the distance from the river edge. While the ecological integrity of 0≤L<100 m riparian buffer zone was well protected, from the river going outwards, the intensity of human disturbance was found to increase gradually. Landscape diversity and degree of fragmentation showed a similar trends of initial increase, then decrease; landscape fragmentation degree of the 300≤L<400 m riparian zone was the most significant.【Conclusion】Owing to disturbances from urban development activities, the landscape pattern of the Huangpu River riparian zone became fragmented, showing adverse edge effects at the water-land interface. The industrial land, production shelter forest land, and dry land are critical landscape typologies. The inner suburban riparian zone in the longitudinal direction, and the 300≤L<400 m riparian zone and its adjacent areas in the cross-sectional direction are priority areas for ecological restoration.

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