Study on Spatiotemporal Differences in Ecological Efficiency in Sponge City Demonstration Area
Aiming at the evaluation of the ecological effect of the input and output of sponge city construction,taking Tianjin Sponge City Construction Demonstration Zone as an example,this article explored the spatial and temporal differences of ecological efficiency under different construction modes,which provided a reference for the construction of sponge city in the northern semi-arid area.The unexpected SBM model was used to analyze the spatiotemporal differences in eco-efficiency from 2017 to 2020 from two scales:demonstration area and drainage zoning.The eco-efficiency of DMU sub-districts in the Sino-Singapore Tianjin Eco-City Demonstration Zone and Jiefang South Road Demonstration Zone has been effectively improved.The underlying surface characteristics of each sub-district and the sponge facilities built result in obvious change in ecological efficiency.The improvement of eco-efficiency in the area closer to the main river system is better than that in the area farther from the main river system,and the eco-efficiency value of the zone with more old communities is relatively low.From the time series,the eco-efficiency of 4 years is significantly improved.The improvement of eco-efficiency in new urban areas is better than that in old urban areas.Sponge-type park and green space projects,water system remediation,and ecological restoration projects have significant effects on improving ecological efficiency.The level of management and maintenance of the sponge facility after completion and operation is critical to maintaining eco-efficiency.
万方数据
维普
