Abstract:

【Objective】To improve the ecological, social and economic functions of urban river landscapes, qualitative and quantitative evaluations were combined to construct an evaluation model of water-sensitive river landscapes, and clarify the key direction of subsequent design of river landscape. 【Method】Taking Nanjing Crescent Lake as the research object, an urban water-sensitive river landscape evaluation system was constructed using the Analytic Hierarchy Process (AHP). Diversity, richness of waterscape levels, personalized landscape, artistic rainwater treatment, environmental coordination, public participation, ecological education, management and maintenance, flood control and water storage were used as indicators, and the weight of each indicator layer was determined according to expert opinions and combined with different backgrounds. The data of the population questionnaire survey was used to evaluate the suitability of each index of Crescent Lake by the distance index method.【Result】The data showed that the index of water-sensitivity landscape distance of Crescent Lake is 0.36, the evaluation level is basically suitable, the ecological distance index is 0.48 (basically suitable). the aesthetic distance index is 0.26 (basically suitable), and the functional distance index is 0.19 (suitable). The weight of the factors showed that Crescent Lake still needs to realize the purification, collection, storage and utilization of rainwater resources, as well as the artistic design of rainwater facilities and landscapes, increase the type and area of biological habitats, increase the types and numbers of water-sensitive plants, and restore the ecological environment. Through the data analysis of the evaluation of people with different backgrounds, we concluded that there are significant differences in the evaluation results in indicators such as biological habitat diversity, plant species diversity, waterscape layer richness, artistic rainwater treatment, ecological education, and management and maintenance. 【Conclusion】The water-sensitive river landscape evaluation model constructed in this study can provide a theoretical basis for the subsequent evaluation and design of urban river landscapes, and clarify the design direction for the subsequent sustainable development of river landscapes.

Key words: river landscape, water sensitivity, analytic hierarchy process(AHP), landscape evaluation, Nanjing Crescent Lake