| Located in south china, Hangzhou is covered by dense river network. Due to the shortage of knowledge and limitation of waterfront spaces, traditional river regulation in Hangzhou just focused on the design of rigidity bank-protection, leading to the impairment of river ecosystem and landscape. In recent years,Hangzhou has begin to use ecological bank-protection, but the problems still exist such as the single plant configuration in land-water ecotones, similarity of landscapes, lack of biodiversity. In view of this, this thesis firstly reviews both domestic and foreign urban river ecological bank-protection theories; then try to carry out the survey of typical river system of the five major river systems of Hangzhou, and evaluated and summarized the integration of the ecological bank-protection and plant landscape; and next establishes a quantitative evaluation system of ecological bank-protection landscape using the Analytic Hierarchy Process (AHP) and Fuzzy Comprehensive Evaluation (FCE),; and finally analyses and studies the current situation and problems of YuHangTang River as the example. This thesis has a certain reference value to Hangzhou urban construction.The research results of this thesis are as follows:(1) the result of the survey shows that the common ecological bank-protection types in Hangzhou mainly includes natural bank-protection, pine pile bank-protection, bamboo bank-protection, wood+block stone bank-protection, dry block stone bank-protection, stone cage bank-protection,stone cage+vegetation carpet bank-protection, ecological bag bank-protection, etc..The result of the evaluation and summarization of the combination of ecological bank-protection and landscape plants shows that the combination of landscape plants and pine pile bank-protection, block stone and landscape block stone bank-protection has better effect and are suitable to be promoted. The growth of plants on stone cage bank-protection and ecological bag bank-protection are found to be poor, which is inappropriate to be promoted. (2) Through seasonal observation combining with information consultation, the author selects appropriate landscape plants for ecological bank-protection of the urban river land-water ecotones in Hangzhou, initially prepares a list of plants suitable to be planted in the ecological bank-protection in Hangzhou, analyses and summarizes a total of 120 species of plants including barracuda grass, butterfly flowers, irises, etc., and makes specific classification according to their bank-protection type, planting location, anti-wave ability.anti-contamination ability, light conditions, and so on. (3)Basing on questionnaire investigation, data collection, and data analysis, using AHP and FCE, this thesis determines 17 evaluation indexes including the structural stability, visual coordination, biological channel patent degree, construction investment and so on,and built a comprehensive landscape evaluation index system suitable for the ecological bank-protection of the urban river in Hangzhou. These indexes can reflect the engineering stability, landscape diversity, ecological suitability, economic applicability of the ecological bank-protection landscape. (4) Taking YuHangTang River as a typical case, this thesis analyses its current situation and the existing problems, proposes to combine the natural bank-protection and natural artificial bank-protection for bank repair, to improve the ecological protection landscape by ensuring the width of the land-water ecotones, adopting a variety of artificial vegetation restoration methods and providing habitat of animals, and recommends suitable bank-protection forms and the corresponding plant landscape configuration for the health and stability of YuHangTang River,which provided a reference for future ecological bank-protection landscape construction in Hangzhou. |
PDF Full Text Request