Study On The Landscape Construction Model Of Spillway In Newly Built Cities

After the establishment of Xiong'an New Area,the ecological priority and green development of urban construction were emphasized,and the Xin Gaifang spillway was regarded as the core ecological zone of Diandong District.At present,it is relatively rare for the research on the landscape construction mode of spillway at home and abroad.However,this thesis has carried out a systematic research on it.The traditional spillway management pays attention to the sudden flood disaster once in decades,and the channelized hardened river channel project is convenient for quick flood discharge in a short period of time.At the same time,the long-term idle precious land space resources have not been fully utilized and occupied by infrastructure such as agricultural land and urban high-pressure corridors,which results in serious ecological damage to the natural ecosystem of the spillway and lays a huge potential safety hazard for the next flood discharge.The construction of spillway involves water conservancy engineering,restoration ecology,river ecology,river geomorphology,landscape ecology and other disciplines.It is an urgent problem to be solved on how to construct the landscape of urban spillway at present.This research system constructs the landscape model of spillway.Firstly,based on the perspective of landscape architecture,taking the spillway of Xin Gaifang in Xiongan New Area as the research object,the landscape mode of spillway is explored andconstructed through the methods of literature research,site investigation,analysis,analogy and induction.Then Define the concept of "spillway landscape" and provide theoretical basis and direction for it.Secondly,combined with relevant documents and theories,the "spillway landscape" and related concepts are defined,and the construction mode of spillway landscape is proposed,which lays an important foundation for ecological restoration of spillway landscape.Three aspects are studied:(1)The principles of landscape construction of spillway;(2)The division mode of longitudinal flood control functional areas of spillway;(3)The structure mode of horizontal landscape functional area of spillway.According to the flood return period,the flood control functional areas are vertically divided into three functional areas,namely,the ecological protection area once every 20 years,the ecological buffer area once every 20-50 years,and the ecological utilization area once every 50-100 years.According to the natural law of spillway and the characteristics of human regional activities,the landscape functional area is horizontally divided into 4 functional areas,which are ecological conservation area,ecological experience area,recreation area and wilderness landscape area in turn.Through the combination of horizontal and vertical cross of spillway,12 landscape heterogeneity spatial units are obtained.This model mainly studies the combination of blue space,green space and human activity experience space of spillway to shape elastic landscape corridor space with flood regulation and storage,ecological continuation,landscape recreation and low maintenance.Finally,based on the Xin Gangfang spillway landscape planning and design as an example,put forward specific ecological landscape strategy.The landscape construction of the spillway should fully combine the site planning background and site characteristics,live in harmony with drought and flood,and coexist harmoniously with human and nature,and create a new type of urban spillway adaptive ecological landscape.It is hoped to provide reference for the landscape ecological management of spillway in the future.