Research On Waterfront Vertical Landscape Design Of Chongqing Nan’an District Based On Flood Control Safety Conditions

Affected by climate change and uncontrollable natural floods,the urban waterfront is facing the risk of flooding;Chongqing Nan’an District has typical mountain characteristics,and the huge water level drop makes it difficult for the waterfront space to perform its social service functions;Chongqing’s Nanan District’s coastline is affected by water level drop Affect the fragile ecological environment.Therefore,the text takes the waterfront landscape of Chongqing Nan’an District as the research object,and through field flood control landscape investigation,takes the coupling relationship between water level and waterfront landscape as the starting point,and proposes a vertical waterfront landscape design strategy for Chongqing Nan’an District.The main research results of the article are as follows:(1)Analysis of the status quo of flood control and landscape in the south bank of Chongqing waterfront.Through the investigation of the two aspects of flood control and waterfront landscape along the river,the water level is first classified into safe flood level area(more than once in 100 years),high frequency flood level area(normal water level to once in 100 years)and drawdown flood level area(Low water level to normal water level)3 levels;secondly,summarize and summarize the cross-sectional shape,recreational space,and traffic system status of the waterfront landscape;finally,the crosssectional shape,recreational space and transportation system of the three water level areas and waterfront landscape Conduct coupling analysis and summarize the current situation of water level-waterfront landscape coupling analysis.Safe flood level area-safe landscape area: the water level is at or above the flood control standard,and the waterfront landscape is the transition area from the urban area to the waterfront area.As the last line of defense for urban flood control,flood prevention is its primary function;high frequency flood level area-recreation Landscape area: different high-frequency flood water levels,large vertical elevation differences in waterfront landscapes,but less recreational landscape functions and types,and waste of space resources;flood level areaecological landscape area: frequent water level fluctuations lead to extreme ecological environment on the shoreline Fragile,but the range of activities for people to be hydrophilic.(2)The waterfront vertical landscape design strategy of Chongqing Nan’an District based on "flood control + landscape".Based on the coupling analysis of water level and waterfront landscape,the design principles are in order to improve the safety of interface flood prevention,increase the diversity of the dyke landscape,and pay attention to the ecological protection of the water area;from a vertical perspective,the "cascade landscape design" strategy is proposed: safe water level area-safe landscape cascade(The landscape structure is "three lines,two points and one side" : including transition boundaries,tourist routes,security lines,entrances,landscape nodes,and open spaces),recreational landscape area-recreational landscape cascades(landscape structure is "two lines,one point and one side" : Including transition boundaries,sightseeing routes,landscape nodes and open spaces),ecological water level areas-ecological landscape cascades(the landscape structure is "one line,one side" : including sightseeing routes,landscape nodes and open spaces).(3)Practice of waterfront vertical landscape design in Chongqing Nan’an District.According to the function and form of the coastline,it is divided into three themes: natural river bank,human river bank and life river bank A(Ertang Street-Huanggedu),B(Huanggedu-Changjiahui),and C(Changjiahui-Dafo Temple)paragraph.The river beach habitat in the drawdown water level area of Section A is destroyed,and the focus is on the construction of ecological landscape cascades,and the suitable plants of the drawdown zone are used to build stable and diverse plant communities;the flood control capacity of the safe water level area of Section B is seriously insufficient,and the safety landscape cascades are emphasized and the embankment is heightened.And use its internal space to create a new urban interface and optimize the water-city interface;the recreational space resources in the high-frequency water level area of section C are wasted,and the design of recreational landscape cascades is emphasized,and the composite section is spatially modified to enrich the hierarchical defense line and increase the recreational space.Diversity and diversity of landscape functions.This paper takes the coupling relationship between water level and waterfront landscape as the starting point,and through vertical landscape design strategies,the waterfront landscape in Chongqing’s Nan’an District has both flood control,landscape and ecological functions,which is conducive to the sustainable development of the waterfront and is also a mountainous city of the same type.Waterfront landscape design provides a certain theoretical and practical reference.