Research On The Campus Landscape Design Of Cold Area Universities Based On The Concept Of Sponge City

Under the global warming environment,with the rapid construction of China's urbanization,the underlying conditions of cities have changed,and the phenomenon of "city watching the sea" due to heavy rainfall has occurred frequently.The proposal of the concept of sponge city provides new guidance and reference for the development and construction of the city.As a sub-unit of the city,the campus is an emerging carrier for the construction of sponge cities at the micro level because of its many buildings,large water demand,and strong demonstration.At present,some southern colleges and universities have carried out the reconstruction of sponge campuses,but most of them focus on the effect of campus rainwater management,ignoring the importance of campus landscape,and the lack of research on cold cities.Therefore,based on the landscape perspective,the cold city It is of great significance to explore the construction of sponge campus.The thesis is based on the concept of the sponge city.First,through the development and research of domestic and foreign stormwater management research,the current status of research and the practice of rainwater management on college campuses,it is summarized and proposed that the sponge city concept should be applied to campus-level landscape design principles.,Objectives,implementation strategies and applicable facilities.Taking the Northeast Agricultural University of Harbin as the research object,the field survey and model analysis method are used to investigate and analyze the current situation of the agricultural university campus,the potential of rainwater utilization,and the causes of waterlogging on the site.By combining and deploying LID facilities with functions of penetration,filtration,transmission,collection,etc.,while achieving its ecological benefits,it enhances the campus landscape effect.At the same time,the SWMM software was used to analyze the effect of rain and flood control before and after the transformation.The main contents are as follows:(1)Field investigations after rain revealed the reasons for campus waterlogging: lack of rainwater management facilities,large impervious areas,many green areas with bare surface and high terrain.By evaluating the potential of rainwater collection on the campus of the Agricultural University,it is clear that if the campus rainwater runoff is collected reasonably,it will solve about 4/5 of the campus summer water demand,so it is of practical significance to determine the campus renovation.(2)Based on the collected campus basic data and field investigations,construct a rainstorm model on the campus of the Agricultural University.By simulating the surface runoff of the campus and the drainage process of the pipe network,the current status of campus drainage is evaluated,and it is concluded that under different rainfall recurrence periods,each sub Runoff and node overflow in the water area.(3)Formulate goals such as sponge campus construction,total runoff control,and regulation of various zones,determine the types and scale of LID facilities in the building,roads,green spaces,squares,etc.,and test whether the regulation of rainwater runoff in each zone meets the standards.Aiming at the above-mentioned level,the reconstruction strategy is proposed and the LID facilities are deployed to design the sponge campus landscape,and the integration of rainwater management facilities and campus landscape environment is completed.While carrying out campus rainwater management,create a beautiful campus landscape environment.(4)After the completion of the plan,the SWMM was used to simulate the evaluation of the reformed plan.The results showed that: after the sponge campus reconstruction,the total runoff under the recurrence period of p = 0.5,p = 3,p = 5,p = 10 Reduced by 64.5%,52.1%,50.5%,and 39.1% respectively;the number of node overflows was reduced by 2,3,4,and 7,respectively,and the longest accumulated water duration was shortened by 15,13,16,and 25 minutes,respectively;Effectively reduce the total amount of runoff,alleviate the waterlogging situation on campus,and produce good environmental benefits.