Study On The Optimization Application Of Stormwater Park Landscape Rainwater Facilities Based On Low Impact Developments

At present,China is vigorously promoting the construction of sponge city movement.Many ministries have introduced many policies and documents to ensure the implementation of policy.Under the background of sponge city policy,the policy aims to promote and ensure the effective implementation of city sponge taking example of the patterns and methods of different kinds of stormwater park at home and abroad.And on this basis,it will promote the smooth and effective construction of the sponge city.Because of the rapid process of urbanization,the environment of the urban underlying surface has changed greatly.The natural hydro logical cycle has suffered different degree of damage.Global climate changes due to the industrialization.The problem of urban flooding is becoming more and more serious.The state gradually realizes the urgency of solving such problems.After the introduction of the rainwater management and related research to China,using the concept of the"sponge city",it quickly leads to all levels of academic discussion and construction boom.But the research in this area is still in its infancy.The experience is still less than 10 years.So it has not yet formed a more mature construction system and can not be effective to guide the practice.Coupled with the vast territory,different cities and regions have different soil,geology,precipitation,climate and other natural conditions.So the implementation encounters great challenges.It is not difficult to find that through analyzing the traditional method of rainwater drainage,with the development of the times,it can not effectively meet the objective needs of contemporary urban development.At present,the Western countries gradually explore a more complete set of rainwater management methods.Among them,the United States LID stormwater management system has wider impact on China.With the help of urban leisure space and integrated LID function to take the advantage of the construction of the park within the scope of the source and deal with the problems caused by rain at the same time.On the basis of defining the concept of stormwater park,the first part divides the site into scale,internal layout characteristics,external environment and different types of rainwater parks with different user types.On the basis of its available characteristics combined with LID measures to achieve the whole process park sponge construction and transformation.The second part is to introduce the natural and precipitation conditions,30 years of rainfall characteristics and floods in Fuzhou.Based on the study of the literature combined with the overall construction and transformation of the urban park,the city residents are selected as the respondents to study their personal preference in the use of urban parks.At the same time,on the basis of understanding about their attitude toward LID design about the integration of the green land and sponge city policy to determine the possibility of green land transformation,as well as the public acceptance on the LID design.The third part is to choose the Delphi and other related tools,using stormwater park as the object,to sensitively sort the location and its facilities and on the basis of this to establish the hierarchy system of the factor of influence and select the useful landscape infrastructure of stormwater park.And then expect the ecological education benefits related to rainwater after the park construction and put forward the strategy of constructing local plant planting in stormwater Park.Finally,in the fourth part,In the case of the newly constructed Meifeng Mountain Rainwater Park in Fuzhou,taking into account the control rate reached by the city in the annual runoff and the matching design rainfall,through the calculation formula of the classical volumetric method in the scale of rainwater facilities with the help of the computer torrential flood management model SWMM simulation method to predict the corresponding 3,5,20 years after the design of the rainstorm corresponding site catchment effect,to estimate the rain and flood management and a series of ecological effects.