The Construction Method Of City Water Space System Based On Ecohydrological Process

Natural water space is the space of natural ecological processes and hydrological process coupling, in the city of rapid urbanization in China in the process of natural water, space is human transformation, the original natural process to produce corresponding change, cut off the ecological relationship between city and nature, thus resulting in water resource, water safety, water ecology, water environmental issues. The primary work of city water to solve the problems in the ecological restoration of water system of city space, but the premise, to repair the ecological city water system space is: understanding of eco hydrological process of natural water space, disturbed mechanism of city spatial understanding and prediction of water, city water space landscape in harmony with the natural ecological environment the.This paper first introduced the theory of eco hydrology hydrological process, understanding the relationship between the eco hydrological process and spatial pattern of natural water, surface water runoff, summed up the migration and accumulation of three major processes and water spatial pattern evolution of correlation; then, the natural relationship between eco hydrological processes and the spatial pattern of natural water as the change of concentration, migration and accumulation of the understanding of urban surface water and the corresponding space, found that lack of urban water space system adapt to the eco hydrological process, is the key cause of urban water ecological problems; puts forward repair "convergence" and "channel", "node" and "loop" and so on four big cities eco hydrological process of the system, the study on the key technology of ecological restoration of urban water system in river restoration and wetland system etc. the main content and scale, network simulation, the wetland for; finally, in the northern city of Xindu District of Chengdu city water system planning, application verification.The research on the integrated solution of city water resources, water safety, water ecology, water environment problems, the system level from the physical space, from the ecological transformation of idea and method, has carried on the positive exploration, the low carbon eco city in China, sponge city construction, has a certain theoretical and practical significance.The thesis is divided into six chapters:The first chapter, describes the background, purpose and significance of the research, and the city water space, eco hydrological processes are defined, the research methods and research content.The second chapter, introduced the basic research on the construction of city water system and related methods, sums up the shift in thinking and advanced experience of the construction of city water system at home and abroad, points out the main method of system need to be deepen and shortcomings.The third chapter, by comparing the ideal spatial pattern analysis of natural water, the eco hydrological process water confluence, migration, accumulation and spatial pattern of three corresponding relation between changes in the city, city water causes induction of spatial problems, put forward the eco hydrological process of city repair strategies under different scales.The fourth chapter, the function of repairing missing city water system based on the proposed space, city water space "bus", "channel", "node", "cycle" four system repair method, constructs the city bus can carry water resources, migration, accumulation of three greater than the range of ecological water space, and put forward the corresponding measures of water cycle. This part of research using the Arc SWAT distributed hydrological model GIS platform, through the establishment of city digital elevation model, simulate the city water space, put forward the corresponding method of city river, river pattern, wetland pattern remodeling.The fifth chapter, to participate in the project "Chengdu City North mall water space system planning" as an example, combined with the actual situation, to be applied to the city water system construction method, to verify its feasibility and perfect the theory.The sixth chapter, a summary of the research and the discussion.