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The Benefit Assessment of Urban Rainwater Utilization

Author: LiMeiJuan
Tutor: XuShiGuo；XuXiangZhou
School: Dalian University of Technology
Course: Hydrology and Water Resources
Keywords: Urban rainwater utilization Effective recognition Quantitative assessment Comprehensive Evaluation
CLC: TV213.9
Type: Master's thesis
Year: 2010
Downloads: 276
Quote: 3
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Abstract


Urban rainwater utilization mitigation of urban water shortages, reduce urban floods and effective way to improve urban water environment. The benefits of urban rainwater utilization lies not only cost-effective, more importantly, it can achieve water conservation, water conservation and protection, and control of urban soil erosion and waterlogging, and mitigation of ecological and social benefits of urban drainage pressure. The thesis for the study of urban rainwater resources, urban rainwater resources utilization effective identification and quantitative assessment study of the Dalian Wafangdian rainwater catchments engineering comprehensive benefits evaluation and program optimization, two districts in Dalian permeable The surface catchment effectiveness analysis calculated. Thesis research are as follows: (1) According to the urban rainwater utilization, rainwater use different ways to play the function of fulfilling its functions and achieve many of the economic, ecological and social benefits. Ideas, identify the benefits of urban rainwater resources generated application rainwater utilization measures butt coupling, rainwater utilization efficiency evaluation index set. A suitable method for the quantitative evaluation of the effectiveness of in-depth analysis of the characteristics of urban rainwater utilization efficiency, select OK. (2) comprehensive benefit evaluation of urban rainwater catchments engineering and program optimization. The use of semi-structured multi-level fuzzy comprehensive evaluation method and the Analytic Hierarchy Process, a comprehensive evaluation and program optimization of the Wafangdian rainwater utilization project in the three program. Learned from the results of the evaluation, appropriate expansion of the volume of the rainwater tanks, can improve the overall efficiency of rainwater utilization, but the reservoir volume is too large, unit rainwater cost will be too high and lead to comprehensive benefits decline. The new rainwater utilization patterns, such as rainwater infiltration through infiltration facilities covering groundwater the rainwater utilization measures recommended. Urban rainwater utilization overall efficiency of evaluation the significant use decisions in the rain. According to the criteria: efficiency index ≥ engineering feasibility, rainwater utilization of plant engineering program has economic rationality and feasibility. In addition, rain water demand and reservoir volume of rainwater utilization effects have an impact, reservoir design should be considered when conducting rainwater harvesting, runoff and water demand situation. (3) analysis to calculate the the catchment effectiveness of the two districts in Dalian City permeable surface. From 1998 to 2005, the benefits of the Dalian City permeable surface with the expansion of permeable surface area of ??the increase. 2005 quantitative calculation of economic benefits in a typical urban area of ??Dalian City (in the mountains and Xigang) of woodland, grassland, permeable pavement 10.18 × 106 yuan, the eco-efficiency of 85.43 × 106 yuan, effective flood control and drainage in the social benefits 9.12x106 yuan and of Dalian City permeable surface increase also create a good living environment, protect the rich tourism resources and promote the city's economic development. Visible, urban permeable surface in addition to generate economic benefits, more importantly, its ecological and social benefits.

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CLC: > Industrial Technology > Hydraulic Engineering > Water resources in tune to check with the Water Resources Planning > Water Resources Development > Comprehensive utilization of water resources
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