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Experimental Study of Stormwater Runoff Reduction of Urban Green Land System

Author: NiMaCiRen
Tutor: YouXueYi
School: Tianjin University
Course: Environmental Science
Keywords: Green System Stormwater runoff Reduction of the role of City
CLC: X143
Type: Master's thesis
Year: 2010
Downloads: 217
Quote: 0
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Abstract


In this thesis, extensive research in related areas of research, theory and practice, based on the study with green stormwater runoff management system construction of key technologies. In indoor and outdoor experiments demonstrated from multiple angles on the basis of green space system for stormwater runoff reduction effect, explores the use of urban stormwater runoff management measures for urban green construction and ecological construction of drainage systems to provide a frame of reference. Main results are as follows: 1, theory and practice at home and abroad on the basis of extensive research, summarize manage stormwater runoff in developed countries as well as domestic and features of the Evolution of a comprehensive analysis of the national management of stormwater runoff problems and development trends, get green system construction concept, development process and green building trends and problems. 2, demonstrates the urban green space system for stormwater runoff reduction function and storing function. Through field experiments and laboratory soil column experiments found that green space system for stormwater runoff reduction rate can reach 42.91 ~ 72.74%. 3, the vegetation cover is an important factor in reduction of stormwater runoff. The higher the degree of vegetation cover on runoff reduction effect is more obvious. Green vegetation cover system is 30%, the reduction of 42.91 ~ 59.84% of runoff; vegetation cover is 60%, you can cut down 55.74 ~ 65.45% of runoff; when vegetation cover up to 90%, you can cut down 64.74 ~ 72.74 % of the runoff. 4, different vegetation types on runoff reduction has an important role. The same vegetation cover, because different types of vegetation on runoff reduction are not the same. Vegetation coverage is 90% of the conditions, the reduction of stormwater runoff degree bluegrass tall fescue Mixture gt; tall fescue gt; buffalo grass; vegetation cover are 60% under the conditions of the reduction of stormwater runoff extent buffalo grass gt; tall fescue gt; bluegrass tall fescue Mixture; vegetation cover is 30% of the conditions, a high degree of reduction of stormwater runoff fescue gt; buffalo grass gt; bluegrass tall fescue Mixture; Therefore, Festuca Mao for stormwater runoff mitigation gt; buffalo grass gt; bluegrass tall fescue Mixture. 5, vegetation cover and runoff turbidity close. The higher the degree of vegetation cover, the smaller the runoff turbidity, vegetation height was lower, the greater the turbidity runoff. When the vegetation cover was 90%, the average runoff turbidity 14.27 ~ 72.14NTU; when vegetation cover was 60%, the average turbidity of runoff 39 ~ 91.85NTU; when the vegetation cover is 30%, the average turbidity runoff ranged from 113.8 ~ 128.24NTU. 6, based on this experiment and the theory and practice at home and abroad to explore the urban stormwater runoff management strategies for water, landscaping, planning and other relevant government departments decision to provide a reference.

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CLC: > Environmental science, safety science > The basic theory for the Environment and Science > Environmental Earth Science > Environmental Hydrology
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