Use of Artificial Wetlands in Urban Storm Water Quality Management
Surface water wetlands are a major and vital element of natural ecosystems. Amongst their various advantages and applications, artificial surface water wetlands play an important role in management of urban storm water quality. The treatment of the storm water as it flows through a wetland is the outcome of a complex interaction between the chemical, physical and biological processes that occur within the system. Hydraulic efficiency is one of the most important factors that has a considerable effect on the design of artificial wetlands. As a criterion, the suitability of design of a wetland is judged by the specified range of this parameter. The hydraulic efficiency of a wetland can be regarded as its capability to treat the water flow through it. The traditional way for evaluating the amount of hydraulic efficiency introduces the employment of a tracer to denote the quantity of the outlet concentration against the time. However, this is only possible in some natural wetlands. It is therefore necessary to use numerical methods for simulation and evaluation of various potential physical scenarios. Here, the relationship between the hydraulic efficiency and the wetland shape in different situations (such as the position of artificial obstacles versus the water flow) has been initially investigated for simple conditions. A two dimensional depth averaged model based on the shallow water equations has been developed. An ADI solution technique has been utilized where Finite Differences method has been used in the computational procedures to descretise the main equations.
artificial wetlands urban storm water two dimensional modelling hydraulic efficiency hydraulic retention time
Farhad YAZDANDOOST Mohammad ZOUNEMAT KERMANI
Department of Civil Engineering, KNT University of Technology, 1346 Vali Asr Ave. Mirdamad Cross, 19 Department of Civil Engineering, KNT University of Technology
国际会议
山东东营
英文
376-383
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）