7 research outputs found
Experimental study of head shape effects on shear stress distribution around a single groyne
Get PDFRiver hydrodynamicsInteraction with structure
ارائهی یک مدل تلفیقی شبیهسازی و بهینهسازی برای بهسازی شبکهی کنترل سیلاب شهری (مطالعه موردی : حوضهی سیلبرگردان شرق تهران)
No full textNowadays, \ design/rehabilitation of \ urban \ stormwater \ drainage systems has become a challenging issue due to more frequent severe floods in urbanized areas. These severe floods may cause significantly crucial social problems as well as financial damages. Also, regarding considerable advance in soft computing,
optimization \ frameworks can \ provide a valuable \ computational \ tool for storm
management. In the present study, using NSDE (Non-dominated Sorting
Differential Evolution) \ algorithm and EPA-SWMM (Environmental Protection Agency - Stormwater Management Model) software, a coupled numerical and multi objective optimization model was developed to rehabilitate eastern part of
Tehran metropolis drainage system. Not only is this part of Tehran Stormwater
Drainage System (TSDS) the biggest drainage network of TSDS, but also its
eastern part is dealing with a significant lack of capacity. In this direction,
different mitigating strategies including combinations of relief tunnels and/or
storage units were evaluated and optimal rehabilitation strategies were
suggested according to minimizing conflicting objective functions of costs and
flooding. For this purpose, formerly suggested rehabilitation solutions
introduced by Mahab Ghodss consulting engineering company have been evaluated and extra relief tunnels considered to enhance their performance in relation to reduce volume of flooding in the network. Therefore, the total number of four different layouts of rehabilitation strategies have been assumed in order to
rehabilitate eastern part of TSDS. Results have revealed considerable reduction
of costs with respect to previous rehabilitation proposals for the study area
stating the desirable performance of proposed coupled numerical and
optimization framework of the present study. Moreover, regarding application of
storage units in upstream of the network, although these units reduced
rehabilitation costs significantly compared to other strategy by reducing
length of required relief tunnels, relief tunnels slightly outperformed than
upstream storage units in relation to the flood volume reduction. It seems
possible to enhance the performance of storage units by relocating them
Development of a stochastic framework to design/rehabilitate urban stormwater drainage systems based on a resilient approach
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