جستجو در تالارهای گفتگو

Zoning of Flood Caused by Farrokhi Dam Breaking Of Qaen South Khorasan, Iran Original Article, D83 Rezaei M., Rezvani Mahmuee A., Khaksefidi S. J. Civil Eng. Urban. 4(5): 550-553. 2014 ABSTRACT: Due to the very high losses caused by breakage of dams, especially with regard to the dams that are constructed in the upstream of population centers, dam breakage of studies, including estimating fracture parameters, routing, and flood zoning caused by dam breaking for safety management at downstream dams, seem to be necessary. This is possible with the use of hydraulic models and GIS. In this study, using a dam breaking analysis for Farrokhi dam of Qaen located in South Khorasan, and use computer models HEC-RAS, GIS and Breach, flood zoning of the case is investigated. According to the results of failure analysis, flood routing, is performed downstream of dam above, and the result is entered in GIS, and flood zone is provided. Based on the results from rural areas of Farrokhi and Mahdiabad, downstream of the dam is exposed to the risk of dam break flood. Furthermore, it is suggested, using a risk matrix, areas at risk from flooding, to determine, by combining maps, speed, and depth of flooding, and determine the amount of risk in each area of high risk areas. Forecasting losses reduction system such as flood warning systems, anti-flood out buildings, editing recipes measures in emergencies, dams, public procurement procedures, to deal with emergencies, and perform periodic maneuvers to necessary to maintain readiness for dealing with crisis situations, the separation of risk areas is essential. Keywords: Dam Break, Flood Zoning, Farrokhi, HEC-RAS منبع: [Hidden Content] دانلود: [Hidden Content].,%204%20(5)%20550-553,%202014.pdf J. Civil Eng. Urban., 4 (5) 550-553, 2014.pdf

Effect of a High Resolution Finite Volume Scheme with Unstructured Voronoi Mesh for Dam Break Simulation Original Article, D71 Jalalpour H. and Tabandeh SM. J. Civil Eng. Urban. 4(4): 474-479. 2014 ABSTRACT: In this paper, a high resolution finite volume method (FVM) is developed in order to discretization of multidimensional mathematical equations of Dam Break Phenomena using an unstructured Voronoi mesh grid for evaluating the effect of this type of mesh. Accordingly, the robust local Lax-Friedrichs (LLxF) scheme was used for the calculating of the numerical flux at cells interfaces. The model named FVDBC was run under the asymmetry partial and circular dam break conditions and then verified by comparing the model outputs with the documented results presented in the literature. A statistical analysis using SPSS statistical are performed to confirm the verification of the developed method. In addition, statistical observations indicated a good conformity between the FVDBC and analytical results clearly. The results of FVDBC code with voronoi mesh presented higher efficiency and precision than other meshes. Thus, it is better to use the voronoi mesh in numerical discrete equations because not only able to complicated geometries but also can give accurate results in lower computational effort. Due to a precise agreement between those output and documented results, the FVDBC could be considered as a reliable method for dealing with shallow water (SW) and shock problems, especially those having discontinuities. Keywords: Dam break, finite volume method, high resolution Local Lax–Friedrich scheme, Voronoi Mesh. منبع: [Hidden Content] دانلود: [Hidden Content].,%204%20(4)%20474-479,%202014.pdf J. Civil Eng. Urban., 4 (4) 474-479, 2014.pdf