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مدل کردن جریان متغیر تدریجی با نرم افزار HEC-RAS منبع : [Hidden Content] دانلود از پیوست gvf.zip

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

Evaluating Various Factors in Calculation of Scour Depth around Bridge Piers Using HEC-RAS Software, CSU2001 and Froehlich Equations Original Article, C59 Mousavi S.F and Daneshfaraz R. Journal. Civil Eng. Urban. 3(6):398-402. 2013 ABSTRACT:Today, scour is one of the important issues in river and coastal engineering science. Most of the existing structures exposed to the flowing water are destroyed by this phenomenon. Determining relationship between parameters influencing scour depth and maximum depth of scour, and also finding dominant function of them is one of the important issues in hydraulic engineering. Many equations and software have been presented by researchers to calculate local scour, such as Hec-Ras software. Ignorable errors of this software in vitro test make it one of the nominated options in evaluating local scour depth. Hec-Ras software uses CSU and Froehlich (1991) equations to calculate local scour. In this study, software output and manual calculation output of CSU and Froehlich equations were compared. Results of empirical equations and Hec-Ras in the scattering length of Haraz River were compared with each other to create equal hydrological and hydraulic conditions. Reviewing the Froude number, its measurement, and the effective coefficients of common empirical equations and software has significant effect on changes of these parameters in the results. The study also indicate that equations used in Hec-Ras will have acceptable results if their coefficients are examined with sufficient engineering , accurate perspective and controlling use or non-use of coefficients in ranges closer to the defined boundary. Keywords:Local Scour, Empirical Equations of Local Scour, Froude Number, Bridge Pier, Hec-Ras منبع: [Hidden Content] دانلود: [Hidden Content].,59-398-402.pdf J. Civil Eng. Urban.,59-398-402.pdf