توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Quality and quantity assessment and sensitivity analysis of groundwater in Kashan plain
اطلاعات انتشار: نهمین کنگره بین المللی مهندسی عمران، سال
تعداد صفحات: ۸
In recent decades, excessive uptake from groundwater resources in addition to the effects of drought has lead to a critical drawdown of water table in most plains of Iran. In this research, Kashan plain in Isfahan province has been studied and modeled from groundwater hydraulics, interaction with surface water, and quality perspectives. Due to the adjacent salt lake and excessive discharge from the plain, Kashan aquifer has been subjected to rigorous advance of salt water front in different parts. Therefore, at first groundwater hydraulics in the plain was evaluated and the budget was determined. Then, the relative importance of each factor in this regard was studied from quantity and quality perspectives and sensitivity analysis was performed. Finally, different management strategies and recommendations for optimum water withdrawal from the aquifer was presented<\div>

۲ECOnomical optimization of water distribution networks based on resilience index and free chlorine residual
نویسنده(ها): ،
اطلاعات انتشار: نهمین کنگره بین المللی مهندسی عمران، سال
تعداد صفحات: ۸
Urban water distribution network WDN is one of the most important means which guarantees supply of water demands to different users with appropriate quantity and quality optimization of WDNs would be an effective step towards the proper use and management of water resources and meeting the growing water demands. in this article hanoi WDN has been optimized based on a quality and a quantity requirement .EPANET software was utilized along with the genetic algorithm to optimize the network. resilience index as a quantitative parameter and chlorine injection in a reservoir as a qualitative parameter were evaluated.<\div>

۳Spatial estimation of groundwater quality factors using geostatistical methods (case study: Shiraz plain)
اطلاعات انتشار: دهمین کنگره بین المللی مهندسی عمران، سال
تعداد صفحات: ۸
Water quality mapping is the main procedure of this assessment. At present research, we compare efficiency of three interpolation techniques included inverse distance weighting, kriging and cokriging for predicting of some groundwater quality indices such as: Na+, TH, EC, SAR, Cl– and SO4 2–. Data were related to 56 wells in Shiraz plain, Fars Province, Iran. After normalization of data, variogram was computed. Suitable model for fitness on experimental variogram was selected based on less root sum of square value. Then the best method for interpolation was selected, using crossvalidation, mean error and root mean square error. Results showed that for TH, EC, CL– SO4 2– Cokriging had the lowest root mean square error and for SAR , Na+ inverse distance weighting technique had better result than geostatistical method to simulate groundwater quality indices. Finally, using geostatistical and Kriging methods, map of Groundwater were prepared in GIS environment<\div>

۴Effect of Underwater Explosion on Offshore Platforms
اطلاعات انتشار: دهمین کنگره بین المللی مهندسی عمران، سال
تعداد صفحات: ۸
Underwater explosion is one of the main threats to offshore installations. Prediction of damages to such structures as Jacket–Template (J–T) Platform is one of the priorities in today’s research on offshore structures. In the present study, underwater explosion is simulated using Finite Element (FE) code and its effect on J–T Platform is investigated. To verify the correctness of modeling underwater explosion in the FE code, a thin rectangular plate, subjected to a shock wave was modeled and the result of analysis of this model was compared to those cited in the literature and excellent correlation was observed. After successful model validation, a 79.85m high J–T Platform, comprising of 258 pipe members, was modeled. The pipe's material was assumed to be elasto–plastic following Johnson–Cook strain rate hardening rule. Different amounts of charge mass were placed at different distances from the offshore platform and their effect on the structure, were investigated<\div>

۵Investigating pore network models as numerical tools to solve steady saturated groundwater flow
اطلاعات انتشار: Scientia Iranica، بيستم،شماره۶، ۲۰۱۳، سال
تعداد صفحات: ۱۴
In this paper, a novel procedure is introduced and employed to transform the partial differential steady saturated flow equation in porous media into a system of linear equations using Pore Network Models (PNMs). At first, a simple Square Pore Network Model (SPNM) is introduced and then this model is improved by increasing node connectivity (Square–Diagonal PNM; S–DPNM) and modification in handling impermeable boundaries by introducing imaginary nodes and pipes (S–DPNMi). Finally, a generalized formulation for unstructured discretization (Unstructured PNM; UPNM) of the domain is given and the effect of handling impermeable boundaries (UPNMi) on model accuracy is investigated. To explore the capabilities of these models as numerical tools, three examples are solved. Application of these models without modifications for impermeable boundaries (SPNM, S–DPNM, and UPNM) yields comparable results to those of traditional Finite Difference (FD) and Finite Element (FE) methods. Modification in handling impermeable boundary nodes not only yields results that are everywhere more accurate than FD and FE, but also benefits the simplicity of formulations.
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