ORCID Profile
0000-0002-2512-2317
Current Organisation
University of Tehran
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Publisher: Thomas Telford Ltd.
Date: 05-2019
Abstract: Determination of an optimal location for plant installation over water transmission lines leads not only to reduction in the cost of construction and energy transmission, but also to enhancement of hydrological conditions. The main objective of implementing a water supply pipelines project is not to generate power. Various economic and hydraulic attributes also play an important role during the selection of an optimal location for plant installation. Therefore, there is a need for utilising multi-attribute optimisation methods. The effective criteria include cost, maintenance and operation, and distances from both the consumption area and the main road. In this paper, six scenarios, based on the different maximum allowable pressures (in order of 10, 12·5, 15, 17·5 and 20 bar) and the current condition, were studied. The results indicated that the fourth scenario, with a maximum pressure of 17·5 bar (1750 kPa), should be regarded as the best choice for determining the optimal location. These results were in line with the ones obtained for cost analysis. Moreover, the leakage factor was mitigated by 24·1%. It is concluded that the methods of analytical hierarchy process and fuzzy analytic hierarchy process are useful tools in outlining the proper location for installation of a hydropower plant on water transmission pipelines.
Publisher: CRC Press
Date: 21-03-2014
DOI: 10.1201/B16766
Publisher: Springer Science and Business Media LLC
Date: 20-04-2012
Publisher: Springer Science and Business Media LLC
Date: 05-10-2017
Publisher: Inderscience Publishers
Date: 2012
Publisher: Informa UK Limited
Date: 05-07-2023
Publisher: IWA Publishing
Date: 04-05-2015
DOI: 10.2166/WST.2015.200
Abstract: The assessment of environmental flows in rivers is of vital importance for preserving riverine ecosystem processes. This paper addresses the evaluation of environmental flow requirements in three reaches along a typical perennial river (the Zab transboundary river, in north-west Iran), using different hydraulic, hydrological and ecological methods. The main objective of this study came from the construction of three dams and inter-basin transfer of water from the Zab River to the Urmia Lake. Eight hydrological methods (i.e. Tennant, Tessman, flow duration curve analysis, range of variability approach, Smakhtin, flow duration curve shifting, desktop reserve and 7Q2& (7-day low flow with a 2- and 10-year return period)) two hydraulic methods (slope value and maximum curvature) and two habitat simulation methods (hydraulic–ecologic, and Q Equation based on water quality indices) were used. Ecological needs of the riverine key species (mainly Barbus capito fish), river geometries, natural flow regime and the environmental status of river management were the main indices for determining the minimum flow requirements. The results indicate that the order of 35%, 17% and 18% of the mean annual flow are to be maintained for the upper, middle and downstream river reaches, respectively. The allocated monthly flow rates in the three Dams steering program are not sufficient to preserve the Zab River life.
Publisher: Springer Science and Business Media LLC
Date: 15-10-2022
Publisher: Informa UK Limited
Date: 13-07-2019
Publisher: Wiley
Date: 05-09-2019
DOI: 10.1002/JOC.5827
Publisher: Wiley
Date: 04-11-2023
DOI: 10.1111/JFR3.12871
Abstract: Digital Elevation Models (DEMs) act as an essential input to hydraulic models for the simulation of flood hazard maps. Coarser resolution DEMs are subject to higher levels of uncertainty, particularly in capturing river‐bed bathymetry. The principal aim of the present study was to assess the potential use of freely available DEMs and the 1D and 2D HEC‐RAS modeling approaches for flood mapping in four different types of river morphology. The DEM created from direct river survey (Surveyed DEM) was used as a benchmark to assess three remote sensing‐based DEMs (i.e., ALOS, SRTM, and ASTER). The results indicated that ALOS is more accurate. However, the regeneration of main‐channel bathymetry was poor for floodplain‐meandering and braided river reaches. The DEMs were then corrected by optimizing the number and layout of representative sections. A total of 144 tests were carried out. The results indicated that the flood‐mapping index F of ALOS increased from 86% to 91%. The flood mapping with a 1D model was sufficient in straight reaches (F‐index 84%). In floodplain‐meandering rivers, a 2D model had to be used to reach an F‐index up to 81%. The responses of both 1D and 2D models were almost identical in the case of wide‐braided rivers.
Publisher: American Society of Civil Engineers
Date: 29-10-2010
DOI: 10.1061/41147(392)83
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2023
No related grants have been discovered for Mehdi Yasi.