Ferdowsi University of Mashhad
Water and Soil
2008-4757
24
6
2011
01
21
Optimum Design of Sedimentation Basins in Irrigation Networks
Optimum Design of Sedimentation Basins in Irrigation Networks
33624
10.22067/jsw.v0i0.7489
FA
S.N.
Shetab Boushehri
Isfahan University of Technology, Isfahan
S.F.
Mousavi
Isfahan University of Technology, Isfahan
S.B.
Shetab Boushehri
Company of Karkheh and Shavoor Irrigation Networks, Ahvaz
Journal Article
2011
01
31
Abstract
One of the problems in design of irrigation structures is sedimentation control in the inlet to the irrigation networks. Water quality for agriculture requires that the sediments be controlled and reduced to the permissible limit at their entrance point to the turnouts and irrigation networks. This is possible by constructing a sedimentation basin. The bigger the basin, the best the retardation of the sediments, but the expenses are higher too. Different mathematical models are developed for sedimentation basins. Most of these models show the relationship between efficiency and effective parameters by mathematical formulas. In this research, a computer software for design of settling basins was designed in which design parameters (length, width, depth, slope and water velocity in the basin) are determined such that the basin has the specified technical characteristics and it is built with minimum cost. In this respect, operations research and a lexicographic enumeration algorithm is used. Application of this software for evaluation of construction costs of sedimentation basins in Nekouabad diversion dam Zayandehrud irrigation networks at Isfahan) showed that efficiency of these basins is 50.6% and 46.5%. If these basins were built under optimum design, about 18% and 6% would have been saved in their construction costs, respectively.
.
Keywords: Sedimentation basin, Lexicographic programming, Nekouabad dam
Abstract
One of the problems in design of irrigation structures is sedimentation control in the inlet to the irrigation networks. Water quality for agriculture requires that the sediments be controlled and reduced to the permissible limit at their entrance point to the turnouts and irrigation networks. This is possible by constructing a sedimentation basin. The bigger the basin, the best the retardation of the sediments, but the expenses are higher too. Different mathematical models are developed for sedimentation basins. Most of these models show the relationship between efficiency and effective parameters by mathematical formulas. In this research, a computer software for design of settling basins was designed in which design parameters (length, width, depth, slope and water velocity in the basin) are determined such that the basin has the specified technical characteristics and it is built with minimum cost. In this respect, operations research and a lexicographic enumeration algorithm is used. Application of this software for evaluation of construction costs of sedimentation basins in Nekouabad diversion dam Zayandehrud irrigation networks at Isfahan) showed that efficiency of these basins is 50.6% and 46.5%. If these basins were built under optimum design, about 18% and 6% would have been saved in their construction costs, respectively.
.
Keywords: Sedimentation basin, Lexicographic programming, Nekouabad dam
https://jsw.um.ac.ir/article_33624_ecf3a2de546557a544a8d13be4d0f2bf.pdf