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Comparative Study of Sedimentation in Hydraulic Structures using Sharc and Ssiim Soft Wares - A Case of the Dez and Hamidieh Intake Structures in Iran

Authors: A.H. Sajedipoor, N. Hedayat , M. Mashal, R. Nazarzadeh

Abstract:

Sedimentation formation is a complex hydraulic phenomenon that has emerged as a major operational and maintenance consideration in modern hydraulic engineering in general and river engineering in particular. Sediments accumulation along the river course and their eventual storage in a form of islands affect water intake in the canal systems that are fed by the storage reservoirs. Without proper management, sediment transport can lead to major operational challenges in water distribution system of arid regions like the Dez and Hamidieh command areas. The paper aims to investigate sedimentation in the Western Canal of Dez Diversion Weir using the SHARC model and compare the results with the two intake structures of the Hamidieh dam in Iran using SSIIM model. The objective was to identify the factors which influence the process, check reliability of outcome and provide ways in which to mitigate the implications on operation and maintenance of the structures. Results estimated sand and silt bed loads concentrations to be 193 ppm and 827ppm respectively. This followed ,ore or less similar pattern in Hamidieh where the sediment formation impeded water intake in the canal system. Given the available data on average annual bed loads and average suspended sediment loads of 165ppm and 837ppm in the Dez, there was a significant statistical difference (16%) between the sand grains, whereas no significant difference (1.2%) was find in the silt grain sizes. One explanation for such finding being that along the 6 Km river course there was considerable meandering effects which explains recent shift in the hydraulic behavior along the stream course under investigation. The sand concentration in downstream relative to present state of the canal showed a steep descending curve. Sediment trapping on the other hand indicated a steep ascending curve. These occurred because the diversion weir was not considered in the simulation model. The comparative study showed very close similarities in the results which explains the fact that both software can be used as accurate and reliable analytical tools for simulation of the sedimentation in hydraulic engineering.

Keywords: SHARC, SSIIM, sedimentation, Dez diversion weir, Hamidieh dam, Intake structures

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1334666

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References:


[1] N .Hedayat, (2005). " Improving the performance of water delivery in the Dez and Moghan irrigation schemes in Iran ", PhD thesis, Crandfieid University, UK.
[2] N. Hedayat, Z. Tamoradi, H. Kiamanesh, and A. Afrus, (2010). Proceedings of the National Conference in water, Soil, Plant and agricultural Mechanization, Islamic, Azad University, Dezful, Iran
[3] H. Shirin (2009), "Investigating the sedimentation process using the SHARC software- A case study of the in the Eastern water intake of the Dez Diversion Weir in Dezful". M.Sc dissertation, , Islamic, Azad University, Dezful, Iran.
[4] A.H. Sajedi, M. Mashal and N. Hedayat, (2010), " Analytical study of the sediment formation using the SHARC computer model- A case study of the western water Intake in the Dez diversion weir in Dezful", Iran.
[5] H. Shirin , N. Hedayat and H. Kiamanesh (2010), " Investigating the sedimentation process using the SHARC software- A case study of the in the Eastern water intake of the Dez Diversion Weir in Dezful", Proceedings of the National Conference in water, Soil, Plant and agricultural Mechanization, Islamic, Azad University, Dezful, Iran.
[6] A.H. Sajedi, (2010), " Analytical study of the sediment formation using the SHARC computer model- A case study of the western water Intake in the Dez diversion weir in Dezful", Iran. M.Sc. dissertation, , Islamic, Azad University, Dezful, Iran.
[7] R. Nazarzadeh ,H. Kiamanesh, and N. Hedayat (2011). Investigating the sedimentation process using SSIIM 3D -A case of the Hamidieh Diversion dam in Iran. The proceedings of the WASET Conference, 27- 29 July, Paris, France.
[8] N. Hedayat (2011). Flexible water delivery as a viable model for sustainable agriculture-A case study of the Dez irrigation and drainage scheme in Dezful region, Iran. The proceedings of the WASET Conference, 27-29 July, Paris, France.