Modeling of Possible Dredging Effects of Khozeini Channel on the Water Renewal Time in Gorgan Bay, Southeast of tmj nhe Caspian Sea

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SHARBATY SAEED; Nasimi Sorena

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Journal: JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY Year:2018 | Volume:20 | Issue:1 (76) Page(s): 15-28

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Title

Modeling of Possible Dredging Effects of Khozeini Channel on the Water Renewal Time in Gorgan Bay, Southeast of tmj nhe Caspian Sea

Author(s)

SHARBATY SAEED | Nasimi Sorena | Issue Writer Certificate

Keywords

Ecological ModelingQ1

Renewal TimeQ1

Gorgan BayQ1

Khozeini ChannelQ1

Mike21 FMQ1

Abstract

Background and Objective: Water Renewal Time, one of the important indicators, is considered for estimation of health status of marine ecosystem. The Khozeini Channel has been the second communicative ways of the Gorgan Bay with the Caspian Sea which is blocked by decreasing of sea water level and sedimentation in recent years. In this investigation, in order to considering of Khozeini Channel possible dredging effects on the Water Renewal Time in the Gorgan Bay, the Hydrodynamic and Advection-Dispersion modules of two-dimensional Mike21 FM model were coupled simultaneously. Method: The modeling on two triangular unstructured meshes and under two different open boundary conditions by including wind stress, water fluctuations in the mouth of Bandartorkaman-Ashoradeh and Khozeini Channel, rivers input, evaporation and precipitation during index year were done. To determine the amount of dispersion coefficient in the Gorgan Bay, salinity modeling using Advection-Dispersion module of MIKE 21 FM were developed. Findings: The results two-dimensional salinity modeling showed that the best of dispersion coefficients are 350 m2/s in Gorgan Bay. The results of calculating of the Integral Water Renewal amount under blocking Khozeini Channel condition was 54 days and dredging channel condition a width of 170 m was 41 days. Discussion and Conclusion: The best time for Water Renewal Time modeling in Gorgan Bay is the beginning trend of intering annual water level rising in the Caspian Sea. Renewal Time values are depending on hydrodynamic regime and salinity dispersion coefficient in Gorgan Bay. According to the common counterclockwise water circulation pattern in Gorgan Bay, Khozeini Channel dredging reduces Integral Renewal Time of up to 13 days.

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APA: Copy

SHARBATY, SAEED, & Nasimi, Sorena. (2018). Modeling of Possible Dredging Effects of Khozeini Channel on the Water Renewal Time in Gorgan Bay, Southeast of tmj nhe Caspian Sea. JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY, 20(1 (76) ), 15-28. SID. https://sid.ir/paper/87211/en

Vancouver: Copy

SHARBATY SAEED, Nasimi Sorena. Modeling of Possible Dredging Effects of Khozeini Channel on the Water Renewal Time in Gorgan Bay, Southeast of tmj nhe Caspian Sea. JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY[Internet]. 2018;20(1 (76) ):15-28. Available from: https://sid.ir/paper/87211/en

IEEE: Copy

SAEED SHARBATY, and Sorena Nasimi, “Modeling of Possible Dredging Effects of Khozeini Channel on the Water Renewal Time in Gorgan Bay, Southeast of tmj nhe Caspian Sea,” JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY, vol. 20, no. 1 (76) , pp. 15–28, 2018, [Online]. Available: https://sid.ir/paper/87211/en

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