Numerical modelling the effect of wind on Water Level and Evaporation Rate in the Persian Gulf

Mahpeykar, Omid; Khalilabadi, Mohammad Reza

doi:10.22034/ijcoe.2021.149358

Numerical modelling the effect of wind on Water Level and Evaporation Rate in the Persian Gulf

Authors

¹ Khorramshahr University of marine science and technology

² Malek-Ashtar University of Technology

10.22034/ijcoe.2021.149358

Abstract

Evaporation is one of the most important quantities in the marine climate, and in the Persian Gulf, this parameter makes it one of the saltiest free waters in the world. Evaporation estimation is essential for water balance studies, irrigation, and land resource planning. Persian Gulf is known as shallow water and therefore has a high temperature in summer, which increases the rate of evaporation and high salinity up to 50PPT. In this study, the effect of wind speed and direction on the rate of evaporation in the Persian Gulf, assuming that there is no water inflow into the basin, was investigated using numerical modelling. Mike model is based on the three-dimensional solution of the Navier Stokes equations, assumption of incompressibility, Boussinesq approximation, and hydrostatic pressure. The effects of wind on evaporation at four different wind speeds and four different wind directions have been investigated. Results show the wind direction has little effect on evaporation, but wind speed has significant changes on evaporation rate and water level, and these changes are nonlinearly related to water temperature so that in summer the evaporation rate increases faster with increasing temperature.

Keywords

20.1001.1.25382667.2021.6.1.5.7

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