Showing 2 results for Laboratory Modeling
Pouria Moghri, Mehdi Rezapour, Abbasali Rezapour,
Volume 18, Issue 37 (2-2023)
Abstract
These days, the sea level rising and excessive harvesting of coastal aquifers has caused the intrusion of saltwater into underground water sources. In this study, the performance of the use of cut of wall, discharge well, and their simultaneous use in preventing saltwater intrusion has been evaluated in a laboratory model and under different scenarios. The results show that the appropriate use of the wall will reduce saltwater penetration by 15%. In addition, the use of a discharge well with flow rates of 0.065, 0.13, and 0.2 liters per minute will cause the return of salt water wedge by 5, 30, and 37%, respectively. The results of the simultaneous use of the discharge well with flow rates of 0.13 and 0.2 liters per minute and the cut of wall showed that the salt water wedge has retreated by 38 and 41%, respectively.
Mostafa Solgi, Abbasali Aliakbari Bidokhti, Mahdi Mohammad Mahdizadeh, Smaeyl Hassanzadeh, Hamed Deldar,
Volume 21, Issue 45 (3-2025)
Abstract
The speed of sound is a function of temperature, salinity and water pressure, and processes caused by vertical gradients of temperature and salinity, such as salt-fingering structures, can affect sound speed and propagation. In this research, the effect of Salt Fingers on the sound signal has been investigated in a laboratory environment and in a homogeneous water tank. In the presence of SF, the amplitude of direct and reflected signals from the surface is reduced, and the signals are received by the receiver with a time delay and with a slight decrease (5-10 dB) in sound power. By increasing the depth of the sound source, the scattering and deflection of the rays and the change in the amplitude of the sound signal are reduced. In the absence of salt fingers, the sound signal is propagated with the least energy loss and the sound rays are deflected towards the surface. But in the presence of SF and with the increase of salinity on the surface, the scattering and loss of the sound signal increases (up to 85 dB) and the sound rays are deflected towards the bottom of the tank. This effect is greater on the rays that propagate with a smaller angle.
