نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه ارومیه
2 گروه مهندسی آب - استاد
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this article, the effect of sea level increase or decrease on the numerical modeling of groundwater behavior has been investigated. For this purpose, GeoStudio, a finite element numerical model based was used. Firstly, the desired model was recalibrated and validated based on benchmark published data from reliable sources, and then the changes in the saltwater level under different rates of increase and decrease in the observed level were investigated. The results of the investigation showed that applying different rates of saltwater level reduction to the numerical model has no effect on estimating the final dimensions of the saltwater wedge, while in the case of the sudden increase in the saltwater level, the wedge length is estimated to be 4% more than the cases of gradual increase. Also, the results of this research showed that the fastest time to reach the equilibrium of the system occurs when the water level increases or decreases instantaneously. However, the results showed that if the minimum time to reach the equilibrium is in the state of sudden decrease TR_min, as long as the duration of the gradual changes in the boundary conditions is less than half of this time, no change in the equilibrium time will occur. In addition, the results showed that the time to reach 50% of the advancing length of the saltwater length is independent of the rate of change of saltwater boundary conditions. If the minimum value of the time to reach the equilibrium in the case of instantaneous increase of the salt water level is TA_min and the time of increase of the salt water level is equal to or more than 1.4TA_min, the time to reach the equilibrium of the wedge will be approximately the same as the time of stopping the salt water level changes.
کلیدواژهها [English]
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