QE560 : Monitoring Land Subsidence Due to Changes in Groundwater Levels Using Radar Data in Kuhdasht Aquifer
Thesis > Central Library of Shahrood University > Geosciences > MSc > 2023
Authors:
Mahmood Kulivand [Author], Hadi Jafari[Supervisor]
Abstarct: Extraction of underground water includes various effects on the environment and dangerous consequences such as the loss of ecosystems. Radar remote sensing technology has received much attention due to its wide coverage, taking images in a short time frxame, the ability to take pictures in all weather conditions and during the day and night, high spatial resolution and availability. The purpose of this research is to calculate the subsidence and the effect of groundwater withdrawal on the subsidence of the Kuhdasht aquifer using radar data. For this purpose, annual and 6-year average subsidence (2016 to 2022) was performed using radar interferometric method on Sentinel 1 radar data. Then, using the underground water data, maps of isopotential, isodrop, density of wells and aquifer hydrograph were prepared. Finally, the results of subsidence and hydrological data were compared. The highest annual subsidence in 2017-2018 was 3.7 cm and the highest subsidence in 6 years was 9 cm. The low level of the water level in the Kaleh Gavrah, Baghazal, and Ab Bariki weather stations is due to the extraction of underground water in these areas, and the subsidence results are also consistent with the extraction of underground water. The highest annual drop is related to Kaleh Gavrah, Baghazal and Ab Bariki meteorology stations and the lowest annual drop is related to Bogelan station during 2016 to 2022. The reason for subsidence in Kaleh Gavrah, Baghazal, and Ab Bariki meteorology stations is the shallowness of groundwater withdrawal in these areas, so that the highest amount of groundwater loss can be observed in these stations as well. Due to the high density of wells in these areas, groundwater extraction has increased and therefore more subsidence has occurred.
Keywords:
#Kuhdasht Aquifer #Subsidence #Sentinel 1 #Interferometry #Underground Water Level Keeping place: Central Library of Shahrood University
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