D-insar based ground subsidence evaluation of different topographical sites with sentinel-1A/B platforms

Land subsidence occurs when large amount of subsurface water is withdrawn from the subsoil. Subsoil responsible for holding the ground intact compacts thus size and number of open pore spaces reduces; hence total storage capacity of the aquifer system permanently reduces. This May be the probable cause of declining groundwater levels. It May also result in ground failures due to subsidence There are some other causes leading to subsidence like drainage of organic soils, natural compaction, coal mining and sinkholes Landslides and soil creep are downslope movements of soil, gravel and rock masses under the influence of gravity.