3. As groundwater restoration projects kick in, the shallower, rising groundwater table facilitates a granular phenomenon called soil liquefaction whereby shaking ground builds up excessive pore pressure in the saturated soil, which loosens grain contacts and their strength.
2. Together with urbanization, groundwater extraction is usually the first choice for the urban water supply, and its process syncs with the urbanization process. So, a large majority of urban structures were constructed on a lowering groundwater table