4. 2. Land subsidence
.In the urban area or community with population density. Always facing a shortage of water. This is generally how to fix it. By pumping water from the groundwater resources up the use of consumables.In each year, how to do it. Cause the water pressure in the deep groundwater resources is lower, then the water in the soil Which overlap on gravel as groundwater resourcesWhen the water in the gap of the lost ground, the soil more gradually collapsed gradually จนเกิด land subsidence caused by surface basin. Lower than normal levels in a wide area, such as the area of Bangkok.Which caused flooding, long after the heavy rain. Because the drainage from the floor that is not easy as before.
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