3. Changes about the environment.
area many of the damage from the floods. Due to the circumstances of the area site. Changes from the original state
3.1. The expansion of the urban areas. And the destruction of the drainage system is naturally
.Most of the area. Which once area that people use farming, consists of a basin, basin, pus, marshes and streams nature to get water. And the drainage area conveniently.Without drainage When developing areas such as community, industry sources or housing are filling soil adjust, build roads, buildings. Grow to a wide area. Therefore, puddle, pus.Natural and canals; be destroyed completely. And causes important is the location within the county community established several new! Often does not create a system drainage area properly and efficiently instead. ThereforeThus, causing flooding. And the damage will be tracked
.
3. 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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