Drought caused by following factors
1) too little rain quantity. Has the rain delay for a long period of consecutive or distributed? Rain water is not uniform throughout the year, where the case will cause water shortages are certain or some season only. Continuous water shortages permanently
2) lack of planning in the use of water, such as do not prepare a container or reservoir to accommodate the rain water that falls to be applied during a water shortage.
3) geography is not ideal, so there are no natural water sources, the area is a large and permanent, or close to the ground and sloping terrain does not soak up water and thus make the catchment, are difficult to use.
4) natural plants were destroyed, especially the forest River forest resource survey 2009.2531 (1988) found only 28% of the remaining forest area of the country, or about 90 million acres, and the report processing, natural resources and environment of the Thai. Specifies whether in the year 1993. There are 2528 (1985) Forest Brook upstream only 9 million Rai of land only. Department of forestry tree planting was performed in the area were destroyed, particularly in the area of forest, streams, planting rate upstream, but still less than the rate of destruction is since. Total 2504 (1961) 2528 (1985) 24 hours to years, Forestry Department has all the space is tree planting. Approximately 3 million acres, but the average rate of deforestation in one year, equal to 3 million acres of land as well.
5.Water pollution occurs) to prevent the water used in this case, the benefit will be found.
Common in urban areas and dense industrial district
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