Study results showed that 1) causes flooding in the basin are the main factors of 2554 (2011) mother works comes from the rain for a period of 12 consecutive days (between 2 to September 13) total rain Max 191.5 millimeters of water result in maximum range 37.76 cubic meters per second. While the parent watershed of nami volume potential flood just 26.30 cubic meters per second. It left the flood volume becomes flowing water well up 11.46 cubic meters per second. As a result, causes flooding There are also secondary factors that affect a drainage system that affect the occurrence of flooding is. Watershed Mae noton on drainage system with high slope and its area is covered by forest, tengrang. With a low water absorption potential. As a result, PA offers a range of flow conditions occur quickly. Make the parent watershed of notonklang to accommodate the traffic flow from sub basin flood on the middle and high. There are various water volume flow rate increased steadily to the lower watershed noton Mae, which limit their ability to accommodate water quantity. Resulted in floods and river bank then UM subsidiary out of bounds Mae Chee Lam meets nalai River on the lower River, before flowing into noton River Guangzhou. As a result, higher water levels, and there is also a supplementary factor in land utilization has been extended, for example, the direction, especially the invasion area on the water. Transport network overlap drainage system. Areas receiving water decreases due to the development of the agricultural area is a residential area and the construction of a dam to slow down water without opening the doors to E3 and E2 D2 D1 assessment areas have a higher risk for flood crisis by the above factors.
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