From forest rehabilitation development theory by His Majesty King Bhumibol Adulyadej, the water resources to maximize the benefits of creating a line of defense the wet (Wet Fire Break), one of the ways is to create a check dams of moisture or calledDam to intercept a small ditch or stream is periodically to retain the water and sediment, soil, some water will be stored in the ring to accumulate in the soil, moisture expansion into both the waterfront has become a wet forest (Chaipattana Foundation,2 5.) The office of the special project coordination due to the Royal (RDPB.(2.) that check dams watershed weir weir weir mewing or check dams blocking water moisture, same thing is called in English, is Check Dam structures or block the path of the river and across from the RDPB.The 1 / 2 notice in the meeting of the king's power to receive Order of His Majesty the construction of check dams in accordance with the Project Development Study Center Huai Krai Hong Son by His Majesty King Bhumibol Adulyadejin Chiang Mai, there should be expanded to cover all over the place
From there, the current government and the private sector projects in the creation of thousands of check dams reservoirs 1. The purpose is to slow down the flow and reduce the severity of the current washes down the collapse of banks 2 .3.) helps to trap sediment that flows into the raven, shallow water at the end to clear water and are of good quality, 4.) to help with the forest soil moisture rich add biodiversity, aquatic animals, and wild animals. Water in the lives of 5 ).6.) when soil moisture was forest, has become a leading light, reduce the severity of the fire
forest.The purpose of the study there are several pieces of work that supports the benefits of building check dams such as research Development Center at Highway project deep Creek found Chiang Dao District, Chiang Mai, in the dry season check dams9 at the same time, if the water is high-flying debris hanging check dams can reduce the amount of sediments more than 8 per cent to make the water flow slow down the property, and have an opportunity to penetrate the two across the land.4 (Pongsak ystem comprising multi-Kul and workgroups,2 ), and from the river basin study comparing Numdip Village in the district of Lampang Province found that build check dams 1 number of reservoirs
There is a small River basin in the area of approximately 1 square kilometers, and has an average of about 3 percent slope can help reduce the severity of the water flow of more than 5 per cent (comprising ystem Pongsak, and precious stones: prosperity,2.) to create the check dams Development Study Center Phu Phan, the growth of the trees in the forest, the two side-by-side streams, either in dry dipterocarp forest and Dry Evergreen Forest (invention Development Council gold and jewelry to prosper,2.) The Research found that there is also a simulation by virtue found that check dams, and the sludge is still in full can be made continuous by the percent 4 has the potential of creating a new weir (Pongsakfiling of happiness gained a coolie,2.)
However, in terms of other factors, including factors of physical and chemical factors Research has shown that one of the other information such as check dams, research report.effects will be sent as follows: 1.) high temperature of the water, because the water will slow down the water flow Mass Air to come into contact with at least the result of the evaporation decreases the accumulation of heat in the water surface 2 more).3.) The sludge accumulated in the bottom of the weir will be changed to the bottom of the water condition is changed from the gravel should be a stone and sand, it will change to settle land and mud, instead of social animals that are in accordance with the land change.The cloudy water, synthetic pesticides Water Light and sediment reduction in the accumulated more and more in the digestion of bacteria, a BoI (Biological Oxygen Demand:BOD), and the higher the value of the water is more acid from carbon dioxide emissions from the activity of bacteria, 4 .When banks lack of plants that will be in the bracket will cause a collapse in 5 easy-to-up) of the society will have to change, because crop water flow water flow slow down the impact that there will be more or less depending on various factors such as check dams.Type shape, etc. Therefore, before creating reservoirs, there should be a thorough study and research (Kunpradid et al,2.) Meanwhile, the conservation of biodiversity and the Environment studied the impact of the build check dams at the Falls Creek and sand remaining วชิรธาร Doi Inthanon Chiang Mai province.The Aquarium, live in the area disappeared and impact on other systems such as the house of insects, birds, eat insects decreases, and it is laid out as a crab turtle food. Lula down as a result, and the number of crab turtle Lula down with (นณณ์2.)
Therefore, in order to create the check dams, best results for all parties, and a negative impact on the environment, in the same house and as a result, housing in the area, at least.as well as how to create reservoirs that are appropriate for the area and factors both organisms and factors in the area of physical and check dams, built on a useful
up.
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