Dam projects slow water.Check dam is the name of project works about engineering, traditional Miao is a slow water weir weir semi permanent type of weir type pigs. Using materials readily available locally, such as branches, rocks, to stem the slow stream water หรือทางน้ำ. Small flow down and locked in the area long enough to areas around will absorb to use. A restoration of degraded forest area forest development is enough to cause the moisture completely anew. Check dam may also be used to test the water. To a high level enough to pull the water used in the canal in the dry season. The project works this is a trial project, Huai Hong khrai, Chiang Mai, and achieved a success so as to other projects later.
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