One of the major of forest resources conservation is to do the weir weir water or slow slow moisture, which means that construction in small watershed in the river barrier Or areas with high slope. To make the water flow strength can to slow the flow slows down and retain sediment. In order not to go down into the river basin at the bottom.The type of weir or dam slow slow water moisture, divided into two types.1. The weir weir upstream or slow the moisture is a repository of dam water flowing slowly and can which milk under the surface. To create the moisture to the floor.2. The weir trap sediment, sand, a weir trap sediment and sand from flowing into the water below.The form of the weir can be divided into 3.1. A local elementary, commonly known as "check dam" is a construction material is naturally, such as branches, the rod. Flanked by stone of various size in the creek or ditch. It can trap sediment. Slow down the flow of water and add moisture to the area around the dam.2. A sort of rock is relatively fixed. A sort of stone wall construction with water. Construction of the middle and lower of the creek or raceway can trap sediment and retention น้ำในช่วงฤดูแล้ง partial3. The reinforced construction is permanent. Most will be conducted in the end of the creek or ditch. It can trap sediment and keep กักน้ำ in dry season. Construction depends on the size of the stream. Which should have the width not more than 4 meters.The advantage of the weir to slow the water.1. Help retain water.2. Help to reduce the severity of the wildfire.3. To reduce erosion of the soil. And reduce the severity of the tides in the creek.4. Helps retain sediments and materials flowing down to the water in the stream.5. To help increase the biodiversity.6. Is the habitat of animals and used as a water source for consumables.
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