The study is intended to study the format of vetiver grass strips along the level, affecting soil erosion due to water runoff in a model Aquatic Sciences. Size: width 80 cm length 250 cm are 10. The format of the band vetiver all 4 patterns: 1) band vetiver has been massively crowded together-2), vetiver, the style bar, crowded with dense non-spaces within the band vetiver 5 to 10 centimeters. 5 cm high, approx. 10 cm placed in front of the band vetiver that massively crowded together-4) to take a thick plywood comes from vetiver about 5 cm high, approx. 10. 5 to 10 cm using the spacing of 50 cm bar length 2 is the vetiver and 100 cm and has a flow rate of runoff water in 5 flow rate: 0.1, 0.6, 1.6, 1.1 and 2.1 liters per second for a period of 10 minutes to recognize the characteristics of runoff and soil erosion. Keep all the water in 10 minutes led to swing from alum sludge suction and waterfall. Bring the water to mix with the remaining soil, sludge and dried. Study results showed that the vetiver in each instance that contains the distance between 50 cm to vetiver grass band can help prevent soil erosion are better than vetiver bars with spacing between bars vetiver 100 cm. It will be able to prevent the erosion of the soil has good bands beards with vetiver-that do not include spaces within the dense band vetiver 5 to 10 cm to bring a thick plywood comes from vetiver about 5 cm high, approx. 10. Where soil erosion resulting in minimal Formats the vetiver from thick, about 5 cm high, approx. 10 cm in front of the place vetiver bar massively crowded together in accordance with the distance between the band vetiver 50 cm. Cause of raised levels of the likes of vetiver grass strip quickly makes the speed of water surface area decreases, which is under the water and soil erosion has been reduced under water.
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