淤地坝是以拦泥淤地为主要目的的治沟建筑物,在我省已有几百年的发展历史, 它不仅可缓洪拦沙,有效地控制水土流失,而且还可变荒沟为良田,增加农业收入。大量调查资料表明,每淤成一亩坝地,可拦泥3,000～6,000立方米。坝地土肥水足,一般亩产粮食250～300公斤,高者可达500公斤以上。坝地旱 The silt dam is a ditch-ditching building whose main purpose is to stop mud and silt. It has been in the province for several hundred years and has not only slowed water and sediment retention but also effectively controlled soil and water loss, As fertile land, increase agricultural income. A large number of survey data show that each siltation into a mu of land, sludge can be stopped 3,000 to 6,000 cubic meters. Dam soil fertilizers enough, generally mu produce 250 to 300 kg, the highest up to 500 kg. Dam drought