A small dam or weir slow, semi-permanent type. Miao called Dam project works. On the traditional engineering MEO is a semi-permanent weir dam type. Same type of dam pig penSuch as twigs, stones to block down the stream. Or small water flow slows down and imprisoned in the areas around long enough to be absorbed into use.Weir Cats also may be used to irrigate. To a level high enough to pull water into the canal in the dry season. This project works with the trial Huai Hong Krai. Chiang MaiLater
Cats also be called a weir dam, too.