Abstract
Sand bags are one of the technologies still widely used to elevate water level. The sand bags are arranged in order to dam the river flow and to irrigate agricultural land, especially during the dry season. In line with its utilization, water supply of this technology is still less effective, thus, alternative technology is needed. This study aimed to test Barrier Knock-Down as an alternative technology that can be assembled and stored. This study was a quantitative research conducted by testing the prototypes. The tests were carried out using a monitor instrument Diver, piezometer. The tests of comparison were conducted in 4 types: Type 1, it was an L shape filled with sand+water; Type 2 was I shape filled with sand+water; Type 3 was an I shape filled with water; Type 4 was in an L shape filled with water. From the results of the study, type 1 is the best method for weir irrigation technology because of its ability to resist vertical and horizontal force than other types. Type 1-an L shape filled with sand+water with the value of safety factor rolling stability 5,28 and shear stability 2,23. Experiment result a stable elevation value in weir, did not experience a shift.
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