STUDY OF DAM CONSTRUCTION STABILITY ON INDONESIAN TROPICAL PEATLAND RESTORATION USING HYDRAULIC PHYSICAL MODEL TEST

Water management in peatlands through canals construction is to control the groundwater level. So that peat does not become dry in the dry season, but also not inundated in the rainy season canal blocking is made or floodgates. The purpose of the canal block construction is to restore the wet and moist peat and restore the peatlands that have already been degraded and a source of water to extinguish fires in the event of land fires. Some technical problems in the construction of existing canal blocks, namely: 1) the condition of the pole experiencing bending, especially in the middle of the canal blocking; 2) underneath water seepage; and 3) water erosion occurs through the side of the bulkhead construction if the water level is higher than the height of the canal blocking construction. The study's location was the construction of canal blocking in the primary channel of Kalampangan, as part of the previous Mega Rice Project in the Palangka Raya Municipality, Central Kalimantan, Indonesia. This construction was taken as a prototype of a physical model test. The purpose of this study is to 1) determine the behavior of water flow in the channel in peatlands after canal blocking has been constructed; and 2) to study the design of canal blocking construction, which has secure stability when it is made in canals on peatlands. This study uses survey methods and physical hydraulic test models with a scale of H = 1: 30 and V = 1: 10. The field survey included measurements of crosssections of the channel, channel lengths, and measurements of water flow discharge with a distance of 100 m upstream and downstream of the dam. The physical model test research includes three types of physical models, namely Series 0, Series 1 and Series 2 models whose construction stability is tested against flood discharges for the Study of Dam Construction Stability on Indonesian Tropical Peatland Restoration using Hydraulic Physical Model Test http://www.iaeme.com/IJARET/index.asp 219 editor@iaeme.com return period of 5, 25, 50 and 100 years. A recommended model for the construction of canal block construction on peatlands will be obtained from the physical model test. Model Series 0 and Series 1 can accommodate flood discharge plans for Q5 and Q25, on the Q50 and Q100 flood discharge, the runoff occurs on the canal's partition construction. For Model series 2 when the discharge flood plan Q100, the run of not occur on the construction of a partition channel.