PERENCANAAN CHECK DAM SEBAGAI BANGUNAN PENGENDALI SEDIMEN PADA PROYEK SUPERVISI REHABILITASI PRASARANA BANGUNAN PENGENDALI BANJIR SUNGAI TIPAR DAN ANAK SUNGAINYA, KABUPATEN KEBUMEN, BANYUMAS, DAN CILACAP, PROVINSI JAWA TENGAH

Abstrack: Check Dam is part of the work on the project Supervision Rehabilitation Infrastructure Floods Building Control Tipar River and Tipar’s Child River, Kebumen, Banyumas and Cilacap Regencies, Central of Java Province. Check Dam is located in the River Basin Area Tipar and Tipar’s Child River, precisely in the River Petarangan, Hamlet Karangangin, Village Selanegara, District Sumpiuh, Banyumas Regency, with position 7o 31’ 20,27” LS and 109o 07’ 28,38” BT. Check Dam functions is to avoid river downstream, to control the flow of river surface downstream so as not to overflow, and to restore the capacity of river catchment in normal condition (before sedimentation). In writing this Final Project, obtained from several analyzes to design Check Dam conducted among them Hydrology and Sedimentation Analysis, and Hydrolic Analysis. From the result of Hydrology and Sedimentation Analysis, the amount of sedimentation is 24,785 m3/s, the maximum flood discharge is 118,640 m3/s, the capacity of the river before sedimentation is 98,875 m3/s, and the river catch capacity after sedimentation 74,090 m3/s. From the results of Hydraulic Analysis, to determine the Elevation of the sediment containment barrier is based on the amount of sedimentation that occurs that is 24.785 m3/s. Meanwhile, to prevent flooding around the Check Dam site, a flood embankment is created based on the maximum flood discharge of 118.640 m3/s. Keywords: Check, Dam, Hydrology, Sedimentation, Hydrauli