Page - 292 - in Book of Full Papers - Symposium Hydro Engineering

EVALUATION AND MITIGATION OF THE BOGEL RIVER FLOOD, BLITAR, PROVINCE OF EAST JAVA, INDONESIA Aris Yhadhianto Civil Engineer, JASA TIRTA I PUBLIC CORPORATION, INDONESIA INDONESIA Ulie Mospar Dewanto Deputy of Operational II, JASA TIRTA I PUBLIC CORPORATION, INDONESIA ABSTRACT Bogel River located in Sutojayan area, Blitar, Province of East Java. It collected into the Brantas River about +1.5 km from the upstream of Lodoyo Dam. It have several subordo river in the upstream there are Kedungpuring River, Kedungunut River, Pijeran River, Kedungriwuk River, and several other subordo river. Seasonal type, Bogel River often overflow and impact of flood in the surrounding area, especially in Sutojayan area. Its because of the land condition in the catchment area already critical / bald and the silting up of the several suborder river in the upstream. Beside that Bogel River system is also used for irrigation. Jasa Tirta I Public Corporation have developed an early warning system and done the handling activities during flood events, although it’s not included in working area of the Jasa Tirta I Public Corporation. Mitigation of Bogel River flood until today just partial and emergency activities. So it is necessary for arrange the comprehensive and integrated study and flood mitigation management, supported by the Government and related stake holder. To get the right solution for mitigation the flood of the Bogel River, need a concept in all aspects and stages, so it can give the real benefits and on target. The method used are direct controlling by (a) operating the Lodoyo weir according to Dam Operational Guidelines, Procedures and Work Instructions of Flood Control, (b) arrange the evaluation for historical flood that ever happened, (c) arrange the concept of the proposed for flood mitigation by making the comprehensive study of flood mitigation, short term action 2016, middle term-long term cction, (d) completing the hydrology observation instruments in Bogel River 292