Page - 293 - in Book of Full Papers - Symposium Hydro Engineering

System. By these integrated flood mitigation concepts in Bogel River will completing the efforts that have been done by Jasa Tirta I Public Corporation, directly and emergency action by participation from all stakeholders according to the authority. By normalitation of the condition and function of the existing water resources infrastructure, the flood control system can be implemented optimally. Of course, the real efforts can be realized so as to built the preparedness for possible flood and reduce the impact that especially for regions and communities in the district Sutojayan, Blitar. It is also become the responsibility of Jasa Tirta I Public Corporation in water resources integrated management. Keywords : flood, mitigation management, Lodoyo weir, Bogel River INTRODUCTION The existence of Bogel River is expected by communities around the watershed to support the needs of water mainly for irrigation. Bogel River watershed with a total area of 54.4 km2 is a catchment rivers with a total length of 14.4 km. Bogel River system consists of three main tributaries namely Unut River, Gondang River, and Rau River with a meeting point in the Area / District Sutojayan. Most of area in Bogel watershed is relatively gentle slopes and even tend to be flat and partly is hilly area with 60% of deforested conditions. The shape of the watershed is wide/dilated which have a large flood peaks and short flood peak time, so it could potentially have a high flood peak discharge. The rapid of development with community activities around the watershed, the river's capacity is no longer sufficient to be function as drainage channels. Besides that reducing capacity because of sedimentation, especially in the estuary and the effect of water level fluctuations of Brantas River in the upstream Lodoyo Dam is also a cause which must be anticipated. (Department of Public Works.,2005) Figure 1. Location map of Bogel River Bendu ngan Wlingi Lodoyo Dam Wlingi Dam Bogel River 293