MANIPULATION OF FLOOD CONTROL CHANNEL PROFILE IN THE KEK LIKUPANG, PANTAI PULISAN, INDONESIA

Flood, erosion, and sedimentation have become classic problems in the river. The two main parameters that significantly affect phenomenon of flood are flow sediment. Flood sediment transport cause aggradation degradation river bed, bring bad influence to construction environment. Therefore, it becomes important conduct manipulation control channel profile selected area Special Economic Area (KEK) is Likupang, Pantai Pulisan. This research intends obtain design shape dimension for controlling disasters influenced by factors environment, water resources, climate change. One urgent this produce a design/recommendation minimizing negative impact triggered floods transport, so causes disaster geology ecology. To reach aim, we carried out survey existing conditions determining suitability analysis will be used. rainfall watershed characteristics input HEC-HMS software obtaining flood. Additionally, there measurement/mapping geometry. used application HEC-RAS simulate real-time condition field. Based on results manipulation, obtained multi-stage trapezoid with an upper width (La) 10 m, lower (Lb) 1 depth (h) 3 m can amount 36.5 m3/s (Q25). information recommendation/reference management method environment resources Economy (EK) Likupang tourism-Pantai Pulisan as super-priority tourism destination making effort mitigation