Gilang Idfi, Wasis Wardoyo
Ngotok Ring Kanal river is a natural channel that acts as the water body of thirteen river branches and three drainage outlets. The catchment area of Ngotok Ring Kanal River is about 722 km2. This river is important for Mojokerto District since it plays an important role in controlling the yearly flood. Many efforts have been done to solve this flood problem but it remains to unsolve satisfactorily yet. Therefore, a research is taken to give one other possibility to overcome the flood effects caused by very high discharge peak at every rainy season. The aim of this research is to distribute the discharge peak by creating some scenarios on releasing the amount of discharge by building a pond at any river branch. By these, it can be known the best scenario of distributing the discharge peak based on the time of release and the place of the built pond. It offers 5 scenarios a number of ponds i.e. by simulating 2 ponds, 3 ponds, 5 ponds at any river banks respectively. The result of the study showed that scenario-5 with 5 ponds is the best scenario to reduce the peak discharge of Ngotok Ring Kanal River. This scenario becomes to reduce the peak discharge from 566.702 m3 become 454.88 m3s. © 2017 Author(s).
Department of Civil Engineering, State University of Malang, Indonesia; Department of Civil Engineering, Sepuluh Nopember Institute of Technology, Surabaya, Indonesia
