Abstract
Abstract Kali Lamong River with a trapezoidal channel shape has a bottom width of about 30 m, a top width of 40 m and a depth of 3.5 m. In one of the river segments, the basis is in the form of a fixed bed and it is assumed that there is no sediment transport in this section. On the downstream side after the fixed bed section, the river segment is a mobile bed with river bed material that has an average grain diameter of 1.5 mm, a relative mass density of 2.6, and porosity of 0.3. Flowrate with Q50 is 1000.00 m3/sec with a maximum flow speed of 15 m/sec. Riverbed degradation will occur initially at the upstream point in the fixed and mobile beds. Depth of riverbed degradation calculated by the Parabolic model of 80.00 cm / year based on the solution of the equation.
Highlights
The Lamong River has a watershed area of 720 km2 with a river length reaching ± 103 km which has river mouth into the Madura Strait
The Kali Lamong River Basin in the upstream area includes Lamongan and Mojokerto Regencies as well as Surabaya City and Gresik Regency located in the downstream area
Depth of riverbed degradation can be calculated by the Parabolic Model [7] based on the completion of the equation:
Summary
The Lamong River has a watershed area of 720 km with a river length reaching ± 103 km which has river mouth into the Madura Strait. The Kali Lamong River Basin in the upstream area includes Lamongan and Mojokerto Regencies as well as Surabaya City and Gresik Regency located in the downstream area. Of these areas, 310.12 km or 44% of the Kali Lamong watershed is in Gresik Districts. Based on the sub-watershed location, flood tracing was conducted from the upstream of Lamong River to the downstream of the Lamong River. The watershed area is one of the parameters in the flood discharge analysis in a cross section. Based on the calculation of rainfall intensity with a certain period, the planned flood discharge can be calculated. The planned flood discharge is calculated using the Nakayasu synthetic unit hydrograph
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
