TY - JOUR N2 - A flood occurs for many reasons, such as excessive rainfall, runoff coefficient, or an insufficient river channel capacity. The discharge flowing through the floodway depends on the maximum main river dimension that can be normalized. LU/LC changes are affected by runoff discharge, and runoff discharge is affected by the floodway design. The study dis-cusses the effect of land use (LU) or land cover (LC) changes and the design of floodway channel dimensions in the Kali Kemuning watershed, East Java Province, Indonesia. The Nakayasu synthetic unit hydrograph has been used to analyse the runoff discharge, and the Hydrologic Engineering Center’s River Analysis System software analysed the hydraulic proper-ties of river and floodway channels. Results show that the floodway channel design is determined by LU/LC conditions, and the river channel is normalized toward its maximum dimensions. Normalized channel depths and widths vary from 4 to 7 m and 16 to 46 m, respectively. The floodway channel is rectangular, with a bottom width of 10 m and depth of 4.5 m. With the runoff coefficient equal to 0.75, these normalized channel and floodway dimensions are suitable for the flood up to the 100-year return period runoff discharge. L1 - http://journals.pan.pl/Content/120136/30%20Suharyanto%20et%20al%20750.pdf L2 - http://journals.pan.pl/Content/120136 PY - 2021 IS - No 49 EP - 266 DO - 10.24425/jwld.2021.137120 KW - channel dimensions KW - channel normalization KW - floodway KW - land cover changes KW - land use KW - runoff coefficient A1 - Suharyanto, Agus A1 - Devia, Yatnanta P. A1 - Wijatmiko, Indradi PB - Polish Academy of Sciences; Institute of Technology and Life Sciences - National Research Institute DA - 2021.07.01 T1 - Floodway design affected by land use changes in an urbanized area SP - 259 UR - http://journals.pan.pl/dlibra/publication/edition/120136 T2 - Journal of Water and Land Development ER -