Population growth every year causes settlements and buildings expansion size. Hence land cover composition also changes. Based on recent year trends, size area of impermeability land cover rises; therefore, surface runoff discharge surges. This study aimed to compare Cilangla River Basin flood discharge caused by land cover effect change in 2014 and 2019. Land cover change was analyzed by using Landsat 8 in 2014 and 2019 through a supervised classification method. Rainfall intensity was determined by considering return period according to Log Pearson III distribution. Selected rainfall distribution as a result of frequency analysis was evaluated using Chi-Squared and Smirnov-Kolmogorov methods. Alternating Block Methods (ABM) and Tadashi Tanimoto were applied to determine hourly rainfall distribution. Soil Conservation Service (SCS) and Nakayasu methods were employed for synthetic unit hydrographs. The land cover analysis yielded insignificant changes by obtaining a curve number value in 2014 of 74.595 and 2019 of 74.795. Based on the applied method, the highest flood discharge value was produced by SCS synthetic unit hydrograph method, peak flood discharge value in 2014 was 1136.155 m3/second, and in 2019 was 1141.708 m3/second.

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