@article{Dony Faturochman Saefulloh_Iwan K. Hadihardaja_Dhemi Harlan_2018, title={MODELING OF TRIANGULAR UNIT HYDROGRAPHS USING AN ARTIFICIAL NEURAL NETWORK IN A TROPICAL RIVER BASIN}, volume={15}, url={https://geomatejournal.com/geomate/article/view/1008}, abstractNote={<p>Rainfall-runoff models are crucial for estimating floods in a river basin. Most watersheds in <br>Indonesia have a data deficiency problem, especially in natural watersheds (ungauged river basins), which may <br>affect the accuracy of design and planning of water resources. Most synthetic unit hydrograph methods are not in <br>accordance with the characteristics of Indonesian watersheds, and adjustments should be made to obtain accurate <br>results. This study aimed to develop a simple triangular unit hydrograph generated by using a neural network for <br>different watersheds in Indonesia. The triangular unit hydrograph consists of the peak discharge, time to peak, and <br>time base developed using a neural network with a learning process from the observed unit hydrograph, and the <br>result will be compared to the Snyder-Alexeyev synthetic unit hydrograph after being adjusted to obtain accurate <br>results in comparison to observed data. An artificial neural network (ANN) model was developed by inputting <br>basin characteristics such as catchment area (A), river length (L), basin slope (S), shape factor (F), and runoff <br>coefficient (C). The model will generate the output of a triangular synthetic unit hydrograph consisting of peak <br>discharge (Qp), time to peak (Tp), and time base (Tb). A case study is discussed in tropical river basins mostly on <br>Java Island, where flood events are frequent. The simulation result from applying an ANN using generalized <br>reduced gradient neural network (GRGNN) methods is significantly in line with historical data. The ANN <br>simulation shows more accurate results than the adjusted Snyder-Alexeyev unit hydrograph. The results indicated<br>that the synthetic unit hydrograph generated by an ANN can be applied to an ungauged river basin.</p>}, number={51}, journal={GEOMATE Journal}, author={Dony Faturochman Saefulloh and Iwan K. Hadihardaja and Dhemi Harlan}, year={2018}, month={May}, pages={69–76} }