[vc_empty_space][vc_empty_space]
Rainfall-runoff modeling of Citarum Hulu River Basin by using GR4J
Harlan D.a, Wangsadipura M.a, Munajat C.M.a
a Research Division of Water Resources Engineering, Faculty of Civil and Environmental Engineering, Institut Teknologi Bandung (ITB), Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]This research is to study the rainfall-runoff modeling using GR4J (Génie Rural à 4 paramètres Journalier) on Citarum Hulu River Basin. In this study, the data input of daily rainfall and potential evapotranspiration are used, and the result will calibrated with the observed data of daily discharge. In this study, the optimum value of GR4J model parameters will be observed to get the smallest error deviation. There are two stages in this modeling. Firstly is model calibration and secondly is model validation. Model calibration uses the first of five years of data input and model validation uses the following five years. The Nash-Sucliffe Coefficient (NS) and The Relative Volume Error (RVE) methods are used to obtain the error deviation. This study is intended to optimize four free parameters of the model, there is the maximum capacity of production store (X1), the groundwater exchange coefficient (X2), the maximum capacity of routing store (X3), and the time base of unit hydrograph (X 4). The last parameter (X4) is used to study flood discharge in the form of unit hydrograph analysis that uses linear reservoir cascade. In this study the result of GR4J method will be compared to another rainfall-runoff model, NRECA. This study uses gaged river basin, Citarum River Basin. Calibration uses the observed discharge data of Nanjung Station and based on the observed data of several rainfall stations inside the river basin. The result of this study shows that the first five years data has parameters quite similar with the second five years data. This shows rainfall and discharge patterns which are not changed significantly.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Daily discharge,Daily rainfall,Data input,Discharge patterns,Exchange coefficients,Flood discharge,Free parameters,GR4J method,Linear reservoirs,Model calibration,Model parameters,Model validation,NRECA,Observed data,Optimum value,Potential evapotranspiration,Rainfall-runoff,Rainfall-runoff modeling,Rainfall-runoff models,River basins,Two stage,Unit hydrograph[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Flood study,GR4J method,NRECA,Rainfall-runoff,Unit hydrograph[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]