Selecting Parameter Values for the AWBM Daily Rainfall-Runoff Model for Use on Ungauged Catchments

This paper deals with flood estimation in ungauged catchment using continuous rainfall-runoff model. The rainfall-runoff model used in this study is developed based on the ENKI hydrological framework. In this study, flood estimation in ungauged catchment is based on transfer of parameter values from nearby station. The catchment used in this study to test the suitability of the ENKI system in flood estimation of ungauged catchment is the Gaula catchment located in Norway. This catchment has three main sub-catchments where flow records are available. The ENKI system is calibrated for each sub-catchment. In order to test its suitability in flood estimation, the average of the parameter set obtained from any of the two sub-catchments is used in the remaining sub-catchments. The performance of the ENKI system in flood estimation is evaluated in terms of the Nash–Sutcliffe (NSE) model efficiency index and the model ability to simulate the daily observed Annual Maximum Series (AMS). The result of this study shows that the ENKI framework has considerable potential in flood estimation in ungauged catchments.

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Impact of downscaled rainfall biases on projected runoff changes

Hydrology and Earth System Sciences ◽

10.5194/hess-24-2981-2020 ◽

2020 ◽

Vol 24 (6) ◽

pp. 2981-2997

Author(s):

Stephen P. Charles ◽

Francis H. S. Chiew ◽

Nicholas J. Potter ◽

Hongxing Zheng ◽

Guobin Fu ◽

...

Keyword(s):

Water Supply ◽

Grid Point ◽

Daily Rainfall ◽

Rainfall Runoff ◽

Rainfall Frequency ◽

Rainfall Runoff Model ◽

Projected Changes ◽

Runoff Model ◽

Regional Water

Abstract. Realistic projections of changes to daily rainfall frequency and magnitude, at catchment scales, are required to assess the potential impacts of climate change on regional water supply. We show that quantile–quantile mapping (QQM) bias-corrected daily rainfall from dynamically downscaled WRF simulations of current climate produce biased hydrological simulations, in a case study for the state of Victoria, Australia (237 629 km2). While the QQM bias correction can remove bias in daily rainfall distributions at each 10 km × 10 km grid point across Victoria, the GR4J rainfall–runoff model underestimates runoff when driven with QQM bias-corrected daily rainfall. We compare simulated runoff differences using bias-corrected and empirically scaled rainfall for several key water supply catchments across Victoria and discuss the implications for confidence in the magnitude of projected changes for mid-century. Our results highlight the imperative for methods that can correct for temporal and spatial biases in dynamically downscaled daily rainfall if they are to be suitable for hydrological projection.

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The HYDROMED model and its application to semi-arid Mediterranean catchments with hill reservoirs 2: Rainfall-runoff model applications to three Mediterranean hill reservoirs

Hydrology and Earth System Sciences ◽

10.5194/hess-5-554-2001 ◽

2001 ◽

Vol 5 (4) ◽

pp. 554-562 ◽

Cited By ~ 8

Author(s):

R. Ragab ◽

D. Moidinis ◽

J. Albergel ◽

J. Khouri ◽

A. Drubi ◽

...

Keyword(s):

Goodness Of Fit ◽

Model Performance ◽

Limited Information ◽

Rainfall Runoff ◽

Significant Events ◽

Reliable Parameter ◽

Rainfall Runoff Model ◽

Parameter Values ◽

Runoff Model

Abstract. The objective of this work was to assess the performance of the newly developed HYDROMED model. Three catchments with hill reservoirs were selected. They are El-Gouazine and Kamech in Tunisia and Es Sindiany in Syria. The rainfall, the spillway flow and volume of water in the reservoirs were used as input to the model. Events that generated spillway flow were preferred for calibration. The results confirmed that the HYDROMED model is capable of reproducing the runoff volume at all the three sites. In calibrating single events, the model performance was high as measured by the Nash-Sutcliffe criterion for goodness of fit. In some events this value was as high as 98%. In simulation mode, the highest Nash-Sutcliffe criterion value was close to 70% in the El-Gouazine and Kamech catchments and close to 50% in the Es Sindiany catchment. Given the limited information available, especially on the unrecorded releases in the three catchments, the hydrological impact of site geology (e.g. Kamech), the unrecorded operator intervention during the spillway flow (e.g. Es Sindiany) and other unaccounted factors (e.g siltation, evaporation, etc.), these results are by and large very encouraging. However, they could be further improved as and when more information on the unrecorded parameters becomes available. Additionally, the results of this work highlighted the need for long term records with a large number of significant events that are able to generate spillway flow to obtain more consistent and reliable parameter values. It also highlights the need for more accurately recorded releases for irrigation and other uses. As these results are encouraging, more tests on those three and other sites are planned. Keywords: HYDROMED, rainfall-runoff model, Mediterranean, conceptual model

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Preliminary Study of Computational Time Steps in a Physically Based Distributed Rainfall–Runoff Model

Water ◽

10.3390/w10091269 ◽

2018 ◽

Vol 10 (9) ◽

pp. 1269 ◽

Cited By ~ 3

Author(s):

Yun Choi ◽

Mun-Ju Shin ◽

Kyung Kim

Keyword(s):

Optimal Parameter ◽

Computational Time ◽

Rainfall Runoff ◽

Runoff Simulation ◽

Stream Network ◽

Time Step ◽

Simulation Results ◽

Rainfall Runoff Model ◽

Parameter Values ◽

Runoff Model

The choice of the computational time step (dt) value and the method for setting dt can have a bearing on the accuracy and performance of a simulation, and this effect has not been comprehensively researched across different simulation conditions. In this study, the effects of the fixed time step (FTS) method and the automatic time step (ATS) method on the simulated runoff of a distributed rainfall–runoff model were compared. The results revealed that the ATS method had less peak flow variability than the FTS method for the virtual catchment. In the FTS method, the difference in time step had more impact on the runoff simulation results than the other factors such as differences in the amount of rainfall, the density of the stream network, or the spatial resolution of the input data. Different optimal parameter values according to the computational time step were found when FTS and ATS were used in a real catchment, and the changes in the optimal parameter values were smaller in ATS than in FTS. The results of our analyses can help to yield reliable runoff simulation results.

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Conceptual Rainfall–Runoff Model Performance with Different Spatial Rainfall Inputs

Journal of Hydrometeorology ◽

10.1175/2011jhm1340.1 ◽

2011 ◽

Vol 12 (5) ◽

pp. 1100-1112 ◽

Cited By ~ 36

Author(s):

J. Vaze ◽

D. A. Post ◽

F. H. S. Chiew ◽

J.-M. Perraud ◽

J. Teng ◽

...

Keyword(s):

Model Simulation ◽

Model Performance ◽

Daily Rainfall ◽

Grid Cell ◽

Rainfall Series ◽

Data Availability ◽

Rainfall Time Series ◽

Rainfall Runoff ◽

Rainfall Runoff Model ◽

Runoff Model

Abstract Different methods have been used to obtain the daily rainfall time series required to drive conceptual rainfall–runoff models, depending on data availability, time constraints, and modeling objectives. This paper investigates the implications of different rainfall inputs on the calibration and simulation of 4 rainfall–runoff models using data from 240 catchments across southeast Australia. The first modeling experiment compares results from using a single lumped daily rainfall series for each catchment obtained from three methods: single rainfall station, Thiessen average, and average of interpolated rainfall surface. The results indicate considerable improvements in the modeled daily runoff and mean annual runoff in the model calibration and model simulation over an independent test period with better spatial representation of rainfall. The second experiment compares modeling using a single lumped daily rainfall series and modeling in all grid cells within a catchment using different rainfall inputs for each grid cell. The results show only marginal improvement in the “distributed” application compared to the single rainfall series, and only in two of the four models for the larger catchments. Where a single lumped catchment-average daily rainfall series is used, care should be taken to obtain a rainfall series that best represents the spatial rainfall distribution across the catchment. However, there is little advantage in driving a conceptual rainfall–runoff model with different rainfall inputs from different parts of the catchment compared to using a single lumped rainfall series, where only estimates of runoff at the catchment outlet is required.

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Bayesian estimation of extreme flood quantiles using a rainfall-runoff model and a stochastic daily rainfall generator

Journal of Hydrology ◽

10.1016/j.jhydrol.2017.09.003 ◽

2017 ◽

Vol 554 ◽

pp. 137-154 ◽

Cited By ~ 9

Author(s):

Veber Costa ◽

Wilson Fernandes

Keyword(s):

Bayesian Estimation ◽

Daily Rainfall ◽

Rainfall Runoff ◽

Extreme Flood ◽

Flood Quantiles ◽

Rainfall Runoff Model ◽

Runoff Model

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Climate change model as a decision support tool for water resources management in northern Iraq: a case study of Greater Zab River

Journal of Water and Climate Change ◽

10.2166/wcc.2017.083 ◽

2017 ◽

Vol 10 (1) ◽

pp. 197-209 ◽

Cited By ~ 1

Author(s):

Y. Osman ◽

N. Al-Ansari ◽

M. Abdellatif

Keyword(s):

Climate Change ◽

Water Management ◽

Daily Rainfall ◽

Decision Support Tool ◽

Northern Region ◽

Future Climate Change ◽

Rainfall Runoff ◽

Support Tool ◽

Rainfall Runoff Model ◽

Runoff Model

Abstract The northern region of Iraq heavily depends on rivers, such as the Greater Zab, for water supply and irrigation. Thus, river water management in light of future climate change is of paramount importance in the region. In this study, daily rainfall and temperature obtained from the Greater Zab catchment, for 1961–2008, were used in building rainfall and evapotranspiration models using LARS-WG and multiple linear regressions, respectively. A rainfall–runoff model, in the form of autoregressive model with exogenous factors, has been developed using observed flow, rainfall and evapotranspiration data. The calibrated rainfall–runoff model was subsequently used to investigate the impacts of climate change on the Greater Zab flows for the near (2011–2030), medium (2046–2065), and far (2080–2099) futures. Results from the impacts model showed that the catchment is projected to suffer a significant reduction in total annual flow in the far future; with more severe drop during the winter and spring seasons in the range of 25 to 65%. This would have serious ramifications for the current agricultural activities in the catchment. The results could be of significant benefits for water management planners in the catchment as they can be used in allocating water for different users in the catchment.

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Investigation of the performance of a simple rainfall disaggregation scheme using semi-distributed hydrological modelling of the Lee catchment, UK

Hydrology Research ◽

10.2166/nh.2010.091 ◽

2010 ◽

Vol 41 (2) ◽

pp. 134-144

Author(s):

Marie-Laure Segond ◽

Howard S. Wheater ◽

Christian Onof

Keyword(s):

Daily Rainfall ◽

Rainfall Runoff ◽

Rain Gauges ◽

Expected Performance ◽

Hourly Data ◽

Temporal Disaggregation ◽

Rainfall Runoff Model ◽

Event Based ◽

Spatially Varying ◽

Runoff Model

A simple and practical spatial–temporal disaggregation scheme to convert observed daily rainfall to hourly data is presented, in which the observed sub-daily temporal profile available at one gauge is applied linearly to all sites over the catchment to reproduce the spatially varying daily totals. The performance of the methodology is evaluated using an event-based, semi-distributed, nonlinear hydrological rainfall–runoff model to test the suitability of the disaggregation scheme for UK conditions for catchment sizes of 80–1,000 km2. The joint procedure is tested on the Lee catchment, UK, for five events from a 12 year period of data from 16 rain gauges and 12 flow stations. The disaggregation scheme generally performs extremely well in reproducing the simulated flow for the natural catchments, although, as expected, performance deteriorates for localized convective rainfall. However, some reduction in performance occurs when the catchments are artificially urbanised.

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Calibration of hydrological model parameters for ungauged catchments

Hydrology and Earth System Sciences ◽

10.5194/hess-11-703-2007 ◽

2007 ◽

Vol 11 (2) ◽

pp. 703-710 ◽

Cited By ~ 223

Author(s):

A. Bárdossy

Keyword(s):

Hydrological Model ◽

Model Performance ◽

Model Parameters ◽

Hydrological Models ◽

Rainfall Runoff ◽

Ungauged Catchments ◽

Rainfall Runoff Model ◽

Climate Statistics ◽

Runoff Model ◽

German Part

Abstract. The parameters of hydrological models for catchments with few or no discharge records can be estimated using regional information. One can assume that catchments with similar characteristics show a similar hydrological behaviour and thus can be modeled using similar model parameters. Therefore a regionalisation of the hydrological model parameters on the basis of catchment characteristics is plausible. However, due to the non-uniqueness of the rainfall-runoff model parameters (equifinality), a workflow of regional parameter estimation by model calibration and a subsequent fit of a regional function is not appropriate. In this paper a different approach for the transfer of entire parameter sets from one catchment to another is discussed. Parameter sets are considered as tranferable if the corresponding model performance (defined as the Nash-Sutclife efficiency) on the donor catchment is good and the regional statistics: means and variances of annual discharges estimated from catchment properties and annual climate statistics for the recipient catchment are well reproduced by the model. The methodology is applied to a set of 16 catchments in the German part of the Rhine catchments. Results show that the parameters transfered according to the above criteria perform well on the target catchments.

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