Design hydrograph estimation in small and ungauged watersheds: continuous simulation method versus event‐based approach

Grimaldi, Salvatore; Petroselli, Andrea; Serinaldi, Francesco

doi:10.1002/hyp.8384

Cited by 71 publications

(62 citation statements)

References 30 publications

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“…Given a total rainfall depth and duration for a certain return period, the storm hyetograph determines the peak flow/time and the drainage capability demand in a catchment [5,6]. Therefore, the accurate representation of the storm hyetograph is significant for designing suitable drainage facilities and reducing the flooding risk in an urban catchment.…”

Section: Introductionmentioning

confidence: 99%

Improvement to the Huff Curve for Design Storms and Urban Flooding Simulations in Guangzhou, China

Pan

Wang

Liu

et al. 2017

Water

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Abstract:The storm hyetograph is critical in drainage design since it determines the peak flooding volume in a catchment and the corresponding drainage capacity demand for a return period. This study firstly compares the common design storms such as the Chicago, Huff, and Triangular curves employed to represent the storm hyetographs in the metropolitan area of Guangzhou using minute-interval rainfall data during 2008-2012. These common design storms cannot satisfactorily represent the storm hyetographs in sub-tropic areas of Guangzhou. The normalized time of peak rainfall is at 33 ± 5% for all storms in the Tianhe and Panyu districts, and most storms (84%) are in the 1st and 2nd quartiles. The Huff curves are further improved by separately describing the rising and falling limbs instead of classifying all storms into four quartiles. The optimal time intervals are 1-5 min for deriving a practical urban design storm, especially for short-duration and intense storms in Guangzhou. Compared to the 71 observed storm hyetographs, the Improved Huff curves have smaller RMSE and higher NSE values (6.43, 0.66) than those of the original Huff (6.62, 0.63), Triangular (7.38, 0.55), and Chicago (7.57, 0.54) curves. The mean relative difference of peak flooding volume simulated with SWMM using the Improved Huff curve as the input is only 2%, −6%, and 8% of those simulated by observed rainfall at the three catchments, respectively. In contrast, those simulated by the original Huff (−12%, −43%, −16%), Triangular (−22%, −62%, −38%), and Chicago curves (−17%, −19%, −21%) are much smaller and greatly underestimate the peak flooding volume. The Improved Huff curve has great potential in storm water management such as flooding risk mapping and drainage facility design, after further validation.

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Section: Introductionmentioning

confidence: 99%

Improvement to the Huff Curve for Design Storms and Urban Flooding Simulations in Guangzhou, China

Pan

Wang

Liu

et al. 2017

Water

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“…This method requires three basic assumptions; the selection of the design rainfall hyetograph (rainfall duration and time distribution), the selection of the antecedent soil moisture conditions before the storm event, and the equality of the return periods between the rainfall quantiles and computed flood quantiles [2,[11][12][13]. According to [14], even though the assumption that the return periods are equal between rainfall quantiles and simulated flood quantiles is not always acceptable [15], some researchers have found that the design storm method can produce acceptable peak discharge for a given return period if this method is used properly [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Flood Frequency Analysis for the Annual Peak Flows Simulated by an Event-Based Rainfall-Runoff Model in an Urban Drainage Basin

Ahn

Cho

Kim

et al. 2014

Water

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Abstract:The proper assessment of design flood is a major concern for many hydrological applications in small urban watersheds. A number of approaches can be used including statistical approach and the continuous simulation and design storm methods. However, each method has its own limitations and assumptions being applied to the real world. The design storm method has been widely used for a long time because of the simplicity of the method, but three critical assumptions are made such as the equality of the return periods between the rainfall and corresponding flood quantiles and the selections of the rainfall hyetograph and antecedent soil moisture conditions. Continuous simulation cannot be applied to small urban catchments with quick responses of runoff to rainfall. In this paper, a new flood frequency analysis for the simulated annual peak flows (FASAP) is proposed. This method employs the candidate rainfall events selected by considering a time step order of five minutes and a sliding duration without any assumptions about the conventional design storm method in an urban watershed. In addition, the proposed methodology was verified by comparing the results with the conventional method in a real urban watershed. OPEN ACCESSWater 2014, 6 3842 Keywords: design storm method; continuous simulation method; flood frequency analysis; urban drainage basin

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“…A disadvantage of the event based simulation is the required assumption about equal return periods for the design storm and the resulting design flood. This is usually not given, considering the required simplifying assumption about initial soil moisture conditions in the catchment, the shape and the critical duration of the design storm Verhoest et al, 2010;Grimaldi et al, 2012a). Using continuous rainfall-runoff simulation this problem can be avoided and the design flood is derived by flood frequency analysis of long series of simulated flows.…”

Section: U Haberlandt and I Radtke: Hydrological Model Calibration mentioning

confidence: 99%

Hydrological model calibration for derived flood frequency analysis using stochastic rainfall and probability distributions of peak flows

Haberlandt

Radtke

2014

Hydrol. Earth Syst. Sci.

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Abstract. Derived flood frequency analysis allows the estimation of design floods with hydrological modeling for poorly observed basins considering change and taking into account flood protection measures. There are several possible choices regarding precipitation input, discharge output and consequently the calibration of the model. The objective of this study is to compare different calibration strategies for a hydrological model considering various types of rainfall input and runoff output data sets and to propose the most suitable approach. Event based and continuous, observed hourly rainfall data as well as disaggregated daily rainfall and stochastically generated hourly rainfall data are used as input for the model. As output, short hourly and longer daily continuous flow time series as well as probability distributions of annual maximum peak flow series are employed. The performance of the strategies is evaluated using the obtained different model parameter sets for continuous simulation of discharge in an independent validation period and by comparing the model derived flood frequency distributions with the observed one. The investigations are carried out for three mesoscale catchments in northern Germany with the hydrological model HEC-HMS (Hydrologic Engineering Center's Hydrologic Modeling System). The results show that (I) the same type of precipitation input data should be used for calibration and application of the hydrological model, (II) a model calibrated using a small sample of extreme values works quite well for the simulation of continuous time series with moderate length but not vice versa, and (III) the best performance with small uncertainty is obtained when stochastic precipitation data and the observed probability distribution of peak flows are used for model calibration. This outcome suggests to calibrate a hydrological model directly on probability distributions of observed peak flows using stochastic rainfall as input if its purpose is the application for derived flood frequency analysis.

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Design hydrograph estimation in small and ungauged watersheds: continuous simulation method versus event‐based approach

Cited by 71 publications

References 30 publications

Improvement to the Huff Curve for Design Storms and Urban Flooding Simulations in Guangzhou, China

Improvement to the Huff Curve for Design Storms and Urban Flooding Simulations in Guangzhou, China

Flood Frequency Analysis for the Annual Peak Flows Simulated by an Event-Based Rainfall-Runoff Model in an Urban Drainage Basin

Hydrological model calibration for derived flood frequency analysis using stochastic rainfall and probability distributions of peak flows

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