Comparison of design peak flow estimation methods for ungauged basins in Iran

Petroselli, Andrea; Asgharinia, Shahla; Sabzevari, T.; Saghafian, Bahram

doi:10.1080/02626667.2019.1686506

Cited by 20 publications

(7 citation statements)

References 49 publications

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“…Q mi − Q m Q mi (21) where Q mi is the design value of time series decomposition or synthesis and mixture distribution model, and Q m is the design value of traditional line fitting method.…”

Section: E = 100mentioning

confidence: 99%

“…Rainfall and runoff are complex processes, so hydrologists are still struggling to find the most appropriate models and methods of frequency calculation. Several studies have shown [21][22][23][24][25] that hydrological calculation added geomorphological properties would make the results more accurate. Therefore, this study incorporates the evolution of land use types and changes in flows before and after construction to calibrate and validate the theoretical diagnostic results with relevant data information.…”

Section: Introductionmentioning

confidence: 99%

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Method Consideration of Variation Diagnosis and Design Value Calculation of Flood Sequence in Yiluo River Basin, China

et al. 2020

Water

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The conventional approaches of the design flood calculation are based on the assumption that the hydrological time series is subject to the same distribution in the past, present, and future, i.e., the series should be consistent. However, the traditional methods may result in overdesign in the water conservancy project since the series has non-stationary variations due to climate change and human activities. Therefore, it is necessary to develop a new approach for frequency estimation of non-stationary time series of extreme values. This study used four kinds of mutation test methods (the linear trend correlation coefficient, Mann–Kendall test, sliding t-test, and Pettitt test) to identify the trend and mutation of the annual maximum flow series (1950–2006) of three hydrological stations in the Yiluo River Basin. Then we evaluated the performance of two types of design flood methods (the time series decomposition-synthesis method, the mixed distribution model) under the impacts of climate change and human activities on hydro-meteorological conditions. The results showed that (a) the design flood value obtained by the time series decomposition-synthesis method based on the series of the backward restore is larger than that obtained by the decomposition synthesis method based on the series of the forward restore; (b) when the return period is 100 years or less, the design flood value obtained by the mixed distribution model using the capacity ratio parameter estimation method is less than that obtained by the hybrid distribution model with simulated annealing parameter estimation method; and (c) both methods can overcome sequence inconsistency in design frequencies. This study provides insight into the frequency estimation of non-stationary time series of extreme values under the impacts of climate change and human activities on hydro-meteorological conditions.

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Section: E = 100mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Method Consideration of Variation Diagnosis and Design Value Calculation of Flood Sequence in Yiluo River Basin, China

et al. 2020

Water

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“…Indeed, hydraulic structures engineering should involve and respond to the increasing demands for sustainability to reverse the challenges of today and the future (Erpicum et al, 2021). Although obtaining runoff estimation in ungauged catchments is very important when designing hydraulic structures, it is indeed a challenging problem to predict runoff for these basins because of the difficulty in obtaining adequate historical flow observations (Petroselli et al, 2020). A recent study (Umukiza et al, 2021) evaluated future projections on the Narok town watershed in terms of LULC scenarios and related design flows for the best mitigation of floods and effective land planning.…”

Section: Introductionmentioning

confidence: 99%

Drainage systems design in urbanized areas under land use changes scenarios: case study of Narok Town (Kenya)

Umukiza¹,

Raude²,

Petroselli³

et al. 2022

ahs

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Land use/land cover (LULC) changes due to urbanization have a strong influence on runoff process. In the case of Narok town, in Kenya, several flash floods have caused human losses and economic damages. Design hydrograph and its peak flow are the key elements to determine hydraulic geometrical properties in designing an adequate drainage system. In consideration of LULC changes and consequent hydrograph variability, in this study existing channel geometric properties were verified, using field measurements through a ground survey employing Real-Time Kinematic equipment at Kakia and Esamburmbur channels of Narok town. To improve the drainage system, the evaluated peak flows under assumed future LULC scenarios were used to design hydraulic properties for a sustainable urban drainage system. Three hydrological/hydraulic models (EBA4SUB, Manning's equation, and Civil 3D) were used under different LULC scenarios for computing channel geometry and correspondent water level. The change in channel geometry was found to obstruct free flow for different scenarios of peak discharge and flow volume. The presented results could be used to support the design of storm water drainage systems by local authorities, in order to mitigate flood hazards and consequently to reduce the hydraulic risk.

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“…Surface runoff (SF) is usually the most important of such three components. Many rainfall-runoff models have been proposed to compute the surface flow of ungauged catchments (Menberu et al , 2014, Sabzevari, 2017Keshtkaran et al, 2018;Petroselli et al, 2020a, b;Dehghanian et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Separation of surface flow from subsurface flow in catchments using runoff coefficient

et al. 2021

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Separating surface flow (SF) from subsurface flow (SSF) based on direct runoff measurements in river gauges is an important issue in hydrology. In this study, we developed a simple and practical method, based on runoff coefficient (RC), for separating SF from SSF. RC depends mainly on soil texture, land use and land cover, but we also considered the effect of slope and rainfall intensity. We assessed our RC-based method for three different soil types by comparing the value obtained with laboratory rainfall simulator data. The correlation coefficient between observed and calculated data exceeded 0.93 and 0.63 when estimating SF and SSF respectively .The method was then used to separate SF and SSF in two catchments (Heng-Chi and San-Hsia) in Northern Taiwan, and the results were compared with those produced by the geomorphological instantaneous unit hydrograph (GIUH) model. Test revealed that, if RC is calculated accurately, the proposed method can satisfactorily separate SF from SSF at catchment scale .

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Comparison of design peak flow estimation methods for ungauged basins in Iran

Cited by 20 publications

References 49 publications

Method Consideration of Variation Diagnosis and Design Value Calculation of Flood Sequence in Yiluo River Basin, China

Method Consideration of Variation Diagnosis and Design Value Calculation of Flood Sequence in Yiluo River Basin, China

Drainage systems design in urbanized areas under land use changes scenarios: case study of Narok Town (Kenya)

Separation of surface flow from subsurface flow in catchments using runoff coefficient

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