The robustness of conceptual rainfall-runoff modelling under climate variability – A review

Ji, Ho Seong; Mirzaei, Majid; Hin, Lai Sai; Dehghani, A A; Dehghani, Amin

doi:10.1016/j.jhydrol.2023.129666

Cited by 5 publications

(2 citation statements)

References 148 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In terms of numerical simulation of rainfall/runoff events, various studies have been conducted (Barbero et al 2022, Ji et al 2023, Nourani et al 2009, Shereif 2014, Guo et al 2023), however, there are a few studies focus on estimating time parameters. Currently, there is not a single method to predict or estimate TC with strong or high certainty that can be applicable in different climatic conditions and take all hydraulic variables into consideration.…”

Section: Introductionmentioning

confidence: 99%

A Novel Method for Estimating Time of Concentration in Ungauged Catchments

Fathi,

Zolghadr

2024

Water Resour Manage

View full text Add to dashboard Cite

Time of Concentration (TC) is one of the most frequently used time parameters in many hydrological studies. A good estimation of TC value results in a more precise design of expensive hydraulic structures, as well as a better estimation of ood discharge. There are the three available approaches to determine TC: physical, empirical, and graphical methods. Among these, graphical method is a widely accepted and popular among researchers for estimating TC. It is also considered as benchmark in TC studies. However, this method faces problems due to the lack of recorded data in many catchments. In this study, two-dimensional (2D) hydraulic simulation is studied and suggested as a novel technique for calculation of TC. The required input for 2D simulation can be obtained by using free satellite data. Some empirical formulas were also considered for calculating TC as well. The graphical method was used as a benchmark to evaluate the outputs of hydraulic simulation, and empirical formulas. To do this, four different watersheds were considered, with 28 rainfall-runoff events. In hydraulic simulation, TC was calculated as the time taken by a water parcel to travel from the upstream (headwater) to the downstream (outlet) of a watershed. The TC values obtained from the hydraulic simulation, and empirical formulas were compared with graphical method. It was observed that the maximum difference between the graphical method and the 2D simulation was less than 10% in all watersheds. Therefore, hydraulic simulation is a reliable method for calculating TC, especially in ungauged catchments where graphical method is not applicable.

show abstract

Section: Introductionmentioning

confidence: 99%

A Novel Method for Estimating Time of Concentration in Ungauged Catchments

Fathi,

Zolghadr

2024

Water Resour Manage

View full text Add to dashboard Cite

show abstract

“…After a certain stage of infiltration, the surface may produce accumulated water, which in turn generates runoff along the slope, Over the past half-century, with the continuous deepening of research on various elements in the process of rainwater movement, as well as the rapid development and application of technologies such as computers and geographic information systems (GIS), physical-based two categories of hydrological and hydrodynamic models have gradually developed to calculate runoff processes [15] . Hydrodynamic methods, such as two-dimensional hydraulic models, can obtain relatively accurate simulation results but require a large number of input parameters, the modelling process is complex, the solving process of differential equations is cumbersome, and the determination of numerical approximate solutions is challenging, which have limited Its practicality.…”

Section: Introductionmentioning

confidence: 99%

GIS and Cellular Automata Based Slope Rainwater Movement Process Model and its Application

Liu,

Chen,

Zhang

et al. 2023

Preprint

View full text Add to dashboard Cite

GIS and cellular automata based slope rainwater movement process model and its application

Liu,

Chen,

Zhang

et al. 2024

Sci Rep

View full text Add to dashboard Cite

Rainfall serves as a significant factor contributing to slope stability challenges in mountainous areas, and simulating the process of slope rainwater movement is a crucial approach for analyzing the stability of slopes triggered by rainfall. By combining computer numerical simulation technology with traditional hydraulic and hydrological calculation theories, it is possible to create an efficient and precise rainwater movement model that can simulate and analyze the process of rainwater movement on slopes. Utilizing natural slopes as the focal point of our research, the cellular automaton method was applied to simulate rainfall runoff on slopes, and a Cellular Automata (CA) based model for rainwater movement process was developed. This model modified the Green-Ampt (G-A) infiltration model by adopting an elliptical water content curve and introducing a coefficient that quantifies the ratio of saturated to unsaturated depth. Additionally, we refined the rules governing runoff generation and convergence within the slope and on its surface, enabling a comprehensive simulation of the entire rainwater movement process on the slope. Furthermore, the effectiveness of the model was validated through analytical solutions derived from simplified assumptions, laboratory experiments on infiltration and runoff in the flume, and a case study of a natural slope. The results show that the infiltration calculation results of the rainwater movement model are closer to the experimental values, and their overall values are slightly higher than the measured values, which are basically consistent with the model test results; The runoff calculation results show a phenomenon of initially increasing and gradually approaching the measured values compared to the measured values. When applying the model to an actual slope, it was found that the model comprehensively accounts for the influence of slope seepage, infiltration and runoff process, has better performance compared to G-A modified model. The model can be used to describe the spatial distribution and temporal variation of infiltration and runoff processes.

show abstract

The robustness of conceptual rainfall-runoff modelling under climate variability – A review

Cited by 5 publications

References 148 publications

A Novel Method for Estimating Time of Concentration in Ungauged Catchments

A Novel Method for Estimating Time of Concentration in Ungauged Catchments

GIS and Cellular Automata Based Slope Rainwater Movement Process Model and its Application

GIS and cellular automata based slope rainwater movement process model and its application

Contact Info

Product

Resources

About