Extreme Event-based Rainfall-runoff Simulation Utilizing GIS Techniques in Irawan Watershed, Palawan, Philippines

Cacal, Jennifer C.; Austria, Victor Czar A.; Taboada, Evelyn B.

doi:10.28991/cej-2023-09-01-017

Cited by 7 publications

(2 citation statements)

References 41 publications

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“…Hydrological modeling is now the best method for ensuring sustainability and watershed management, as well as guarding against extremal events in catchment. Several free modeling software programs have been developed and spread during the last two decades, of which the most commonly used for small catchments are the Nash model and HEC-HMS [27].…”

Section: Introductionmentioning

confidence: 99%

“…More often, however, modeling is done for controlled catchments, where model data are used for comparison with observed data, as presented in his work by Yan [41] for the Qingjiang River and Jennifer et al [27] for the Irawan Watershed. The HEC-HMS model has gained popularity in recent years due to the full automation of the model as opposed to the Nash model.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Two Hydrological Models, the HEC-HMS and Nash Models, for Runoff Estimation in Michałówka River

et al. 2023

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Floods are among the most devastating natural disasters in small suburban catchments. These phenomena, causing loss of life and massive property damage, pose a serious threat to the economy. Hydrological modeling is extremely important in terms of climate change, and the use of appropriate modeling can be a useful tool for flood risk prevention and mitigation. Rainfall–runoff modeling requires the selection of an appropriate hydrological model in order to obtain satisfactory results. Hydrological models are used in water resource planning and management to estimate catchment runoff. Small uncontrolled catchments play a particularly important role in hydrological phenomena, since changes in them affect flows in the recipient. Hydrologists are particularly interested in developing hydrological models that can be made with a minimum of data and parameters. Nash models and the Hydrologic Engineering Center-Hydrologic Modeling System (HEC-HMS) are examples of simple and most practical hydrologic models. These models were used in this paper to study geographic and qualitative changes in precipitation runoff due to land cover changes. The modeling was carried out for two spatial aspects relating to the years 1940 and 2018. The model allowed for the simulation of the river flow that can occur under different rainfall probabilities. The analysis of the results was used to evaluate the hydrological models used. The hundred-year flow modeled with the Nash model for 1940 was 13.4 m3∙s−1, whereas the second model gave slightly lower flow values. In addition, modeling the flow for 2018 (after changing the land cover) highlighted the increase in the flow value for both models, where again the flow volume was slightly higher for the Nash model and amounted to about 19 m3∙s−1. The flow differences for individual models were not too large. This made it possible to conclude that the simulated outflow hydrographs are in good agreement, and this means that the models accurately reproduce the flow of the Michałówka River. The study showed that rapid urbanization adversely affects hydrological processes. In addition, the study showed that a well-distributed model can outperform a global flood forecasting model, especially in terms of magnitude, as in the current study example.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%