The relationship between land use change and flood flows, a case study in a transboundary watershed

Authors

DOI:

https://doi.org/10.31637/epsir-2024-1385

Keywords:

Flood flows, hydrological model, HMS, land use change scenarios, TerrSet, transboundary basin, rain – runoff, Zarumilla

Abstract

Introduction: Introduction: The HEC-HMS model was applied in the transboundary basin of the Zarumilla River (Ecuador – Peru) to simulate the flows that would occur during maximum precipitation events. Methodology: The model integrated the precipitation determined by intensity equations, the infiltration defined by the curve number, the rain - runoff transformation by unit hydrographs, the hydrological routing calculated by applying Muskingum - Cunge and was calibrated by a frequency analysis using the hydrometric information available. Results: The model was executed satisfactorily and the resulting maximum flows at the outlet of the basin varied between 1.100 m3/s and 1.670 m3/s depending on the return period. A land use scenario for the year 2027 was generated using information from 2014 and 2017 that was evaluated with the model. Discussion: The transitions with the largest area of influence observed were pasture to crop, forest to crop and crop to pasture. Other classifications do not present a significant change. Conclusions: The flows calculated with the coverage of the generated scenario are lower than those calculated for 2017, due to the expansion of crops, which are mostly fruit crops. Despite this, the variation in flow rates was not very significant.

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Author Biographies

Fernando Oñate-Valdivieso, Universidad Técnica Particular de Loja

Doctor in Hydrology from the University of Alcalá (Spain). Civil Engineer from the Universidad Técnica Particular de Loja (UTPL) (Ecuador). University professor since 1999 at UTPL. Principal professor of the subjects of hydrology, geographic information systems in undergraduate and postgraduate. He has been principal investigator and director of projects funded by national and international government and research entities. He has extensive experience in hydrological modeling applied to the water resources management, infrastructure design and risk prevention. He has been Director of the department of Geology, Mines and Civil Engineering and Director of the Water Resources Master Program at UTPL. He is the author of scientific publications in scientific journals and book chapters.

Arianna Oñate-Paladines, Universidad Técnica Particular de Loja

Civil Engineer interested in water resources management, hydrological and hydraulic modelling, as well as data science and machine learning applied to water resources. She earned her Master of Science in Hydro-Informatics with high honors in 2020 from the EuroAquae University Consortium: Newcastle University (UK), Universitat Politècnica de Catalunya (Spain), Université Nice Sophia Antipolis (France), Politechnika Warszawska (Poland) and Brandenburg University of Technology (Germany). She has worked on research and development projects led by renowned international research centers such as Deltares (Netherlands) and the École Polytechnique Fédérale de Lausanne (Switzerland), on topics related to hydrological forecasting and computational fluid dynamics modelling. In her home country, she has worked as former associate lecturer at Universidad Técnica Particular de Loja. She currently holds the position of Water Resources Engineer at WSP Golder Australia, performing dam break, water balance and automated large-scale assessments.  

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Published

2024-11-12

How to Cite

Oñate-Valdivieso, F., & Oñate-Paladines, A. (2024). The relationship between land use change and flood flows, a case study in a transboundary watershed. European Public & Social Innovation Review, 9, 1–17. https://doi.org/10.31637/epsir-2024-1385

Issue

Vol. 9 (2024)

Section

INNOVATING IN THE REDEFINITION OF THE RELATIONSHIP BETWEEN HUMAN BEINGS AND THEIR ENVIRONMENT

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Copyright (c) 2024 Fernando Oñate-Valdivieso, Arianna Oñate-Paladines

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