Development of a mesh-based distributed runoff model incorporated with tank models of several land utilizations in a Southeast Asian watershed

Asari Takada, Kazuaki Hiramatsu, Trieu Anh Ngoc, Harada Masayoshi, Toshinori Tabata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We propose a new long-term rainfall-runoff model for a Southeast Asian watershed. To reflect the impact of land use changes associated with rural development, and the nonuniformity of rainfall in tropical regions, a mesh-based distributed runoff model was constructed. Four tank models (paddy, upland field, urban, and forest) were incorporated into each mesh element, to capture the outflow from different land uses. Each mesh element was connected to the river network to reproduce the rainfall-runoff flow processes. By incorporating a watershed groundwater tank, we improved the representation of the baseflow component which is important in long-term runoff analysis. To shorten the calculation time and improve the application to other watersheds, we introduced an inflow/outflow matrix that defines the direction of rainwater flow between adjacent mesh elements. The model was applied to the Dau Tieng watershed in Southern Vietnam, with an area of 2,700 km2. The model was run for the period 1999-2009, and the calculated discharge was compared with the observed values, and a good model fit was achieved. As the model represents the flow processes from rainfall to river discharge with highly versatile tank models, it can be applied to watersheds where hydrological data for model verification are scarce, which is a common issue for many developing countries in Southeast Asia.

Original languageEnglish
Title of host publicationProceedings - International Association for Hydro-Environment Engineering and Research (IAHR)-Asia Pacific Division (APD) Congress
Subtitle of host publicationMulti-Perspective Water for Sustainable Development, IAHR-APD 2018
Editors Benazir, Djoko Legono, Ani Hairani, Karlina, Muhammad Ramdhan Olii, Hendy Setiawan, Roby Hambali, Johan Syafri Mahathir Ahmad, Warniyati Warniyati
PublisherDepartment of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada
Pages539-547
Number of pages9
ISBN (Electronic)9786027176270
Publication statusPublished - Sep 1 2018
Event21st Congress of International Association for Hydro-Environment Engineering and Research-Asia Pacific Division: Multi-Perspective Water for Sustainable Development, IAHR-APD 2018 - Yogyakarta, Indonesia
Duration: Sep 2 2018Sep 5 2018

Publication series

NameProceedings - International Association for Hydro-Environment Engineering and Research (IAHR)-Asia Pacific Division (APD) Congress: Multi-Perspective Water for Sustainable Development, IAHR-APD 2018
Volume1

Conference

Conference21st Congress of International Association for Hydro-Environment Engineering and Research-Asia Pacific Division: Multi-Perspective Water for Sustainable Development, IAHR-APD 2018
CountryIndonesia
CityYogyakarta
Period9/2/189/5/18

All Science Journal Classification (ASJC) codes

  • Ecology
  • Environmental Engineering

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  • Cite this

    Takada, A., Hiramatsu, K., Ngoc, T. A., Masayoshi, H., & Tabata, T. (2018). Development of a mesh-based distributed runoff model incorporated with tank models of several land utilizations in a Southeast Asian watershed. In Benazir, D. Legono, A. Hairani, Karlina, M. R. Olii, H. Setiawan, R. Hambali, J. S. M. Ahmad, & W. Warniyati (Eds.), Proceedings - International Association for Hydro-Environment Engineering and Research (IAHR)-Asia Pacific Division (APD) Congress: Multi-Perspective Water for Sustainable Development, IAHR-APD 2018 (pp. 539-547). (Proceedings - International Association for Hydro-Environment Engineering and Research (IAHR)-Asia Pacific Division (APD) Congress: Multi-Perspective Water for Sustainable Development, IAHR-APD 2018; Vol. 1). Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada.