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Evaluating the impacts of rice-based protection dykes on floodwater dynamics in the vietnamese mekong delta using geographical impact factor (Gif)

Vu, Hoang T. D. 1; Trinh, Van Cong; Tran, Dung Duc; Oberle, Peter 1; Hinz, Stefan 1; Nestmann, Franz 1
1 Karlsruher Institut für Technologie (KIT)

Abstract:

This study aims at evaluating the geographical influences of rice-based protection dykes on floodwater regimes along the main rivers, namely the Mekong and the Bassac, in the Vietnamese Mekong Delta (VMD). Specifically, numerous low dykes and high dykes have been constructed particularly in the upper delta’s floodplains to protect the double and triple rice cropping against the annual flooding. For the whole deltaic domain, a 1D-quasi-2D hydrodynamic model setup was used to simulate seventy-two (72) scenarios of dyke construction development in the context of low, medium, and high floods that occurred in the VMD to examine the effects of different flood magnitudes on a certain dyke construction area. Based on the model simulation results, we established an evaluation indicator, the so-called Geographical Impact Factor (GIF), to evaluate the impacts of zone-based dyke compartments on the floodwater regimes along the main rivers for different kinds of floods. Our findings revealed different rates of influences on the floodwater levels along the Mekong and Bassac Rivers under different scenarios of zone-based high-dyke developments. GIF is a useful index for scientists and decision-makers in land use planning, especially in rice intensification, in conjunction with flood management for the VMD and for similar deltas worldwide.


Verlagsausgabe §
DOI: 10.5445/IR/1000133186
Veröffentlicht am 27.05.2021
Originalveröffentlichung
DOI: 10.3390/w13091144
Scopus
Zitationen: 4
Web of Science
Zitationen: 4
Dimensions
Zitationen: 6
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Wasser und Gewässerentwicklung (IWG)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2073-4441
KITopen-ID: 1000133186
Erschienen in Water (Switzerland)
Verlag MDPI
Band 13
Heft 9
Seiten Art.-Nr.: 1144
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagwörter Mekong Delta; rice; dyke system; hydrodynamic model; geographical impact factor
Nachgewiesen in Web of Science
Dimensions
Scopus
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