The influence of roughness coefficient on hydrodynamic simulations: A case study at the Co Chien estuary, Mekong delta

• Autorzy: Nguyen Thi Kim Thao , Le Van Tuan

Identyfikatory

DOI

10.29227/IM-2025-01-02-022

• Konferencja: CESD 2024 : Conference on Earth Sciences : November 11th, 2024, Ho Chi Minh City, Vietnam
• Języki publikacji: EN

Abstrakty

EN

Erosion in the Mekong Delta in general and the coastal area of Tra Vinh province in particular is still happening. One of the direct causes of erosion is due to hydrodynamic factors. Numerical modeling is important in studying and analyzing hydrodynamic regimes in coastal and estuarine areas. The reliability of simulation results heavily depends on the accurate determination of input parameters, among which the roughness coefficient is a crucial parameter. In coastal and estuarine areas, determining the value of the roughness coefficient is challenging due to the complex topography and hydrodynamic factors influenced by the combined effects of waves, currents, and tides. This study aims to assess the impact of the roughness coefficient (Manning's M- inverse of Manning's n ) on simulation results using the MIKE 21/3 Coupled Model FM at the Co Chien Estuary - one of the main branches of the Mekong River. The results show that as the Manning number (M) increases, water level range and current speed rise, with M impact diminishing from the river mouth toward the sea. M notably affects spring tides more than neap tides, especially at tidal troughs and peak velocities. A Manning value of 40–50 provides reliable results. This study initially identifies a suitable range of Manning's M values for the study area, contributing to improving the reliability of numerical models.

Słowa kluczowe

EN

numerical modeling; Manning roughness coefficient; Co Chien estuary; Mekong river

PL

modelowanie numeryczne; współczynnik chropowatości Manninga; estuarium Co Chien; rzeka Mekong

• Wydawca: Polskie Towarzystwo Przeróbki Kopalin
• Czasopismo: Inżynieria Mineralna
• Rocznik: 2025
• Tom: Vol. 2, no. 1
• Strony: art. no. 022
• Opis fizyczny: Bibliogr. 26 poz., rys., tab., wykr., zdj.

Twórcy

autor

Nguyen Thi Kim Thao

• Faculty of Physics and Engineering Physics, University of Science, Ho Chi Minh City, Vietnam
• Vietnam National University, Ho Chi Minh City, Vietnam
• Institute of Coastal and Offshore Engineering, Ho Chi Minh City, Vietnam, Vietnam

autor

Le Van Tuan

• Institute of Coastal and Offshore Engineering, Ho Chi Minh City, Vietnam, Vietnam

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki i promocja sportu (2026).