Impact of sand mining on sediment transport and morphological change of Hai Phong coastal area

Nguyen Minh Hai; Do Gia Khanh; Vu Duy Vinh; Tran Dinh Lan

doi:10.15625/1859-3097/19/3B/14517

Author affiliations

Authors

Nguyen Minh Hai Institute of Marine Environment and Resources, VAST, Vietnam
Do Gia Khanh Department of Science and Technology, Hai Phong, Vietnam
Vu Duy Vinh Institute of Marine Environment and Resources, VAST, Vietnam
Tran Dinh Lan Institute of Marine Environment and Resources, VAST, Vietnam

DOI:

https://doi.org/10.15625/1859-3097/19/3B/14517

Keywords:

Sand mining, sediment transport, morphological change, Hai Phong.

Abstract

The paper presents the results of simulating the impact of sand mining on sediment transport and morphological change in Hai Phong coastal area based on Delft3D model. Scenario groups are established: Present scenarios without sand mining and simulated scenarios of the present sand mining (assuming 30% sand compared to plan). The scenario groups are calculated in the dry and rainy seasons for main wind directions (NE, SE, SW) in the case of moderate wind and strong wind. The results show that sand mining reduces sediment flow alongshore (2–81%) and seawards (5–83%). Besides, the increase in depth causes morphological change in this area: Rising the deposition rate (5–10 mm/month) at the sand mining locations; decreasing accretion rate and increasing the erosion rate in the neighboring areas of sand mining location.

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References

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