Seminar on Environment and Development in Vietnam

Friday and Saturday, December 6-7, 1996

Common Room, University House,
and J G Crawford Building, National Centre for Development Studies,
Australian National University

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Salinity Intrusion in the Red River Delta

by Vu Thanh Ca,
Department of Civil and Environmental Engineering, Saitama University

Abstract

Characteristics of salinity intrusion into estuaries of the Red River System, Vietnam are studied based on many year measurement data of salinity concentration at stations along the estuaries and on a numerical model. Computed results of salinity concentration at measurement stations along rivers and tributaries by the numerical model agree satisfactorily with observed data.

It was found that in the dry season, the salinity intrusion length is as long as 20 km in the main river and more than 20 km for some tributaries. In the main river and tributaries with high freshwater discharge, the maximum salinity concentration is observed in January while for the tributaries with low freshwater discharge, the maximum salinity concentration is observed in March.

Dr. Vu Thanh Ca,
Associate Professor,
Department of Civil and Environmental Engineering,
Saitama University,
Urawa, Saitama 338, Japan.

Tel: 81-48-858-3567
Fax: 81-48-855-9361
Email: vuca@env.civil.saitama-u.ac.jp