A common and sensitive problem in South East Asia is river mouth sedimentation.   Many river mouths which are often used as sheltered waters for fishing vessels, have over the past decades suffered decreasing navigation depths, predominantly as a result of increased sediment load due to hinterland deforestation.

Decreasing navigation depths in many instances result in entrance down time and increased safety risk due to shifting shallow sand bars and wave-current interaction.

DHI has carried out an impressive number of detailed river mouth improvement studies using a combination of LITPACK littoral process models, MIKE 21 coastal hydraulic and morphological models and MIKE 11 river models. Physical testing of training structures has also been performed.

Relevant major studies include:

• Kuala Terengganu, Malaysia
• Kuala Muda, Malaysia
• Kuala Kedah Marina, Malaysia
• Marang River mouth, Malaysia
• Kuantan River mouth, Malaysia
• Kuala Belait, Brunei