| A series of physical model experiments were conducted to study the formation and evolution of sandbar profiles. Considerable emphasis is put on those subtleties in the characteristics of sandbar beach suspended sediment transport rates caused by waves with different modulation coefficients. The suspended sediment concentration, horizontal velocity and the suspended sediment transport rates are measured. The distribution of sand seize along equilibrium profile was given. Two initial beach slopes (1:20and1:10) and different waves were adopted. The results showed that the sandbar can move onshore or offshore, depending on wave condition (for regular wave cases) or on initial beach slope (for irregular wave cases). But it has a final steady position. The suspended sediment transport rates are offshore. The value of suspended sediment concentration depends on the position to the sandbar, water depth and modulation coefficient. |
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