These proceedings include 4 volumes. More than 500 papers have been received from 52 countries and regions. After reviewing, 390 papers are accepted and printed in these Proceedings, bound in four volumes as follows: (1) Large-scaled hydraulic projects and their impacts; (2) River sedimentation; (3) Estuarine and coastal engineering; (4) Environmental problems in sedimentation; (5) Soil and water; and (6) Sediment information.