Abstract
The Indonesian Government's third five-year development plan (Rencana Pelaksanaan Lima Tahun, or REPELITA) was started in 1979. Many of the projects comprising this plan are supported by the results of recent scientific research and technological improvement. Some of the projects aim to develop riverine and estuarine areas for rice cultivation by making use of climatology, river mechanics, tidal hydraulics, coastal engineering, and other related disciplines. This article deals with development projects for riverine and coastal areas, mainly from the viewpoint of riverine and coastal hydraulics. The projects may be classified into three categories : (1) prevention of estuarine blockage by sedimentation, resulting possibly from the effects of coastal waves and estuarine currents; (2) tidal irrigation and its maintenance; and (3) utilization of swamp and marsh areas. Most of these projects are being promoted with international cooperation.
