Development in Estuary Engineering

河口工程工作组(EEWG)举行了会议，讨论了以下主要议题：“赤石大桥塔上的水流观测”和“河口水动力三维数值模型竞赛”。“研究项目(科学研究补助金(B)(1))”的报告是根据1997年至1999年会议的讨论情况编写的。通过在1999年10月召开的海岸工程会议上的成果介绍、河口工程论坛的实施等，使工作组的活动广为人知。在此基础上，讨论了东京湾、大阪湾、伊势湾等河口的水环境和生态环境的未来来源。主要研究内容如下：1.氮、磷等营养盐在河口的传质过程。基于“美国港务局”理念的海岸带环境管理的可能性3.改善环境和生态的缓解技术4.河口浮游生物和底栖生物生态系统

Meetings of Estuary Engineering Working Group (EEWG) were held to discuss the following principal subjects; "Current observations from tower of the Akashi Bridge", and "Competition of three-dimensional numerical models for hydrodynamics in estuary". Report for "research project (grant-in-aid for scientific research (B) (1))" was written up based on the discussions of the meetings from 1997 to 1999. The presentation of findings in the conference of Coastal Engineering, JSCE held on October 1999, the implement of forums concerning Estuary Engineering, and so on were conducted so that the activities of EEWG have many researchers known. Further, we discussed how water environment and ecological environment in estuary such as Tokyo Bay, Osaka Bay, and Ise Bay ought to be originated in the future. The contents of the discussion are as follows :1. Mass transport process of nutrients in estuary such as nitrogen and phosphorous2. Possibility of coastal zone environmental management based on the idea of "Port Authority of USA"3. Mitigation technologies for environmental and ecological improvements4. Ecosystem of plankton and benthos in estuary