A Study on Water Purification for Ocean Environments and Ocean Space Utilization Systems

为开展“海洋环境水质净化与海洋空间利用系统”的研究，本课题开展了以下研究：1）人工泻湖的功能与利用概况2）人工泻湖与浮式结构物组合的海洋空间利用系统研究3）人工泻湖水质净化的基础研究。1）在人工泻湖的设计中（可渗透的堤岸），（1）破坏水（2）由于波浪而曝气（3）由于沃茨的运动而催化氧化的功能，2）人工泻湖具有很大的效益，解决了海洋空间利用中海洋结构物单一使用的大部分问题。与围垦人工岛相比，人工泻湖与浮式结构物相结合的海洋空间利用系统在建设成本和建设周期方面具有优势。3）现场环境条件的测量结果表明：（1）泻湖内有效波高降低到外部有效波高的10%左右，高波高降低到10%左右，人工泻湖内有效波高降低到10%左右，人工泻湖内有效波高降低到10%左右。斜坡式防波堤的存在消除了波浪的频率成分;（2）泻湖内的波高可以利用模型试验的结果进行估算;（3）SS（4）净化效果受季节影响较大。为了定量评价人工塘的水质净化功能，需要建立人工塘生态系统的数学模型。

In order to study on "Water Purification for Ocean Environments and Ocean Space Utilization Systems", the following research items have been done during the term of this project :1) Survey of the function and utilization of the artificial lagoon2) Study on the combined system with the artificial lagoon and floating structure for ocean space utilization3) Basic study on water purification by an artificial lagoonFrom this study the following results have been obtained :1) In the design of the artificial lagoon (permeable bank), the function of (1) breaking water (2) aeration due to waves (3) catalytic oxidation due to movement of waters, is important.2) An artificial lagoon has a lot of benefit and most of the probems relating to the single use of ocean structure for ocean space utillization will be solved. The combined system with an artificial lagoon and floating structure for ocean space utilization has an advantage in terms of the construction costs and the term of construction when it is compared with that of a reclamation island.3) The results of field measurements of the environmental conditions show that (1) significant wave height in the lagoon decreases to about 10% of that of the outside and the high-frequency components of waves are also eliminated due to the rubble-mound breakwater (2) wave height in the lagoon can be estimated by using the results of model test for bank effect (3) SS (suspended solid) is effectively removed in the lagoon (4) purification effect is strongly depend on the season of the year.4) In order to evaluate the water purification function of artificial lagoon quantitatively, the establishment of the mathematical model using ecosystem of artificial lagoon is necessary.