权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Study on Coastal Environmental Simulation and Measurements in Yura Bay

由良湾沿岸环境模拟与测量研究

基本信息

批准号：
11450390
负责人：
OKUNO Taketoshi
金额：
$ 5.31万
依托单位：
Osaka Prefecture University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450390/
关键词：
Osaka Bay Enclosed Sea Area Environmental measurement Principle Component Analysis Multiple Regression Analysis Ecosystem Model Numerical Simulation 海域環境流况由良湾

项目摘要

Water quality and natural environments of the enclosed sea such as Osaka Bay in Japan, has been chronically worse by the high pollution load owing to human activities in the city. It is important for the environments to develop a management system. In order to understand the environments deeply and to propose the suitable managing system, measurements in detail and numerical simulation should be made.In this research, the monitoring, simulation and data mining method of marine environments are investigated in Yura area, where is located in the southern part of Awaji Island. Environmental data, which are mainly measured once every month, have been analyzed using the principle component and multiple regression analysis. It has clarified environmental characteristics in Yura area.In order to develop a practical image measurement method in the coastal area, chlorophyll distribution is measured by means of the images of sea water, are taken with digital CCD camera attached two kinds of optical filters. The chlorophyll distribution is measured and conventional cross-correlation method is applied to measure the current. The result is compared with the path line of a buoy and with the velocity vectors calculated by CFD code.Numerical simulation method of water qualities is constructed using the ecosystem model with land water effects. The load from land is calculated using the prediction method of run-off polluted load through river basins. The results of numerical simulation show that the load from town area is verv large, but does not affect so strong to nutritive salts and phytoplankton in the coastal areas.

日本大阪湾等封闭海域的水质和自然环境因城市人类活动造成的高污染负荷而长期恶化。对于环境来说，开发一个管理系统是很重要的。为了更深入地了解海洋环境，并提出合适的管理体系，需要进行详细的测量和数值模拟。本研究以位于Awaji岛南部的Yura地区为例，对海洋环境的监测、模拟和数据挖掘方法进行了研究。对主要每月测量一次的环境数据进行了主成分分析和多元回归分析。明确了尤拉地区的环境特征。为了开发一种在沿海地区实用的图像测量方法，利用海水图像测量了叶绿素的分布，并用安装了两种滤光片的数字CCD相机拍摄。测量了叶绿素的分布，并用常规的互相关方法测量了电流。将计算结果与浮标路径线和CFD程序计算的速度矢量进行了比较。利用考虑陆水影响的生态系统模型建立了水质数值模拟方法。采用流域径流污染负荷预测方法计算陆源负荷。数值模拟结果表明，来自城镇的负荷很大，但对沿海地区的营养盐和浮游植物的影响不大。