A comprehensive study on hydraulic environments to clarify nutrient transport in land-ocean interconnecting zones

水力环境综合研究，以阐明陆地-海洋互连区的养分输送

基本信息

批准号：
10450181
负责人：
NADAOKA Kazuo
金额：
$ 6.85万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450181/
关键词：
nutrient transport ocean current structure filed observations coastal environments land-ocean interconnecting zone terrestrial & ocean influence river plume coral reef 海-陸接合領域

项目摘要

With various field measurements, satellite remote sensing and numerical simulations, in the present study, it has been attempted to clarify the current field and the associated sediment and nutrient transports in coastal areas as land-ocean interconnecting zones, with the influence of terrestrial and ocean water on them. The measurements and analyses have been done for Kashima-nada and Tokyo Bay as typical open and semi-enclosed coastal zones, respectively, and Okinawa coasts as typical coral reef areas. The field measurements have been done by means of, 1) in situ sensor systems with buoy-mounted thermo- and salino-meters and Chlorophyl-a and turbidity meters and bottom-mounted ADCPs and EMCs with pressure-type wave gauges, 2) ship-borne sensors of similar items, and 3) a HF-radar system to detect spatial distribution of sea-surface velocities.In Kashima-nada, it has been succeeded, with the data analysis and the corresponding 3-D numerical simulation of the current field, in clarifyi … More ng the dynamical behavior of the river plume from Naka river on the occasion of the big flood in late August of 1998. The rapid growth of phyto-plankton in a near-shore zone was observed just after the flooding, in which appreciable amount of nutrients may be transported with the river plume. Besides, the dynamic behavior of the coastal water during a typhoon was investigated, with the change of the coastal water quality due to the approach of the Kuroshio water, and the generation of internal tidal waves at the shelf edge and their subsequent deformation and damping on the shelf. In Tokyo Bay, the analysis of the field data obtained both in winter and late summer elucidated highly unsteady characteristics of the approach of the Kuroshio water to the bay mouth and the subsequent exchange with the bay water. Further,. by developing an advanced numerical model for 3-D current computation coupled with a regional atmospheric model, a computation of oil spill dispersion with high accuracy was performed. In Okinawa coral reefs, the current, sediment and thermal environments with influence from river and ocean on them were clarified by field observations. A coastal current field was investigated with field measurements and a numerical simulation to analyze possible long-distance transport of coral eggs. Less

通过各种现场测量，卫星远程灵敏度和数值模拟，在演讲研究中，它已尝试阐明沿海地区的当前场以及相关的沉积物和养分运输，因为土地海洋相互联系区域，并在其上具有地层和海洋水的影响。对于典型的开放式和半封闭的沿海地区，对Kashima-Nada和Tokyo Bay进行了测量和分析，并作为典型的珊瑚礁地区进行了测量和分析。 The field measurements have been done by means of, 1) in situ sensor systems with buoy-mounted thermo- and salino-meters and Chlorophyl-a and turbidity meters and bottom-mounted ADCPs and EMCs with pressure-type wave gauges, 2) ship-borne sensors of similar items, and 3) a HF-radar system to detect spatial distribution of sea-surface velocities.In Kashima-nada, it通过数据分析和当前领域的相应3-D数值模拟，在1998年8月下旬发生的大洪水之际，Naka河的动态行为的成功。此外，研究了台风期间沿海水的动态行为，由于黑杂水的接近，沿海水质的变化以及架子边缘的内部潮汐产生的产生及其随后的变形和在架子上跳舞。在东京湾，对冬季和夏末获得的现场数据的分析阐明了黑果水水到海湾口的方法以及随后与海湾水的交换的高度不稳定的特征。更远，。通过为3-D电流计算和区域大气模型开发高级数值模型，进行了高精度的溢油分散体的计算。在冲绳珊瑚礁中，通过现场观测来阐明河流和海洋影响的当前，沉积物和热环境。研究了沿海电流场，并通过现场测量和数值模拟来分析珊瑚卵的可能长距离运输。较少的