Please use this identifier to cite or link to this item:
https://dspace.ctu.edu.vn/jspui/handle/123456789/73289
Title: | Analysis of salinity behavior in Hakata Bay after heavy rainfall using a three-dimensional -coordinate model |
Authors: | Fukuda, Akihiro Tabata, Toshinori Hiramatsu, Kazuaki Harada, Masayoshi |
Keywords: | Coastal sea Freshwater discharge Hydrodynamic and salinity diffusion model Tank model |
Issue Date: | 2021 |
Series/Report no.: | Japan Agricultural Research Quarterly;Vol. 55, No. 02 .- P.137-146 |
Abstract: | Massive freshwater discharges due to heavy rainfall have recently caused negative changes to coastal waters, such as red tides and anoxic water masses. In this research, a salinity analysis was conducted using a three-dimensional σ-coordinate model to evaluate the impact of large freshwater discharges on the horizontal and vertical distribution of salinity. Specifically, Hakata Bay was examined after a heavy rainfall with a six-year return period, beginning 16 September 2002, a common recurrence interval. The data were calculated for 11-27 September 2002. Tank models were applied to calculate river inflow discharges, which were considered river inflow in the hydrodynamic and salinity diffusion model for Hakata Bay. Model validation results showed high reproducibility, and the calculated tidal current and salinity agreed well with observed data. Results also showed that: (1) salinity was less than 15.0 psu at the river mouths about one day after heavy rainfall: (2) low-salinity water (< 28.0 psu) spread across the surface of the inner part of the bay; and (3) salinity differences between the surface and bottom were large (approximately 4 psu) and lasted three days after the heavy rainfall. It was concluded that red tides and anoxic water masses could be induced in the inner part of the bay. |
URI: | https://dspace.ctu.edu.vn/jspui/handle/123456789/73289 |
ISSN: | 0021-3551 |
Appears in Collections: | Japan Agricultural research quarterly |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
_file_ Restricted Access | 2.41 MB | Adobe PDF | ||
Your IP: 3.144.117.52 |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.