Table of Contents
ISRN Oceanography
Volume 2013, Article ID 652617, 11 pages
Research Article

Regional Analysis on Decadal Variation in Aspects of Water Quality in Three Contrasting Coastal Systems of Ishikawa Coast, Japan

1Operating Unit in Ishikawa/Kanazawa, Institute of Advanced Studies, United Nations University, 2-1-1 Hirosaka, Kanazawa, Ishikawa 920-0962, Japan
2Department of Fisheries, Faculty of Science, Centre for Environment and Science Education (CESE), Lagos State University, PMB 0001 LASU, Ojo, Lagos, Nigeria

Received 26 December 2012; Accepted 15 January 2013

Academic Editors: C. W. Brown and C.-C. Hung

Copyright © 2013 J. I. Agboola and A. E. McDonald. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This study examines drivers and trends of change in time and space in some coastal water quality parameters and management/cultural practices on the Ishikawa coast, Japan, between 1984 and 2009. Generally, chemical oxygen demand (COD) and dissolved oxygen (DO) concentrations varied significantly ( ) across the three coastal compartments (Kanazawa area (KNA), Noto area (NTA), and Nanao area (NNA)), and pH and DO concentrations varied significantly ( ) over the last three decades, suggesting that human perturbation within the last three decades varied along the coast and may be more relative than environmental change impact. Other water quality variables showed different spatial and temporal patterns and implications across the coastal compartments. Although there is a uniform approach to the development of water quality standards in Japan, these results suggest that setting stricter standards may be required by the prefectural government in collaboration with industry, stakeholders groups, and coastal community resource users.