Simulation Models for Ambient Water Quality Criteria for Dissolved Oxygen

• Activity Number: 254
• Type: Contributed
• Date/Time: Monday, July 30, 2012 : 2:00 PM to 3:50 PM
• Sponsor: Section on Statistics and the Environment
• Author(s): Koji Kanefuji*+ and Ryo Akaishi and Kosei Iwase and Mitsumasa Okada
• Companies: The Institute of Statistical Mathematics and The Institute of Statistical Mathematics and Yokohama College of Pharmacy and The Open University of Japan
• Keywords: spatial

Abstract

A three-dimensional water quality model is developed for simulating temporal and spatial variations of dissolved oxygen in the ambient water. This developed model predicts the spatial distribution of tidal current and dissolved oxygen to evaluate for the water quality criteria in Japan. In order to achieve and maintain the water quality conditions necessary to protect the aquatic living resources of the Chesapeake Bay and its tidal tributaries, the U.S. Environmental Protection Agency Region III has developed the guidance document, entitled Ambient Water Quality Criteria for Dissolved Oxygen, Water Clarity and Chlorophyll a for the Chesapeake Bay and Its Tidal Tributaries (Regional Criteria Guidance). Oxygen is one of the most essential environmental constituents supporting life. In the Bay's deeper waters, there is a natural tendency toward reduced dissolved oxygen conditions because of