期刊
JOURNAL OF ENVIRONMENTAL MANAGEMENT
卷 137, 期 -, 页码 163-177出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2013.11.050
关键词
Water quality; River plume; Water types; Risk maps; Ecological impact; Monitoring; Great Barrier Reef
资金
- Centre for Tropical Water and Aquatic Ecosystem Research (TropWATER)
- Great Barrier Reef Marine Park Authority and Department of Sustainability, Environment, Water, Population and Communities (DSEWPaC)
- Australian Research Council
- Consejo Nacional de Ciencia y Tecnologia (CONACyT)
River plumes are the major transport mechanism for nutrients, sediments and other land-based pollutants into the Great Barrier Reef (GBR, Australia) and are a major threat to coastal and marine ecosystems such as coral reefs and seagrass beds. Understanding the spatial extent, frequency of occurrence, loads and ecological impacts of land-based pollutants discharged through river plumes is essential to drive catchment management actions. In this study, a framework to produce river plume risk maps for seagrass and coral ecosystems, using supervised classification of MODIS Level 2 (L2) satellite products, is presented. Based on relevant 12 thresholds, river plumes are classified into Primary, Secondary, and Tertiary water types, which represent distinct water quality (WQ) parameters concentrations and combinations. Annual water type maps are produced over three wet seasons (2010-2013) as a case of study. These maps provide a synoptic basis to assess the likelihood and magnitude of the risk of reduced coastal WQ associated with the river discharge (river plume risk) and in combination with sound knowledge of the regional ecosystems can serve as the basis to assess potential ecological impacts for coastal and marine GBR ecosystems. The methods described herein provide relevant and easily reproducible large-scale information for river plume risk assessment and management. (C) 2014 Elsevier Ltd. All rights reserved.
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