WATER based on modeling the reflectance spectra of clear water, phytoplankton, inorganic particulate matter and dissolved organic matter, as well as of the water column and atmospheric transmission processes. Amounts of phytoplankton, inorganic particulate matter and dissolved organic matter are the major constituents defining water quality. By using the retrieval
algorithms developed, concentration maps of water quality parameters, listed above, can be derived. WATER TEMPERATURE Accurate satellite-based detection of the surface temperature of large water bodies is a proven technology. Periodic monitoring of the temperature patterns across Canadian lakes can contribute
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to studies on dispersion and transport of pollutants discharged from on-shore sources. Specific algorithms were also developed for mapping frozen lake surfaces as well as for detection of surface temperatures. An interesting application of satellite observations over frozen lakes concerns monitoring the thawing process of surface ice. By analyzing multitemporal thermal imagery, the date when the average surface temperature becomes above or below the melting point (0°C) can be estimated with a better than two days accuracy. UPCOMING PROJECTS New initiatives are planned by A-MAPS Environmental and its partners to develop innovative methodologies for lake vegetation management and remedial actions. In situ measurements, high-resolution spectral satellite observations and digital underwater photography will be employed. Standard water sampling techniques and equipment will be applied. In situ measurements of water clarity, nutrient concentrations and bottom vegetation density will be performed during a joint measuring campaign by volunteers from the Wolfe Lake (Westport) Association and Carleton University. Data on water quality and bottom vegetation density will be statistically analyzed in order to specify factors affecting Eurasian watermilfoil proliferation. The effectiveness of currently applied bottom vegetation reduction methods, bottom mats and laminar flow aeration will be evaluated at localized small areas. Results of the study will be presented through an interactive software application, with a graphical user interface enabling quantitative assessments in terms of graphical and numerical displays and statistical analyses. Findings, conclusions and recommendations resulting from the project will be reported and presented to organizations dealing with aquatic environment care and management. Ultimately, these initiatives aim at the development of innovative methodology, based on EO data, supported by user-friendly software applications that will enable effective control of milfoil Environmental Science & Engineering Magazine