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Using Multi-temporal MODIS 250 m Data to Calibrate and Validate a Sediment Transport Model for Environmental Monitoring of Coastal Waters. Richard L. Miller, Carlos E. Del Castillo NASA, Applied Sciences Directorate, SSC Chandrasekhar Chilmakuri, A. Alex McCorquodale, Ioannis Georgiou
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NASA, Applied Sciences Directorate, SSC
Chandrasekhar Chilmakuri, A. Alex McCorquodale, Ioannis Georgiou
FMI Center for Environmental Modeling, University of New Orleans
Brent A. McKee
Department of Earth and Environmental Sciences, Tulane University
Eurico J. D’Sa
Coastal Studies Institute, Louisiana State University
High concentrations of suspended materials directly affect many water column
and benthic processes such as phytoplankton productivity, coral growth,
productivity of submerged aquatic vegetation, nutrient dynamics, and the
transport of pollutants and other materials.
Knowing the concentration, spatial distribution, and dynamics of
suspended sediments in coastal aquatic systems is an important goal of
many research and environmental monitoring programs.
The distribution and flux of suspended sediments is highly variable in coastal
environments and vary over a broad spectrum of time and space scales.
Traditional field measurements can not effectively monitor suspended sediments
at the desired spatial and temporal scales
Use of remote sensing technology to map suspended sediment is well documented.
Problems with clouds, spatial resolution, and revisit time.
Use of numerical models for environmental studies is also widely documented.
No problem with clouds – however, limited observations for boundary and
Potential solution – combine remote sensing and numerical model.
r2 = 0.96
620 – 670 nm
841 – 876 nm
SSC MODIS X-band ground station
The Estuarine Coastal and Ocean Modeling System with Sediment, ECOMSED,
is a derivative model from the Princeton Ocean Model (POM).
Has a comprehensive sediment model that simulates the combined effects of
currents and waves on the resuspension and settling of inorganic particles.
Hydrodynamics and the transport components of the model have been calibrated
and validated for Lake Pontchartrain, the sediment transport module of the
model has not.
The ECOMSED model calibration was significantly improved using multi-
temporal TSM images derived from MODIS 250 m images
The model captured the general spatial distribution as indicated in the MODIS
images; however, the model tended to over-estimate suspended sediment
concentrations in shallow areas.
Future improvements include: field samples to better calibrate MODIS images
(i.e., Aqua), field studies to better define the spatial variation in the sediment
parameters in the numerical model, and modifying the model to accept
spatially varying sediment and wind fields.
Conduct numerical model simulations and processed image data to provide
reliable estimates of storm water discharge and fecal coliform distributions.
Forces acting on the Earth system
Earth system responses
How is the Earth changing and what are the consequences of life on Earth?