Identification and quantification of aquatic vegetation with hyperspectral remote sensing in western Nevada rivers, USA
- 22 August 2011
- journal article
- research article
- Published by Informa UK Limited in International Journal of Remote Sensing
- Vol. 32 (24), 9093-9117
- https://doi.org/10.1080/01431161.2010.549850
Abstract
This study used a portable spectrometer to assess the feasibility of using airborne hyperspectral imagery to map the dominant types and amounts of aquatic vegetation in the Carson and Truckee Rivers of western Nevada. Spectral reflectance data were acquired for a number of periphyton and macrophyte types, and corresponding vegetation samples were processed in the laboratory to quantify chlorophyll a (chla) and ash-free dry mass. The dominant periphyton and macrophyte communities encountered in the field could be identified with an overall accuracy of greater than 95%. The lowest individual class accuracy was 82% for one community type, primarily green filamentous algae (GF), which was brown in colour and mixed with diatoms and sediments. Separate stepwise regression models were developed for chla and biomass of each type of vegetation. Regression models had r 2s greater than 0.92, except for the aforementioned brown-coloured community of mixed algae that had r 2s of just over 0.5 for both laboratory measurements. This study suggests good prospects for airborne hyperspectral surveys of aquatic vegetation for water quality studies, assuming a sensor with a high signal-to-noise ratio, high spatial resolution and good environmental conditions at the time of image acquisition.Keywords
This publication has 30 references indexed in Scilit:
- Mapping an inland wetland complex using hyperspectral imageryInternational Journal of Remote Sensing, 2008
- Mapping Invasive Aquatic Vegetation in the Sacramento-San Joaquin Delta using Hyperspectral ImageryEnvironmental Monitoring and Assessment, 2006
- Remote estimation of chlorophyll concentration in hyper-eutrophic aquatic systems: Model tuning and accuracy optimizationAquaculture, 2006
- Use of satellite imagery for water quality studies in New York HarborEstuarine, Coastal and Shelf Science, 2004
- Use of in situ and airborne reflectance for scaling-up spectral discrimination of coral reef macroalgae from species to communitiesMarine Ecology Progress Series, 2004
- Capabilities of remote sensors to classify coral, algae, and sand as pure and mixed spectraRemote Sensing of Environment, 2003
- A METHOD USING CHEMICAL OXIDATION TO REMOVE LIGHT ABSORPTION BY PHYTOPLANKTON PIGMENTSJournal of Phycology, 1999
- Comparison of NIR/RED ratio and first derivative of reflectance in estimating algal-chlorophyll concentration: A case study in a turbid reservoirRemote Sensing of Environment, 1997
- The response of volume reflectance to manipulated algal concentrations above bright and dark bottoms at various depths in an experimental poolGeocarto International, 1995
- Stepwise Regression and Stepwise Discriminant Analysis Need Not Apply here: A Guidelines EditorialEducational and Psychological Measurement, 1995