Author: D. Samuel Rajasekhar
Initially, remote sensing methodologies, along with other geo-spatial techniques, were employed for monitoring restoration progress in the Indian River Lagoon (IRL) watershed by the Saint Johns River Water Management District (SJRWMD). These methods were also used in identifying critical habitats in the Guana-Tolomato-Matanzas National Estuarine Research Reserve (GTMNERR). Using no-cost, publicly available digital airborne Color Infrared (CIR) imagery, progress was measured for the restored wetlands in Mosquito River Lagoon of the IRL system. Normalized Difference Vegetation Index (NDVI) was the technique employed. Next, an experiment was conducted to map and isolate the Northern most extent of mangroves (dominated by black mangrove – Avicennia germinans) among the emergent intertidal vegetation within the GTMNERR. DigitalGlobe’s WorldView-2 (WV-2) imagery was used along with ground-truthed and LiDAR data. In conclusion, this study demonstrated that high resolution multiband (~8-bands) satellite imagery collected at phenologically correct time at low-tide has the potential to quantify the spatial dynamics of this habitat to study the effects of long-term climate change over a period of time.
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