NTRS - NASA Technical Reports Server

Back to Results
Cherokee Water Resources Project Summary - Mapping Forest Composition and Health in the Southern Appalachians Using NASA Earth Observations to Enhance Drought and Watershed Health-Related Forest Management for the Eastern Band of the Cherokee IndiansThe Eastern Band of Cherokee Indians (EBCI) owns and manages more than 55,000 acres of land in the Southern Appalachian Mountains of western North Carolina. Most of these lands reside within the Oconaluftee River watershed. In this region and watershed, hemlock trees are a culturally significant foundation species that contribute to habitat biodiversity, regulate temperature and evapotranspiration of riparian environments, and provide economic value for tourism and recreation. The hemlock woolly adelgid (HWA), an invasive insect, has caused widespread hemlock mortality in recent decades, raising concerns about hemlock decline. Hemlock mortality leads to standing dead trees and increased evapotranspiration which can abet the spread of wildfires, especially during periods of drought. The DEVELOP team used satellite imagery from Landsat 5 Thematic Mapper (TM) to quantify and map possible hemlock decline by comparing changes in the normalized difference vegetation index (NDVI) values of winter season between 2003 and 2010. The project utilized the Shuttle Radar Topography Mission (SRTM) along with imagery from Landsat 8 Operational Land Imager (OLI) to create a weighted suitability analysis that maps topographic and environmental conditions favorable for hemlock habitat. This study found that 67%of evergreen and mixed forest cover in the Oconaluftee River valley exhibited a decrease in winter NDVI from 2003 to 2010. Additionally, the two-example weighted suitability analyses showed 4.5-9.5% of hemlock suitable land in 2018 in the Oconaluftee. The partners of this project can use the outputs to identify the extent of potential hemlock decline in the Oconaluftee and establish benchmark metrics for assessing changes in hemlock suitable areas over time.
Document ID
Acquisition Source
Langley Research Center
Document Type
Other - DEVELOP Summer 2020 Project Summary
Chloe Schneider
(Science Systems and Applications (United States) Lanham, Maryland, United States)
Travis Newton
(Science Systems and Applications (United States) Lanham, Maryland, United States)
Wilson Goode
(Science Systems and Applications (United States) Lanham, Maryland, United States)
Richard Murray
(Science Systems and Applications (United States) Lanham, Maryland, United States)
Date Acquired
September 2, 2020
Publication Date
September 14, 2020
Subject Category
Earth Resources And Remote Sensing
Funding Number(s)
WBS: 970315.
Distribution Limits
Public Use Permitted.
Technical Review
Professional Review
DEVELOP Project Summary
No Preview Available