Title | Evaluating Change in Rangeland Condition using Multitemporal AVHRR Data and Geographic Information System Analysis |
Publication Type | Journal Article |
Year of Publication | 1999 |
Authors | Minor T., Lancaster J., Wade T., Wickham JD, Wickham JD |
Journal | Environmental Monitoring and Assessment |
Volume | 59 |
Issue | 2 |
Pagination | 211–223 |
Date Published | November 1999 |
Keywords | analysis, GIS, multitemporal, NDVI, Rangeland condition, remote sensing |
Abstract | Coarse-scale, multitemporal satellite image data were evaluated as a tool for detecting variation in vegetation productivity, as a potential indicator of change in rangeland condition in the western U.S. The conterminous U.S. Advanced Very High Resolution Radiometer (AVHRR) biweekly composite data set was employed using the six-year time series 1989–1994. Normalized Difference Vegetation Index (NDVI) image bands for the state of New Mexico were imported into a Geographic Information System (GIS) for analysis with other spatial data sets. Averaged NDVI was calculated for each year, and a series of regression analyses were performed using one year as the baseline. Residuals from the regression line indicated 14 significant areas of NDVI change: two with lower NDVI, and 11 with higher NDVI. Rangeland management changes, cross-country military training activities, and increases in irrigated cropland were among the identified causes of change. |
URL | files/bibliography/99-EnvironlMonitoring&Assessment-Whtiford.pdf |
DOI | 10.1023/A:1006126622200 |