Colorado River Project: A compilation of vegetation indices, phenology assessment metrics, estimates of evapotranspiration and change maps for five reaches between Hoover and Morelos Dams on the Lower Colorado River, for nearly the last two decades

These raster and tabular data were compiled to develop time series data of the lower Colorado River (LCR) vegetation greenness, water use, and phenology since the year 2000. An objective of our study was to evaluate short and long-term effects of drought and biocontrol on LCR riparian and aquatic ecosystems south of Hoover Dam. These data represent spatially explicit average Enhanced Vegetation Index (EVI2) derived evapotranspiration (ET) difference, and scaled normalized difference vegetation index (NDVI*) difference maps between two decades (2000 to 2010 and 2011 to 2020) and two 5 year periods (2000 to 2005 and 2016 to 2020). The time-series period statistics data provide estimates of the riparian woodland area...

Tags: Arizona, Botany, Colorado River, ET, EVI2, All tags... Ecology, Geography, Hydrology, Information Sciences, Land Use Change, Landsat images, Mexico, NDVI, Remote Sensing, Soil Sciences, USGS Science Data Catalog (SDC), United States, Yuma, aquatic ecosystems, biota, ecosystem health, ecosystem monitoring, enhanced vegetation index, evapotranspiration, imageryBaseMapsEarthCover, lower Colorado River, monitoring, normalized difference vegetation index, remote sensing, riparian, riparian areas, riparian zone, southwestern United States, time series, time series datasets, trends and changes, water use, wetland ecosystems, Fewer tags

Colorado River Delta Project: Growing Season Normalized Difference Vegetation Index (NDVI) Difference Maps

These normalized difference vegetation index (NDVI) raster data were compiled to develop time series data of the lower Colorado River (LCR) riparian corridor vegetation greenness and phenology since the year 2000. An objective of our study was to evaluate short and long-term effects of drought and biocontrol on LCR riparian and aquatic ecosystems south of Hoover Dam. These data represent spatially explicit scaled normalized difference vegetation index (NDVI*) difference maps between two decades (2000 to 2010 and 2011 to 2020) and two 5 year periods (2000 to 2005 and 2016 to 2020). NDVI* is an additional correction to the NDVI to account for the illumination conditions; it is a processing correction step to improve...

Tags: Arizona, Colorado River, Landsat images, Mexico, NDVI, All tags... United States, Yuma, aquatic ecosystems, biota, ecosystem health, ecosystem monitoring, evapotranspiration, imageryBaseMapsEarthCover, lower Colorado River, monitoring, normalized difference vegetation index, remote sensing, riparian, riparian areas, riparian zone, southwestern United States, time series, time series datasets, trends and changes, water use, wetland ecosystems, Fewer tags

Colorado River Delta Project: River reach (3-7) full time-series period statistics computed for Landsat 5, Landsat 7 and Landsat 8 data

These full time-series period statistics data were compiled for monitoring riparian zone trends and changes in the lower Colorado as part of a study to document riparian ecosystem health and its water use. Our study evaluated the short and long-term effects on the river's vegetation of drought and hydrological processes in this dryland region. Because of the landscape changes, we explored remote sensing-based change analysis techniques and data to develop time series data of the Colorado River riparian corridor vegetation greenness, phenology, and water use since the year 2000. We divided the river into five Reaches (R3..R7) to separate between the different land covers, management conditions, and general geospatial...

Tags: Arizona, Colorado River, ET, EVI2, Landsat images, All tags... Mexico, NDVI, United States, Yuma, aquatic ecosystems, biota, ecosystem health, ecosystem monitoring, enhanced vegetation index, evapotranspiration, imageryBaseMapsEarthCover, lower Colorado River, monitoring, normalized difference vegetation index, remote sensing, riparian, riparian areas, riparian zone, southwestern United States, time series, time series datasets, trends and changes, water use, wetland ecosystems, Fewer tags

Colorado River Delta Project: Growing Season Evapotranspiration (ET) & Enhanced Vegetation Index (EVI2) difference maps

These average EVI2 derived evapotranspiration (ET) raster data were compiled to develop time series data of the lower Colorado River (LCR) vegetation greenness and water use since the year 2000. An objective of our study was to evaluate short and long-term effects of drought and biocontrol on LCR riparian and aquatic ecosystems south of Hoover Dam. These data represent spatially explicit average Enhanced Vegetation Index (EVI2) derived evapotranspiration (ET) difference maps between two decades (2000 to 2010 and 2011 to 2020) and two 5 year periods (2000 to 2005 and 2016 to 2020). These data were compiled by the U.S. Geological Survey (USGS) and University of Arizona, to monitor riparian zone trends and changes...

Tags: Arizona, Colorado River, ET, EVI2, Landsat images, All tags... Mexico, United States, Yuma, aquatic ecosystems, biota, ecosystem health, ecosystem monitoring, enhanced vegetation index, evapotranspiration, imageryBaseMapsEarthCover, lower Colorado River, monitoring, remote sensing, riparian, riparian areas, riparian zone, southwestern United States, time series, time series datasets, trends and changes, water use, wetland ecosystems, Fewer tags