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  5. Colorado River Delta Project: A compilation of vegetation indices, phenology assessment metrics, estimates of evapotranspiration and change maps for seven reaches of the delta's 150 km region, for nearly the last two decades
  6. Colorado River Delta Project: Growing Season Normalized Difference Vegetation Index (NDVI) Difference Maps

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

Data for journal manuscript: Ecohydrological responses to surface flow across borders—Two decades of changes in vegetation greenness and water use in the riparian corridor of the Colorado River Delta

Dates

Publication Date
Start Date
2003
End Date
2019

Citation

Nagler, P.L., Barreto-Muñoz, A., Jarchow, C.J., and Didan, K., 2020, Colorado River Delta Project: A compilation of vegetation indices, phenology assessment metrics, estimates of evapotranspiration and change maps for seven reaches of the delta's 150 km region, for nearly the last two decades: U.S. Geological Survey data release, https://doi.org/10.5066/P98PGDJ1.

Summary

These operational land imager (OLI) value added data sets, maps, and associated ancillary data were compiled as part of an ongoing research aimed at quantifying the riparian vegetation greenness and water use in the lower Colorado River Delta in Mexico. In order to create trend and anomaly maps that characterize these ecosystems Vegetation Index (NDVI) time series imagery from Landsat OLI were acquired and processed over time and space along seven predefined reaches that capture different natural states and management conditions. We used Landsat OLI 30m data as an improvement upon past studies that were based on coarser remote sensing data from the NASA MODIS sensor (250 m). The OLI 30m images provide better characterization and performance [...]

Contacts

Point of Contact :
Pamela L Nagler, U.S. Geological Survey
Originator :
Pamela L Nagler, Armando Barreto-Muñoz, Chritopher J Jarchow, Kamel Didan
Metadata Contact :
Pamela L Nagler, U.S. Geological Survey
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

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GrowingSeasonNDVI_Metadata.xml
Original FGDC Metadata
View 		25.95 KB application/fgdc+xml
GrowingSeasonNDVI.zip
“Data, maps & metadata” 		11.19 MB application/zip
Figure 8 - NDVI 2003-2019.jpg
“Figure 8. Colorado River delta change map for all years 2003-2019” 		thumbnail 49.67 KB image/jpeg

Purpose

These datasets were created to continue monitoring riparian zone trends and changes in the Lower Colorado Delta as part of the Minute 139 of the 1944 Water Treaty between the United States and Mexico. These datasets, while specific to the research questions addressed by this research (see Larger Work Citation), were designed to be accessible and used by others involved in research efforts on the lower Colorado River Delta. These maps capture a critical period of the Lower Colorado River riparian zone; in particular, as a pre- and post- pulse flow water release and provide a first synoptic view of how the vegetation responded and will continue to respond, and thus are very useful for follow up studies that may compare trends spatially to restoration areas, or temporally, either by comparing to prior years or more likely, by extending the performance period beyond the year 2019.

Rights

The author(s) of these data request that data users contact them regarding intended use and to assist with understanding limitations and interpretation. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.
Figure 8. Colorado River delta change map for all years 2003-2019
Figure 8. Colorado River delta change map for all years 2003-2019

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  • USGS Southwest Biological Science Center (SBSC)

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