Remote sensing derived maps of tamarisk (2009) and beetle impacts (2013) along 412 km of the Colorado River in the Grand Canyon, Arizona
Data for journal manuscript: Remote sensing of tamarisk beetle (Diorhabda carinulata) impacts along 412 km of the Colorado River in the Grand Canyon, Arizona, USA
Dates
- Publication Date
- 2018-04-06
- Time Period
- 2009
- Time Period
- 2013
Citation
Bedford, A., Sankey, T.T., Sankey, J.B., Durning, L.E. and Ralston, B.E., 2018, Remote sensing derived maps of tamarisk (2009) and beetle impacts (2013) along 412 km of the Colorado River in the Grand Canyon, Arizona: U.S. Geological Survey data release, https://doi.org/10.5066/F72B8X71.
Summary
These data are aerial image-derived, classification maps of tamarisk (Tamarisk spp.) in the riparian zone of the Colorado River from Glen Canyon Dam to Separation Canyon, a total river distance of 412 km. The classification maps are published in GIS vector format. Two maps are published: 1) a classification of tamarisk from a 0.2 m resolution multispectral image dataset acquired in May 2009 (Tamarisk Classification 2009), and 2) a classification of tamarisk impacted by the tamarisk beetle (Diorhabda carinulata) from a 0.2 m resolution multispectral image dataset acquired in May 2013 (Beetle Impact Classification 2013). Tamarisk presence in 2009 was classified using the Mahalanobis Distance method with a total of 2,500 training samples, [...]
Summary
Contacts
Attached Files
Purpose
These data are intended to be useful for monitoring, research and management related to riparian vegetation, in general. These datasets were developed specifically to assist in quantifying the area of tamarisk impacted by the tamarisk beetle, a biological control agent that arrived in the state of Arizona in 2009. As such, these data can be used for GIS analyses that examine the spatial distributions of tamarisk and tamarisk beetle impacts throughout the riparian area of the river, and as baseline mapping for monitoring future status and trends of tamarisk and beetle impacts. For example, researchers and resource managers can use these data to identify beetle-impacted tamarisk areas for further study to better understand the response of the plant communities to tamarisk defoliation and possible mortality. These data may also be useful in planning possible restoration efforts by identifying heavily beetle-impacted areas.
Rights
The authors 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.
Map
Communities
- USGS Data Release Products
- USGS Southwest Biological Science Center (SBSC)