In leppott/BCGcalc: Biological Condition Gradient, calculator

knitr::opts_chunk$set(echo = FALSE
                      , results = 'asis'
                      , warning = FALSE
                      , message = FALSE)

EPA StreamCat

https://www.epa.gov/national-aquatic-resource-surveys/streamcat-dataset

The USEPA StreamCat dataset (Hill et al. 2016) is an extensive database with hundreds of natural and anthropogenic landscape metrics for the conterminous US. Two of the metrics - the Indices of Watershed and Catchment Integrity (IWI & ICI , respectively) (Thornbrugh et al. 2018, Johnson et al. 2019) – provide overall measures of watershed condition and are now commonly used as measures of general anthropogenic disturbance in BCG projects. They are comprised of six components: hydrologic regulation, regulation of water chemistry, sediment regulation, hydrologic connectivity, temperature regulation, and habitat provision. The IWI is based on total watershed scale (which includes the local catchment plus the accumulated area of all upstream catchments) and the ICI is based on local catchment scale (which is defined as the landscape area draining to a single stream segment, excluding upstream contributions) (Figure 1).

Literature cited:

Hill, R.A., Weber, M.H., Leibowitz, S.G., Olsen, A.R., & Thornbrugh, D.J. 2016. The Stream-Catchment (StreamCat) dataset: a database of watershed metrics for the conterminous United States. Journal of the American Water Resources Association, 52, 120-128.

Johnson, Zachary & G. Leibowitz, Scott & Hill, Ryan. 2018. Revising the index of watershed integrity national maps. Science of The Total Environment. 10.1016/j.scitotenv.2018.10.112.

Thornbrugh, D. J., Leibowitz, S.G., Hill, R. A., Weber, M. H., Johnson, Z.C. Olsen, A. R., Flotemersch, J. E., Stoddard, J. L., & Peck, D. V. 2018. Mapping watershed integrity for the conterminous United States. Ecological Indicators, 85, 1133-1148.

NHDPlusV2 geospatial layer

https://www.epa.gov/waterdata/get-nhdplus-national-hydrography-dataset-plus-data

Biological sampling sites are joined with the EPA StreamCat dataset via the NHDPlusV2 geospatial layer, which includes stream and catchment layers with unique identifiers (COMID for stream segments and FEATURE ID for local catchments).

NorWeST modeled stream temperature

https://www.fs.usda.gov/rm/boise/AWAE/projects/NorWeST/ModeledStreamTemperatureScenarioMaps.shtml

The development of the NorWeST modeled stream temperature database has vastly increased the amount of high-resolution modeled stream temperature data available in the western US (Figure 3). Various thermal metrics (such as mean August temperature and Maximum Weekly Maximum Temperature (MWMT) are available for various historic and future time periods (e.g., 1993-2011 mean, annual, 2040s, 2080s). 1-km stream segment shapefiles can be downloaded from the website and spatially joined with biological sampling sites.

knitr::include_graphics("images/Resources_Fig3_NorWeST_ProcessingUnits2021.jpg")

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Last updated 2022-10-13

leppott/BCGcalc documentation built on May 17, 2024, 5:55 p.m.