This file contains estimates of water occurrence and recurrence for US reservoirs.

Reference: Hansen et al. (in review). Temporal Variability in Reservoir Surface Area: an Important Source of Uncertainty in GHG Emission Estimates.

Contact:  hansench@ornl.gov

Dataset: "US_WaterOccurrence_GSW.csv"

Field Descriptions
Hylak_id = identifier used in the HydroLakes dataset (https://doi.org/10.1038/ncomms13603)
AvgRecurrence = percentage of the satellite record where pixels were identified as water using the Global Surface Water dataset (doi:10.1038/nature20584), averaged over the waterbody polygon
AvgSeasonality = average number of months in the year where pixels are identified as water, averaged over the waterbody polygon
maxExtent = maximum pixels in the waterbody polygon identified as water
PercOcc10_MaxExtent = percent of pixels in the maximum extent that are identified with at least 10% occurrence.
PercOcc20_MaxExtent = percent of pixels in the maximum extent that are identified with at least 20% occurrence.
PercOcc30_MaxExtent = percent of pixels in the maximum extent that are identified with at least 30% occurrence.
PercOcc40_MaxExtent = percent of pixels in the maximum extent that are identified with at least 40% occurrence.
PercOcc50_MaxExtent = percent of pixels in the maximum extent that are identified with at least 50% occurrence.
PercOcc60_MaxExtent = percent of pixels in the maximum extent that are identified with at least 60% occurrence.
PercOcc70_MaxExtent = percent of pixels in the maximum extent that are identified with at least 70% occurrence.
PercOcc80_MaxExtent = percent of pixels in the maximum extent that are identified with at least 80% occurrence.
PercOcc90_MaxExtent = percent of pixels in the maximum extent that are identified with at least 90% occurrence.