This data release is a summarization within the USGS Spatial Hydro-Ecological Decision System (SHEDS) framework of the Oregon State University PRISM Climate Group 30-year normal 800 meter resolution monthly, minimum and maximum temperature data and monthly precipitation data between 1991 and 2020. The output is a table consisting of the summarized values of these continuous variables for each local SHEDS catchment within the SHEDS Hydro-Region 2 along with a table of these variables individually processed through an upstream accumulation method for each catchment in SHEDS Region 2. This upstream accumulation method takes the local and upstream catchment values for a particular catchment, individually weighs them by the ratio of their respective catchment area to the total local and upstream catchment area, then sums all weighted values.
The output table for the local catchment summarizations contain the mean of each variable within each SHEDS catchment. The output upstream accumulated table contains the respective local catchment summarizations processed through the upstream accumulated method detailed above. Both tables contain the unique identifier (FeatureID) of the SHEDS catchments acting as the zone of summarization, and the summarized variables for the catchments. To note, the FeatureID field can be used to join the data summaries to the geospatial SHEDS catchments. Additionally, the percent of each catchment that contained data for each variable being summarized and the area of that SHEDS catchment in square kilometers was included for the local catchment summarization table. These were not included for the upstream accumulation summarization table as these values were not calculated within the SHEDS framework.
