National Water Information System (NWIS) and National Ground Water Monitoring Network (NGWMN) Water Level Percentiles Drought Summaries for Various Time Periods

This folder contains summaries of droughts based on percentiles estimates of groundwater levels from NWIS and NGWMN for various time periods. It also contains various associated files that were used in assembling and producing this dataset. Additional information regarding NWIS groundwater data can be found here: USGS Groundwater Data for the Nation. More information regarding the NGWMN can be found here: National Ground-Water Monitoring Network (usgs.gov) -------------------------------------- Explanation of file names: The first several pieces are the type of data use to create the file "groundwater_percentiles" After this is the time period of analysis, e.g. "1970-2020" Next is the percentile calculation method, in this case only [...]