Attributions for nonstationary peak streamflow records across the conterminous United States, 1941-2015 and 1966-2015

The U.S. Geological Survey Dakota Water Science Center, in cooperation with the Federal Highway Administration, analyzed annual peak-flow data to determine if trends are present and provide attribution of trends where possible. Work for the national trend attributions for nonstationary annual peak-flow records was broken into seven regions that are loosely based off of two-digit hydrologic unit watershed boundaries. Each of the regions made attributions for nonstationary annual peak-flow records using both monotonic trends and change point for 50 (1966-2015) and 75 (1941-2015) year trends. Each child page contains four supporting comma separated values (csv) files (50-year monotonic, 75-year monotonic, 50-year change point, and 75-change point), and some regions contain additional supporting items for the assigned primary and secondary attribution at each site. These datasets are supporting materials to accompany the following report: Ryberg, K.R., ed., 2022, Attribution of monotonic trends and change points in peak streamflow across the contermi­nous United States using a multiple working hypotheses framework, 1941–2015 and 1966–2015: U.S. Geological Survey Professional Paper 1869, 8 chapters (A–H), variously paged, https://doi.org/10.3133/pp1869.