Annual summaries of daily observations from the USGS Streamflow Gauging Station on the Altamaha River near Doctortown, Georgia, for 1932 to 2004

Daily averaged river discharge data were obtained from the United States Geological Survey for streamflow gauging station USGS 02226000 on the Altamaha River near Doctortown, Georgia. Processed tabular data were downloaded from the USGS real-time web server (http://waterdata.usgs.gov/nwis/) by the Georgia Coastal Ecosystems LTER project, documented, and standardized to metric units. Missing values of mean discharge were estimated by cubic spline interpolation to fill in data gaps of five or fewer consecutive days. Annual summary statistics were then calculated from daily values aggregated by year.

本研究所需的日平均河流流量数据源自美国地质调查局（United States Geological Survey, USGS），采集点位为佐治亚州多克敦附近奥塔莫哈河上的USGS 02226000号流量监测站。经处理的表格格式数据由佐治亚海岸生态系统长期生态研究（Long Term Ecological Research, LTER）项目从USGS实时网络服务器（http://waterdata.usgs.gov/nwis/）下载，随后对数据完成归档记录，并统一转换为公制单位。针对平均流量的缺失值，采用三次样条插值法进行估算，以填补连续时长不超过5天的数据空缺。最后，基于按年份聚合的日度流量数据，计算得到各年度的汇总统计量。