L---+---T1----+-T--2----T----3--T-+----4T---+---T5----+-T--6----T----R7--T-+--r Monthly Discharges for 2400 Rivers and Streams of the former Soviet Union [FSU] -- v1.1 B.A. Bodo September, 2001 Abstract This data set has monthly discharge data for 2458 gauges in the former Soviet Union [FSU] --- 316 gauge records from NCAR ds553.1; 2,134 gauge records from data sets released by Russia's State Hydrological Institute [SHI]; and 8 records from the global Dettinger and Diaz GHCDN compilation. The SHI data sets include 1,486 gauge records for the FSU Arctic drainage basin via R-Arcticnet [see www.R- Arcticnet.sr.unh.edu], and 1,206 gauge records for mostly non-Arctic FSU drainage basins partly available at espejo.unesco.org.uy/index.html. Geographic coverage of the joint set spans the entire FSU and all major river and oceanographic basins. Records are generally long: mean length is 36.3 yrs and 1,724 (70%) gauges have 25 or more years of data. 1,373 gauges have data to 1985 and another 909 gauges also have some data from 1986-1995. 640 gauges represent watersheds of 10,000 or more sq km, and 1,055 gauges represent catchments of 1,000-9,999 sq km. Data and metadata quality of the 2,134 gauge records from SHI have not been scrutinized as rigorously as data taken from ds553.1. Redundancies (replicated sites and individual years of record) have been mostly resolved. Egregious numerical errata have been deleted. River and gauge names for most gauges have been resolved to conventional English forms or close approximations. Numerous errata in location coordinates and drainage areas have been corrected. Overall discharge data and metadata quality are good, but less obvious errata remain; hence, a modicum of caution is advised when using these data for sensitive analyses. Update V1.1 September 2001 -adds 8 records from GHCDN -updates 2 others with some previously missing months -some minor metadata fixes. These data are available for free and un-restricted use.