Table 3. Unified flow recommendation’s low flows for each month, for dry, normal, and wet years. Flow rates are cubic meters per second (m3/s).

Year Type
Month Dry Normal Wet Example flow-ecology links
January 40–50 50–65 65–80 Jan. wet-year range considered “optimal” for transportation
Beaches used by reptiles for nesting
February 30–35 35–50 55–65 Beaches used by reptiles for nesting
March 30 30–40 40–45 Flows below 30 m3/s make transportation very difficult
Cichlid fish spawning
April 30 30 30 Cichlid fish spawning
May 30 30 30–35 Cichlid fish spawning
June 30–35 35–60 70–90 Cues for spawning migratory species
July 45–55 60–90 125–135 Cues for spawning migratory species
August 45–70 80–115 120–150
September 60–80 80–120 130–145
October 90–100 100–130 130–145
November 60–75 80–115 120–140
December 45–60 65–85 85–120 Upstream migrations of juvenile migratory species may begin