Flow rates of the river Erewash were quantified monthly from May 2006 until August 2013. The mean monthly discharge of the river was calculated from measurements taken at 30-minute intervals using an Ultraflux UF322 CO ultrasonic flowmeter situated a short distance upstream from where the river enters the gravel pit Coneries Pond (52.897, -1.245) at the Attenborough Nature Reserve. The data were collected to study the influence of river discharge and rainfall on the ecology and biogeochemistry of lakes connected to the river Erewash. See all details in Cross et al., 2014 (doi:10.1127/fal/2014/0573).