Rivermouth closes causing Clive River flooding 2 Mar, 2021 03:26 AM 2 minutes to read The Clive River flooded at Evers-Swindell Reserve after the rivermouth closed. Photo / Warren Buckland A low flow led to an overflow for the Clive River on Monday, with the Evers-Swindell Reserve being flooded after king tides and low river levels combined to close the rivermouth. The Hawke's Bay Regional Council engineering officer schemes, Luke Davis, said in summer low river flows can combine with large easterly swells and cause rivermouths to close, as the confluence of the Ngaruroro, Tūtaekurī and Clive rivers did on the weekend. "This can cause flooding upstream, like what we saw at Clive's Evers-Swindell Reserve," Davis said.