We have been informed that NRW have formally instructed Welsh Water to begin their preparations for water releases from dams on the rivers Tywi and Eastern Cleddau, which start on the 2nd of September and will last for several days. This is to mitigate for the extremely low flow conditions we are currently experiencing, including to allow salmon and sewin to migrate to the top of the catchments to spawn. Both of these releases will result in elevated flows and therefore extra care should be taken when crossing the river or wading/swimming in deeper pools. Please find further information on the two releases below:

River Tywi
• NRW have formally instructed Welsh Water to begin their preparations for a ‘release’ which starts on the 2nd of September and then runs for a 5-day period, after which flows will gradually ramp back down.
• We have experienced a period of very low rainfall in West Wales since the spring that has resulted in exceptionally low flows in the river Tywi. NRW has declared an environmental drought in the area.
• At this time of year adult salmon and sewin that have migrated into the river/estuary from the sea may be effectively trapped, congregating in pools and at risk of becoming exposed to high river temperatures and pollution incidents which may be exacerbated by the low river flow.
• When we experience these conditions at this time of year (Sept-Nov) we have the option to utilise the ‘fisheries water bank’ which is a volume of water reserved within Llyn Brianne Reservoir specifically for the benefit of fish populations within the river and wider ecology.
• This provision allows for the needs of public water supply and the wider environment to be met
• At our request DCWW will release this bank of water in a controlled manner, increasing river flows for a given period. This will allow migratory fish to continue their passage towards spawning areas in the upper river. The release will also freshen the river and improve water quality generally for the benefit of the wider riverine ecology.
• We notify local anglers and other stakeholders to make them aware of the increase in flows and advise them to take extra care when crossing the river or wading/swimming in deeper pools.

Eastern Cleddau
• NRW have formally instructed Welsh Water to begin their preparations for a ‘release’ which starts on the 2nd of September. Flows will gradually ramp up to a maximum, which will continue over the weekend and then ramp back down during the early part of the following week.
• We have experienced a period of very low rainfall in West Wales since the spring that has resulted in exceptionally low flows in the Eastern Cleddau. NRW has declared an environmental drought in the area.
• At this time of year adult salmon and sewin that have migrated into the river/estuary from the sea may be effectively trapped, congregating in pools and at risk of becoming exposed to high river temperatures and pollution incidents which may be exacerbated by the low river flow.
• When we experience these conditions at this time of year (Sept-Nov) we have the option to utilise the ‘fisheries water bank’ which is a volume of water reserved within Llys-y-fran Reservoir specifically for the benefit of fish populations within the river and wider ecology.
• This provision allows for the needs of public water supply and the wider environment to be met
• At our request DCWW will release this bank of water in a controlled manner, increasing river flows for a given period. This will allow migratory fish to continue their passage towards spawning areas in the upper river. The release will also freshen the river and improve water quality generally for the benefit of the wider riverine ecology.