CITYMIRROR

BY DATACORRIDOR

Proven domain · 02

Water, coast & flood

Data maturity · Excellent (England), good (GB)

Water resources, wastewater, the coast and flood risk were four separate views here, and separating them was the mistake. A storm overflow means little until you see the river it discharges into and the bathing water downstream; a shoreline policy of no active intervention means little until you see the flood areas behind it. These are one system — catchment to coast — and every question worth asking crosses at least two of them.

Questions a council can answer here

What is in the layer

River and canal network with recorded flow direction, gauging stations, monitored storm overflows, shoreline management policy by frontage, ports, and flood warning areas.

Who it is for

Lead local flood authorities, planning, environmental health and emergency planning teams.

Also: Water companies, coastal and lead local flood authorities, developers, insurers, port operators, environmental regulators.

Status. Each domain carries its own data, independent of the city assessments. Where a source is wired the map is live; otherwise the layers are specified and the ingest is still to build.

Catchment to coast

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Water, coast & flood UK

The rivers of Great Britain with measured flow, every monitored storm overflow, the shoreline policy that decides which coast gets defended, and the flood areas behind it.

9,797 rivers · 1,327 gauges with measured flow · latest 2026-10-2616,221 monitored outfalls · 515 discharging now · 4330 in 7 days8,822 shoreline frontages & ports · 4,208 flood areasIn view: Gauging stations, Storm overflows — 9,316 features

Questions a council can answer here

Water resources, wastewater, the coast and flood risk were four separate views here, and separating them was the mistake. A storm overflow means little until you see the river it discharges into and the bathing water downstream; a shoreline policy of no active intervention means little until you see the flood areas behind it. These are one system — catchment to coast — and every question worth asking crosses at least two of them.

What is in the layer

River and canal network with recorded flow direction, gauging stations, monitored storm overflows, shoreline management policy by frontage, ports, and flood warning areas.

Who it is for

Lead local flood authorities, planning, environmental health and emergency planning teams.

Also: Water companies, coastal and lead local flood authorities, developers, insurers, port operators, environmental regulators.

Core value

Abstraction, spill liability, adaptation exposure

Data maturity

Excellent (England), good (GB)

Flow & levels

Wastewater & risk

Coast & designated waters

Boundaries & context

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