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Shad Thames: north Southwark: 0.8 miles (1.3 km) (about; longer old catchment drains to other surface and combined water conduits) Mainly diverted to surface and combined sewer drains: River Walbrook or Walbrook
The Thames itself provides two-thirds of London's drinking water, while groundwater supplies about 40 per cent of public water supplies in the overall catchment area. Groundwater is an important water source, especially in the drier months, so maintaining its quality and quantity is extremely important.
Watershed delineation is the process of identifying the boundary of a watershed, also referred to as a catchment, drainage basin, or river basin.It is an important step in many areas of environmental science, engineering, and management, for example to study flooding, aquatic habitat, or water pollution.
The Thames Water Ring Main (TWRM, formerly the London Water Ring Main) is a system of approximately 80 km (50 mi) of concrete tunnels which transfer drinking water from water treatment works in the Thames and River Lea catchments for distribution within central London.
Thames Water also removes, treats and disposes of 4.6 billion litres (1,000 million imperial gallons) of wastewater per day from 15.5 million customers (6 million properties) using 5,123 sewage pumping stations through 109,292 km (67,911 mi) of managed sewerage mains to 353 sewage treatment works across an area of 13,000 km 2 (5,000 sq mi) of ...
Note that, in the UK, the terms "river basin" and "catchment" are used officially and far more frequently than the US term "drainage basin". See the lists of rivers of England, Scotland, Wales and Northern Ireland.
The Long Reach sewage treatment works is located in Dartford, Kent adjacent to the River Thames. It treats the sewage from a population of 837,000 in a catchment area of 518 km 2 (200 sq mi) in south and south east London and west Kent. The treatment capacity of the works is 346 million litres per day (Ml/d).
The Hogsmill River in Surrey and Greater London, England, is a small chalk stream tributary of the River Thames. It rises in Ewell and flows into the Thames at Kingston upon Thames on the lowest non-tidal reach, that above Teddington Lock. The river is 10 km (6 mi) long and has a catchment area of about 73 km 2 (28 sq mi). [1]