Aylesford Stream is a 5.4 kilometre long tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of the Great Stour

River Stour, Kent

The River Stour is the river in Kent, England that flows into the English Channel at Pegwell Bay. Above Plucks Gutter, where the Little Stour joins it, the river is normally known as the Great Stour. The upper section of the river, above its confluence with the East Stour at Ashford is sometimes...

, joining at Pledge’s Mill

Watermill

A watermill is a structure that uses a water wheel or turbine to drive a mechanical process such as flour, lumber or textile production, or metal shaping .- History :...

 at the bottom of East Hill in Ashford, Kent

Ashford, Kent

Ashford is a town in the borough of Ashford in Kent, England. In 2005 it was voted the fourth best place to live in the United Kingdom. It lies on the Great Stour river, the M20 motorway, and the South Eastern Main Line and High Speed 1 railways. Its agricultural market is one of the most...

, England

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

. The stream

Stream

A stream is a body of water with a current, confined within a bed and stream banks. Depending on its locale or certain characteristics, a stream may be referred to as a branch, brook, beck, burn, creek, "crick", gill , kill, lick, rill, river, syke, bayou, rivulet, streamage, wash, run or...

s source is north of Sevington

Sevington

Sevington is a small village and civil parish to the south-east of Ashford, Kent in England, with a population of about 113 in 1872, currently 354....

 and runs through Willesborough

Willesborough

Willesborough is a residential suburb on the eastern side of Ashford, Kent, England.-The area:The South Willesborough Dykes area, on the west bank of the East Stour river, is an area of sheep fields drained by dykes. The area is designated as the South Willesborough Dykes Site of Nature...

 and then between Newtown and South Willesborough.

The area along the stream forms part of a Local Nature Reserve

Local Nature Reserve

Local nature reserve or LNR is a designation for nature reserves in the United Kingdom. The designation has its origin in the recommendations of the Wild Life Conservation Special Committee which established the framework for nature conservation in the United Kingdom and suggested a national suite...

, the Ashford Green Corridor

Ashford Green Corridor

Ashford Green Corridor is a green space that runs through the town of Ashford in Kent, England. The Green Corridor is made up of parks, recreation grounds and other green spaces alongside the rivers that flow through Ashford....

, with pollarded willows adjacent to Bentley Road in Willesborough. Part of the area is designated as the South Willesborough Dykes, a Site of Nature Conservation Interest

Site of Nature Conservation Interest

Site of Nature Conservation Interest is a designation used in many parts of the United Kingdom to protect areas of importance for wildlife and geology at a county scale...

 (SNCI). The dykes continue on the east side of the East Stour and amongst the residential areas.

When High Speed 1 was built through Ashford, the stream was diverted to run alongside the railway line.