| River Marden | |
| Subdivision Type1: | Country |
| Subdivision Name1: | United Kingdom |
| Subdivision Type3: | Region |
| Subdivision Name3: | Wiltshire |
| Length: | 7miles |
| Discharge1 Min: | 3.9cuft/s |
| Discharge1 Avg: | 43cuft/s |
| Discharge1 Max: | 1529cuft/s |
| Source1: | Ranscombe Bottom |
| Source1 Location: | Calstone Wellington, near Calne, Wiltshire |
| Source1 Coordinates: | 51.4156°N -2.0133°W |
| Source1 Elevation: | 328feet |
| Mouth: | Bristol Avon |
| Mouth Location: | near Chippenham, Wiltshire |
| Mouth Coordinates: | 51.4656°N -2.0925°W |
| Mouth Elevation: | 151feet |
| Tributaries Left: | Puddington Brook |
| Tributaries Right: | Rivers Brook, Abberd Brook, Fisher's Brook, Cowage Brook |
The River Marden is a small tributary of the River Avon in England. It flows from the hills surrounding Calne and meets the Avon about a mile upstream of Chippenham. The river has a mean flow of 43cuft/s.
The Marden rises just north of the valley of Ranscombe Bottom near Calstone Wellington in Wiltshire.[1] It then flows in a north-west direction through the Blackland area, where it forms a small ornamental lake at Blackland House, and on to Quemerford, where it is joined on the right bank by the Rivers Brook. In Calne, the Abberd Brook joins on the right. The river turns in a westerly direction and is joined by the overspill from Bowood Lake, part of the Bowood House estate, on the left at Studleybrook Farm. The river is then joined by the combined Fisher's and Cowage brooks before turning to the north-west, past the village of Stanley. 1.5miles later it joins the Bristol Avon to the north-east of Chippenham.
The Domesday survey of England in 1086 records four watermills on the Marden at Calne. In the 18th century four fulling mills are recorded and one of these, Upper Mill, became a paper mill in 1768 and continued in operation until 1860. Hassell's Mill at Studley remained in operation until 1960.
A branch of the Wilts & Berks Canal, opened in 1810, paralleled the course of the Marden west of Calne. The canal was closed in 1914 following the collapse into the river of the Stanley aqueduct in 1901. Traces of the canal and its towpath survive.[2] [3]
The Environment Agency gauging station at Stanley has measured the mean flow of the river as 43cuft/s, with a maximum recorded flow of 1529cuft/s on 30 October 2000 and a minimum of 3.9cuft/s on 21 August 1976.[4]