Instrument: Langden Outlet

Summary Details

ID LAN_out
Location # 7
Measurement Stage
Catchment Langden
OS Grid ref SD 65932 49334
Elevation 117.4 m
Area 27.7 km2
Data availability 21/05/2008 - 31/01/2010
Location Outlet of the Langden, immediately upstream of the confluence with the Hodder.
Abstractions United Utilities' Bowland water intake system
Related sites Upstream sites, HAR_out, LOS_out and LAN_mid; downstream site, Hodder Place (EA gauge); other sites in Langden subcatchment, LOS_stock and LOS_mid

Data Download

Cross section survey data, stage/discharge data (including manual measurements of stage) and time series of levels (not corrected for atmospheric pressure) may be downloaded here (400kb). (For details on using the data click here.)

Land Use / Management Changes

Land use / management changes have taken place in the Hareden and Losterdale tributaries and in the headwaters. Fences were erected to limit stocking to help maintaining upland habitats on the moors of Losterdale, Upper Langden, and Hareden. Mixed broadleaf trees have been planted in the riparian zones of Swine Clough (Losterdale), Hareden and Upper Langden. Logging of coniferous trees has taken place in patches in the Hareden catchment. There is the possibility that these patches will be replanted with broadleaf species.

  • Hareden
  • Losterdale
  • Upper Langden

Change Work carried out % area affected
Stocking density Feb 2009 85
Tree planting March 2009 < 1
Total 85

Photographs

  • Upstream view

Channel Description

The channel cross-section at the instrument location is provided below. Datum is taken as the top of the diver access tube (red bar). Width is measured from the left-hand side bank when looking downstream, with locations to left of the diver tube taken as negative and those to the right positive.

Details from an MSc student project are available here. (Note, the information above takes precedence over the student report.)

Stage-Discharge Measurements

Date Time Stage (m) Discharge (m3/s)
22/05/2008 08:40 -0.945 0.316
18/06/2008 15:45 -0.87 0.663
11/11/2008 16:20 -0.765 1.730
12/01/2009 16:35 -0.70 3.420
22/01/2009 09:35 -0.21 13.748
22/01/2009 17:20 -0.64 3.984
22/10/2009 13:40 -0.860 0.817
19/11/2009 12:05 -0.680 4.053

Time Series Data

The recorded levels (not corrected for atmospheric pressure) and temperature are shown below, separated out by month.





Document last modified: Fri Feb 20 2015 11:12:34 GMT Standard Time