Instrument: Langden Mid

Summary Details

ID LAN_mid
Location # 19
Measurement Stage
Catchment Langden
OS Grid ref SD 63131 51083
Elevation 165.9 m
Area 15.0 km2
Data availability 19/05/2008 - 31/01/2010
Location Mid Langden; downstream of a United Utilities Intake
Abstractions Langden Intake, located upstream, regulates flows
Related sites Upstream site, none; downstream site, LAN_out; other sites in Langden subcatchment, LOS_stock, LOS_mid, LOS_out and HAR_out

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 (991kb). (For details on using the data click here.)

Land Use / Management Changes

This site is primarily to aid in estimating the influences of releases from upstream United Utilities works on downstream flows. Fences were erected to limit stocking to help maintaining upland habitats on the moors and mixed broadleaf trees have been planted.

  • Change Work carried out % area affected
    Stocking density Feb 2009 100
    Tree planting Mar 2009 < 1
    Total 100


  • Downstream view
  • Diver location

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 12:20 -0.950 0.093
18/06/2008 10:10 -0.925 0.172
18/06/2008 10:35 -0.925 0.193
11/11/2008 14:15 -0.835 0.852
12/11/2008 15:55 -0.830 0.942
22/01/2009 16:00 -0.685 2.472
22/09/2009 16:00 -0.930 0.148
21/10/2009 14:55 -0.855 0.603
20/11/2009 15:25 -0.750 1.866

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