Instrument: Brennand grip / Brennand grip weir

Summary Details

ID BRE_grip / BRE_grip_weir
Location # 20.1 / 20.2
Measurement Stage measured at two sites, located in the grip (BRE_grip) & at a weir (BRE_grip_weir)
Catchment Sapling Clough, a headwater tributary of the Brennand
OS Grid ref SD 62692 55949
Elevation 383 m
Area 0.0014 km2
Data availability BRE_grip: 15/05/08 - 06/09/09 & BRE_grip_weir: 26/11/08 - 31/01/10 (weir leakage 26/11/08 - 01/12/08 & 06/06/09 - 25/06/09)
Location A grip feature that was blocked upstream of the gauge location in in Nov 2008.
Abstractions No upstream United Utilities abstraction points
Related sites Upstream site: none; downstream site BRE_sap; other sites in Brennand subcatchment, BRE_rhw and BRE_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 (1.7mb). (For details on using the data click here.)

Land Use / Management Changes

The main land use management change is the blocking of the grip, but stocking density has also been reduced on the moor.

  • Change Work carried out % area affected
    Grip blocking Nov 2008 100
    Stocking density Spring 2008 100
    Total 100

Photographs

  • Relative positions of BRE_grip and BRE_grip_weir
  • Penny Anderson Associates water level monitoring site
  • Upstream view

Channel Description

The channel cross-section at the BRE_grip 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

A theoretical stage-discharge relationship exists for BRE_grip_weir (a V-notch thin plate weir conforming to BS3680). Rating points for BRE_grip are provided below.

Stage (m) Discharge (m3/s) Date Time
-0.975 0.00004 15/08/2008 14:10
-0.96 0.00138 23/10/2008 14:20

Time Series Data

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

Grip Level: BRE_grip

Weir Level: BRE_grip_weir





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