Identification

Title

Conwy Catchment - Nant Y Brwyn Discharge dataset (2008-2011)

Abstract

Discharge data and in-stream temperature for a peatland headwater stream of the Conwy catchment, North Wales are presented from March 2008 until July 2011. The stream for which the data represents is the Nant y Brwyn situated on the Migneint blanket bog within Snowdonia National Park. The purpose of the data is to calculate annual run-off estimates for the Nant y Brwyn catchment and to provide support for estimating fluvial carbon fluxes. Note: there are gaps in this data set due to equipment/battery failures and/or freezing of the stream. Note dates added to dataset name on 22/06/2017 Full details about this dataset can be found at https://doi.org/10.5285/cd7db09f-edf6-4b06-b878-f1be6c649e3a

Resource type

dataset

Resource locator

https://data-package.ceh.ac.uk/data/cd7db09f-edf6-4b06-b878-f1be6c649e3a

name: Download the data

description: Get a copy of this data

function: download

https://data-package.ceh.ac.uk/sd/cd7db09f-edf6-4b06-b878-f1be6c649e3a.zip

name: Supporting documents

description: Documents available to assist with re-use of this dataset

function: information

Unique resource identifier

code

https://catalogue.ceh.ac.uk/id/cd7db09f-edf6-4b06-b878-f1be6c649e3a

codeSpace

doi:

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

environment

inlandWaters

Keywords

Keyword set

keyword value

Environmental Monitoring Facilities

originating controlled vocabulary

title

GEMET - INSPIRE themes, version 1.0

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

originating controlled vocabulary

title

GeoNames

reference date

date type

creation

effective date

2006-01-01

Keyword set

keyword value

Hydrometry

Conwy Catchment

Geographic location

West bounding longitude

-4.031

East bounding longitude

-3.592

North bounding latitude

53.31

South bounding latitude

52.944

Temporal reference

Temporal extent

Begin position

2008-03-11

End position

2011-07-14

Dataset reference date

date type

publication

effective date

2011-11-18

date type

creation

effective date

2011-08-25

Frequency of update

annually

Quality and validity

Lineage

Stage (or water depth) and temperature are measured by a Starflow Ultrasonic Doppler Instrument every 5 minutes and averaged and recorded automatically on to an integrated data logger every 15 minutes. This data is downloaded monthly on to a laptop and transferred on to the CEH shared drive which is in turn backed up each evening. The data is then integrated into a master file along with a diary entry for the visit detailing any relevant information or observations. This metadata is then used to help quality check the raw data, along with plotting the data to identify outliers that may be indicative of equipment failure. Data start/finish dates and times are checked to ensure a continuous data series or to note data gaps. A rating curve was produced by carrying out flow gauging over a wide range of stream flow conditions using a SonTek FlowTracker handheld ADV. A particular stream cross-section at the Starflow location was used consistently for these measurements. Velocity was determined at stations separated by 10 cm along the cross-section. Mean station velocity was measured at 0.6 * depth (Vmean=V0.6) and discharge calculated by the FlowTracker software using the default Mid Section discharge equation (Firmware Version 3.7). Calculated discharge was related to the Starflow measured stage averaged over the duration of the FlowTracker measurement (typically 30 to 60 minutes). The fitted regression curve indicated that discharge was exponentially related to stage for depths less than 0.267m, and followed a linear relationship for greater depths. The rating curve is then applied to the stage data to give the final discharge estimates.

Conformity

Conformity report

specification

title

Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

If you reuse this data, you should cite: Burden, A., Norris, D.A., Evans, C.D., Grant, S.J., Williams, D., Evans, D., Callaghan, B., Pomeroy, I. (2011). Conwy Catchment - Nant Y Brwyn Discharge dataset (2008-2011). NERC Environmental Information Data Centre https://doi.org/10.5285/cd7db09f-edf6-4b06-b878-f1be6c649e3a

owner

Metadata on metadata

Metadata point of contact

organisation name

Environmental Information Data Centre

full postal address

Lancaster Environment Centre, Library Avenue, Bailrigg

Lancaster

LA1 4AP

email address

info@eidc.ac.uk

responsible party role

pointOfContact

Metadata date

2020-03-13T14:34:41

Metadata language

eng