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Measurement Data Component

Title: Hampshire Avon DTC Deposited fine-grained sediment monitoring data 2010-2013
Related Party - Individual (Principal Investigator): Doctor J. Iwan Jones* (Queen Mary University of London) Email address: j.i.jones@qmul.ac.uk
Related Party - Organisation (Funder): Defra
Abstract:
At each of the 11 DTC ecological monitoing sites we estimated the mass and organic content of fine sediment in the river bed in spring and autumn of each year. We sampled the deposited sediment in the river bed using the sediment resuspension technique first described in Lambert and Walling (1988) and subsequently by Duerdoth et al. (2015). A steel cylinder (height 75 cm, diameter 48.5 cm) is inserted into an undisturbed section of the stream bed and the water column vigorously agitated for one minute, without touching the stream bed, to raise any fine sediment deposited on the surface of the stream bed. A water sample is then immediately collected from within the cylinder. The stream bed is then disturbed to a depth of approximately 10 cm, and the water and bed vigorously agitated for one minute to raise any sub-surface fine sediment in addition to the re-suspended surface deposits. A second water sample is immediately collected from within the cylinder. Four such pairs of water samples (surface, and combined surface and subsurface) are collected from each site, two from erosional patches and two from depositional patches. Data are presented as gm-2.
Subject Keywords: Fine sedimentRiversBenthic environment
Geographic Keywords: Avon (Hampshire)Tamar
Observed Properties: DateMassRiversSite surveys
Parameter: Reach-average Total % Organic
Parameter: Reach-average Total mass of fine sediment g/m2
Parameter: Reach-average Total mass of volatile fine sediment g/m2
Parameter: River Name
Parameter: Sample Date
Parameter: Site Name

Geographic Extent -
    Longitude (West): -4.542589
    Longitude (East): -1.991100
    Latitude (South): 50.670085
    Latitude (North): 51.135872

Phenomenon Time -  Start Date/Time: 2010-10-01 00:00:00 End Date/Time:  2014-12-31 00:00:00
Result Time: 2014-12-31 00:00:00
Valid Time -  Start Date/Time: 2010-10-01 00:00:00
Feature of Interest: hydrosphere
Documentation: Assessment of a rapid method for quantitative reach-scale estimates of deposited fine sediment in rivers
Publication Date: 2016-05-09

This data is made available under the terms of the Open Government Licence (Version 3).

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