Darby, S.E.; Hackney, C.R.; Parsons, D.R.; Tri, P.D.V.

Water and suspended sediment discharges for the Mekong Delta, Vietnam (2005-2015)

This dataset describes hourly time series of discharge and suspended sediment flux at four sites in the Vietnamese Mekong Delta (Chau Doc, Tan Chau, Can Tho and My Thaun) for the period 2005 – 2015. This data was calculated from historic Acoustic Doppler Current Profiler (aDcp)data obtained as part of routine flood monitoring conducted by the Vietnamese Hydrological Agency. The data were collated by the authors.

The data were processed to back out sediment fluxes through the delta through calibration of the acoustic backscatter signal to suspended sediment concentrations collected in Chau Doc (May 2017) and Can Tho (September 2017). For each aDcp instrument acoustic backscatter signal was calibrated to observed suspended sediment concentrations (SSCs). These concentrations values were then matched to measured acoustic backscatter values (dB) from the depth at which each sample was taken to generate power law calibration curves. To generate daily fluxes, the point specific ADCP fluxes were used to generate sediment ratings curves between sediment flux (kg/s) and discharge (m3/s). These ratings curves were then propagated over recorded daily discharge values measured by the Vietnamese hydrological agency to provide daily fluxes over the period of record.

The work was funded through NERC grant reference NE/P008100/1 - Deciphering the dominant drivers of contemporary relative sea-level change: Analysing sediment deposition and subsidence in a vulnerable mega-delta.

Publication date: 2020-06-26

Get the data

This dataset is available under the terms of the Open Government Licence

Format of the data: Comma-separated values (CSV)

You must cite: Darby, S.E.; Hackney, C.R.; Parsons, D.R.; Tri, P.D.V. (2020). Water and suspended sediment discharges for the Mekong Delta, Vietnam (2005-2015). NERC Environmental Information Data Centre. https://doi.org/10.5285/ac5b28ca-e087-4aec-974a-5a9f84b06595

 

© University of Hull

© University of Southampton

© Can Tho University

Where/When

Study area
Temporal extent
2005-01-01    to    2015-12-31

Provenance & quality

Each ADCP instruments acoustic backscatter signal was calibrated to observed suspended sediment concentrations (SSCs). These concentrations values were then matched to measured acoustic backscatter values (dB) from the depth at which each sample was taken to generate power law calibration curves.

To generate daily fluxes, the point specific ADCP fluxes were used to generate sediment ratings curves between sediment flux (kg/s) and discharge (m3/s). These ratings curves were then propagated over recorded daily discharge values measured by the Vietnamese hydrological agency to provide daily fluxes over the period of record.

Data collation was carried out in Excel. Data were provided as comma seperated value (csv) files for deposit into the EIDC.

Correspondence/contact details

Hackney, C.R.
University of Hull
 C.Hackney@hull.ac.uk

Authors

Darby, S.E.
University of Southampton
Hackney, C.R.
University of Hull
Parsons, D.R.
University of Hull
Tri, P.D.V.
Can Tho University

Other contacts

Custodian
Environmental Information Data Centre
 info@eidc.ac.uk
Publisher
NERC Environmental Information Data Centre
 info@eidc.ac.uk

Additional metadata

Topic categories
Environment
Keywords
acoustic Doppler current profiler,  aDcp,  Mekong Delta,  Sediment,  Vietnam
Funding
Natural Environment Research Council Award: NE/P008100/1
Spatial representation type
Tabular (text)
Last updated
12 May 2021 10:38