86f17d61-141f-4500-9aa5-26a82aef0b33 English ISO/IEC 8859-1 (also known as Latin 1) dataset dataset NERC EDS Environmental Information Data Centre Lancaster Environment Centre, Library Avenue, Bailrigg Lancaster LA1 4AP UK info@eidc.ac.uk https://eidc.ac.uk/ EIDC website The Environmental Information Data Centre (EIDC) is the UK's national data centre for terrestrial and freshwater sciences. information pointOfContact 2025-11-21T10:08:28 UK GEMINI 2.3 WGS 84 Flow velocity, discharge, and suspended sediment compositions of the Irrawaddy and Salween Rivers, 2017-2019 2020-07-24 publication https://catalogue.ceh.ac.uk/id/86f17d61-141f-4500-9aa5-26a82aef0b33 10.5285/86f17d61-141f-4500-9aa5-26a82aef0b33 doi: Baronas, J.J., Tipper, E.T., Bickle, M.J., Stevenson, E.I., Hilton, R.G. (2020). Flow velocity, discharge, and suspended sediment compositions of the Irrawaddy and Salween Rivers, 2017-2019. NERC Environmental Information Data Centre 10.5285/86f17d61-141f-4500-9aa5-26a82aef0b33 This dataset contains water flow velocity, discharge, and suspended sediment compositions of the Irrawaddy (Ayeyarwady) River at Pyay, Myanmar and the Salween (Thanlwin) River at Hpa-An, Myanmar. The suspended sediment samples and the hydrological data were collected both during peak monsoon conditions (August 2017 and August 2018) and peak dry season conditions (February 2018 and May 2019). Water velocity was measured using Acoustic Doppler Current Profiler (ADCP) while collecting suspended sediment samples at various depths in the river. Additional flow velocity data was collected while laterally crossing the river channel from bank to bank, and was used to calculate total river discharge at these sites. The dataset includes suspended sediment concentrations, particulate organic carbon concentrations, and particle size distributions of sediment samples collected at various depths and locations in the two river channels. Full details about this dataset can be found at https://doi.org/10.5285/86f17d61-141f-4500-9aa5-26a82aef0b33 Baronas, J.J. University of Cambridge jotautas.baronas@gmail.com https://orcid.org/0000-0002-4027-3965 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Tipper, E.T. University of Cambridge ett20@cam.ac.uk https://orcid.org/0000-0003-3540-3558 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Bickle, M.J. University of Cambridge mb72@cam.ac.uk https://orcid.org/0000-0001-8889-3410 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Stevenson, E.I. University of Cambridge eis22@cam.ac.uk https://orcid.org/0000-0003-3907-443X ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Hilton, R.G. Durham University r.g.hilton@durham.ac.uk https://orcid.org/0000-0002-0499-3332 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Baronas, J.J. University of Cambridge jotautas.baronas@gmail.com pointOfContact NERC EDS Environmental Information Data Centre info@eidc.ac.uk custodian NERC Environmental Information Data Centre info@eidc.ac.uk publisher University of Cambridge enquiries@enterprise.cam.ac.uk owner Durham University info@dcc.ac.uk owner Environmental survey Water quality Hydrology Modelling Irrawaddy river Salween river Myanmar Discharge Suspended sediment concentrations Particle size Organic carbon otherRestrictions no limitations otherRestrictions This resource is available under the terms of the Open Government Licence otherRestrictions If you reuse this data, you should cite: Baronas, J.J., Tipper, E.T., Bickle, M.J., Stevenson, E.I., Hilton, R.G. (2020). Flow velocity, discharge, and suspended sediment compositions of the Irrawaddy and Salween Rivers, 2017-2019. NERC Environmental Information Data Centre https://doi.org/10.5285/86f17d61-141f-4500-9aa5-26a82aef0b33 textTable 100 English utf8 inlandWaters 2017-08-23 2019-05-21 95.187 97.647 16.943 18.875 Comma-separated values (CSV) Text NERC EDS Environmental Information Data Centre info@eidc.ac.uk distributor https://catalogue.ceh.ac.uk/datastore/eidchub/86f17d61-141f-4500-9aa5-26a82aef0b33 Download the data Download a copy of this data fileAccess https://data-package.ceh.ac.uk/sd/86f17d61-141f-4500-9aa5-26a82aef0b33.zip Supporting information Supporting information available to assist in re-use of this dataset information dataset dataset 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 2010-12-08 Flow velocity was measured using an Acoustic Doppler Current Profiler (ADCP) Rio Grande II 1200 kHz (Teledyne Instruments). deployed on a moving boat. The ADCP was attached on a rigid frame close to the bow, in a down-facing orientation, and the transducer submerged at 40-60 cm depth. Data were collected while the boat crossed the river perpendicular to the flow. Boat position during the transect was recorded using an external GPS unit with horizontal accuracy of <5 m. Between 1 and 5 such transects were collected, depending on the site, with total discharge reproducibility typically better than 6%. Additional flow velocity data were collected during suspended sediment sampling in August 2018 and May 2019 while the boat was drifting with the current. ADCP data were collected and initially processed using WinRiver II software. The data were then exported and further processed using Velocity Mapping Toolbox. Using multiple river cross-sectional transects, a mean cross-section was created for each sampling date, ensuring it was perpendicular to the river channel, and calculating the average stream-wise flow velocity field across the river channel. The data were then additionally processed in MATLAB 2019b, filling data gaps, removing erroneous outlier data, and calculating total discharge. Both the raw flow velocity (WinRiver-exported) data and the processed flow velocity and discharge data are included in this dataset. Depth profiles of suspended sediments were collected in August 2017, August 2018, and May 2019 at both sites. Only surface sediment samples were collected in February 2018. Sediment samples were collected at various depths using a modified Van Dorn style depth sampler while the boat was drifting with the flow. Samples were transferred into 10 L sterile polyethylene bags, ensuring complete transfer of all sediment particles. The bags were weighed and the samples filtered within 24h using 0.2μm polyethersulfone (PES) membrane and freeze-dried back in the lab. Particle size distributions of dried samples were measured using laser diffractometry. The organic carbon concentration (as weight %) was measured using coupled elemental analysis - isotope ratio mass spectrometry (EA-IRMS) after carbonate removal using liquid HCl. All methods are described in detail in the supporting documentation.