Hydrodynamic data from embankment edges of Kumirmari island, Indian Ganges-Brahmaputra-Meghna (GBM) Delta, July-August 2022
bibliographic citation: Ladd, C., Banerjee, S., Balke, T., Chanda, A., Ghosh, T. (2026). Hydrodynamic data from embankment edges of Kumirmari island, Indian Ganges-Brahmaputra-Meghna (GBM) Delta, July-August 2022. NERC EDS Environmental Information Data Centre. https://doi.org/10.5285/19dd0d35-c109-481f-bd24-2e27da5fdccb
description: Hydrodynamics were measured at the base of embankments and foreshores at three locations around Kumirmari island, Indian GBM delta in July-August 2022. Tidal inundation, current velocity, and wave orbital velocity were measured using B4+ Mini Buoys (low-cost bottom mounted floats). Wave heights and energy were measured using RBRSolo3 D | wave sensors. Water depth in front of embankments were measured using a Garmin Aquamap device. Sediment properties were also gathered at each hydrodynamic sensor deployment. The purpose of the survey was to determine the level of hydrological forcing around the island, to provide guidance on coastal flood and erosion protection planning.
provenance: ProvenanceStatement
  label: Data to assess erosion and flood risk along Kumirmari island, Indian GBM delta, was gathered at eastern (22°12′43″N , 088°57′20″E), southern (22°10′40″N , 088°55′55″E), and western (22°12′15″N , 088°54′50″E) sites. Acceleration B4+ Mini Buoys were deployed at the base of embankments and at the bottom of fronting intertidal habitat. Each logger sampled y-axis acceleration at 1 Hz. Unfortunately, some Mini Buoys were lost during deployment. Wave parameters An RBRSolo3 D | wave sensor was deployed at the bottom of fronting intertidal habitat at each site along Kumirmari. Height of the RBRSolo pressure sensor above the bed was 4-5 cm. Velocities were recorded at a rate of 16 Hz in 17-minute bursts continuously. Atmospheric pressure, water density, sensor altitude (height), temperature, conductivity, salinity, and the specific conductivity coefficient were set to 10.1325 dbar, 1.0281 Mg/m³, 0.1 m, 0°C, 42.9140 mS/cm, 35 g/kg, and 0 respectively. 'Wave' default settings were used. Water depth A Garmin Aquamap 100S mounted to a boat measured channel depths at regular intervals along southern and western locations using a Garmin sounder module and transducer. No data was gathered at the eastern location due to poor weather. Soil parameters Soil organic matter content, conductivity (diluted in deionised water at a soil-water ratio of 1:2.5) at 25°C, moisture content, bulk density, and grain size (classified as percentage of sand, silt, and clay) were measured using IS 2720 (part 22), IS 14767, IS 2720 (part 2), IS 2720 (part 8), sieving standards respectively. Coordinates Coordinates were taken using Google Maps on an iPhone 13 Mini. Coordinates are expressed in WGS84 standard. Mean and standard deviation in acceleration were calculated across 1- and 10-minute moving windows respectively. These were then used to assign inundation status (emersed (N), partially inundated (P), or fully submerged (F)) using a calibrated Quadratic Discriminant Analysis model, and current and wav…
spatial: Location
temporal: PeriodOfTime
  start date: 2022-07-01
  end date: 2022-08-31
publisher: NERC EDS Environmental Information Data Centre
subject: Hydrology
subject: Environmental survey
subject: Modelling
subject: Hydrodynamics
subject: Embankments
subject: Ganges Brahmaputra Meghna Delta
subject: India
subject: Coastal flooding
subject: Coastal erosion
was generated by: UKRI GCRF Living Deltas Hub
type: Dataset
available: 2026-05-29
landing page: https://doi.org/10.5285/19dd0d35-c109-481f-bd24-2e27da5fdccb
license: OGL-UK-3.0.ttl
access rights: UNRS
theme: Hydrology
theme: Environmental survey
theme: Modelling
distribution:
  access URL: https://data-package.ceh.ac.uk/data/19dd0d35-c109-481f-bd24-2e27da5fdccb
  license: OGL-UK-3.0.ttl
  access rights: UNRS
  format: Comma-separated values (CSV)
  format: gpkg
creator: Ladd, C.
creator: Banerjee, S.
creator: Balke, T.
creator: Chanda, A.
creator: Ghosh, T.
language: en

Cai Ladd
type: Person
member: Swansea University

NERC EDS Environmental Information Data Centre
type: Organization

Ladd, C.
type: Person
family name: Ladd
given name: Cai
member: Swansea University

Banerjee, S.
type: Person
family name: Banerjee
given name: Sumana
member: Jadavpur University

Balke, T.
type: Person
family name: Balke
given name: Thosten
member: Carl von Ossietzky Universität Oldenburg

Chanda, A.
type: Person
family name: Chanda
given name: Abhra
member: Jadavpur University

Ghosh, T.
type: Person
family name: Ghosh
given name: Tuhin
member: Jadavpur University

Hydrology
type: Concept

Environmental survey
type: Concept

Modelling
type: Concept

Swansea University
type: Organization

Jadavpur University
type: Organization

Carl von Ossietzky Universität Oldenburg
type: Organization

UKRI GCRF Living Deltas Hub
type: Activity