README FILE
Dataset Title: CLI_ICW_GHGFlux_2025_v01

GENERAL INFORMATION

Title of Dataset
Clifton Integrated Constructed Wetland (ICW) Greenhouse Gas Flux Dataset (2025)

Date of Data Collection
2025

Location of Data Collection
Clifton Integrated Constructed Wetland (ICW), Doncaster, England, United Kingdom

Keywords
Integrated Constructed Wetlands (ICWs), greenhouse gas emissions, methane flux, carbon dioxide flux, carbon dynamics, wastewater treatment, wetland emissions, ecological engineering, carbon cycling, nature-based solutions

Data Collection and Analysis
Ayisha Affo Souleymane
PhD Researcher
School of Water, Energy and Environment
Cranfield University

Collaborating Organisation
Yorkshire Water

Supervisory Institution
Cranfield University

Funding Source
This dataset was generated as part of a PhD research project investigating greenhouse gas emissions, carbon dynamics, and multifunctionality within integrated constructed wetlands.

METHODOLOGICAL INFORMATION

Description of Dataset
This dataset contains greenhouse gas (GHG) flux measurements collected from the Clifton Integrated Constructed Wetland (ICW) during 2025.

The dataset includes measurements associated with:

* methane (CH4) emissions,
* carbon dioxide (CO2) emissions,
* gas flux calculations,
* and carbon cycling dynamics within the wetland treatment system.

The dataset was developed to investigate:

* greenhouse gas emissions,
* spatial variability in flux behaviour,
* carbon storage and release,
* and the environmental performance of integrated constructed wetlands.

Description of Data Collection
Gas samples were collected from designated monitoring locations throughout the treatment wetland system using chamber-based gas sampling approaches.

Sampling locations may include:

* wetland surface zones,
* vegetated areas,
* open water areas,
* and sediment-associated sampling points.

Collected gas samples were analysed to quantify greenhouse gas concentrations and associated flux rates.

Measured parameters may include:

* Methane concentration (CH4)
* Carbon dioxide concentration (CO2)
* Flux rate estimates
* Chamber volume
* Sampling duration
* Temperature
* Sampling location

Analytical Methods

Gas Sampling
Gas flux measurements were undertaken using chamber-based gas sampling procedures.

Headspace gas samples were collected over defined incubation periods and transferred for laboratory analysis.

Gas Analysis
Collected gas samples were analysed using gas chromatography procedures where applicable.

Flux Calculations
Greenhouse gas fluxes were calculated using measured concentration changes over time, chamber dimensions, temperature corrections, and sampling duration.

Flux calculations may include:

* area-normalised flux estimates,
* temporal emission rates,
* and carbon equivalent calculations.

Experimental Conditions
Sampling was undertaken under operational full-scale wastewater treatment wetland conditions during 2025.

Measurements represent real-world environmental and treatment wetland conditions.

Quality Assurance / Quality Control (QA/QC)

* Sampling procedures were standardised across locations.
* Chamber deployment periods were controlled during measurements.
* Laboratory instrumentation was calibrated prior to analysis.
* Data were checked for transcription and calculation errors prior to analysis.
* Missing values were retained as blank cells where applicable.

SHARING AND ACCESS INFORMATION

License and Restrictions
Dataset generated as part of doctoral research at Cranfield University in collaboration with Yorkshire Water.

Users should acknowledge Cranfield University and Yorkshire Water where appropriate.

Associated Publications
This dataset contributes to ongoing PhD research examining greenhouse gas emissions, carbon dynamics, and environmental multifunctionality within integrated constructed wetlands.

Recommended Citation
Souleymane, A. A. (2026). Clifton Integrated Constructed Wetland Greenhouse Gas Flux Dataset (2025). Cranfield University.

FILE NAME STRUCTURE AND FORMAT

File Name
CLI_ICW_GHGFlux_2025_v01.csv

File Structure
Single comma-separated values (CSV) file containing greenhouse gas concentration and flux measurements.

File Format
CSV (Comma-Separated Values)

Date Format
YYYY-MM-DD where applicable.

DATA-SPECIFIC INFORMATION

Dataset Description
The dataset contains greenhouse gas concentration and flux measurements collected from multiple locations within the Clifton ICW during 2025.

Variable Definitions

Flux Variables

* CH4 concentration = Methane concentration
* CO2 concentration = Carbon dioxide concentration
* Flux rate = Calculated greenhouse gas emission rate
* Sampling duration = Chamber incubation period
* Chamber volume = Chamber headspace volume
* Temperature = Sampling temperature
* Sampling location = Monitoring location identifier

Units of Measurement
Gas concentrations may be reported in parts per million (ppm) or microlitres per litre (µL/L). Flux rates may be reported in mg/m²/day, mg C/m²/day, or equivalent units unless otherwise stated.

Missing Data Codes
Blank cells indicate unavailable or missing measurements.

Abbreviations

* ICW = Integrated Constructed Wetland
* GHG = Greenhouse Gas
* CH4 = Methane
* CO2 = Carbon Dioxide

VERSIONING

Version
Version 1.0

Last Updated
2026-05-29

Change Log
Version 1.0 – Initial compilation and documentation of Clifton ICW greenhouse gas flux dataset.
