README FILE
Dataset Title: Langham Treatment Wetland Diel Nutrient Dynamics Dataset (2025)

GENERAL INFORMATION

Title of Dataset
Langham Treatment Wetland Diel Water Quality and Nutrient Dynamics Dataset (2025)

Date of Data Collection
2025

Location of Data Collection
Langham Treatment Wetland

Keywords
Treatment wetlands, diel sampling, high-frequency monitoring, nutrient dynamics, phosphorus cycling, dissolved oxygen, wastewater treatment, temporal variability, ecological engineering, surface flow wetlands

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

Collaborating Organisations
Anglian Water
Norfolk Rivers Trust

Supervisory Institution
Cranfield University

Funding Source
This dataset was generated as part of a PhD research project investigating temporal nutrient dynamics, diel variability, and treatment wetland biogeochemical processes.

METHODOLOGICAL INFORMATION

Description of Dataset
This dataset contains high-frequency diel water quality monitoring data collected from the Langham treatment wetland during 2025.

The dataset includes:

* repeated water quality measurements,
* nutrient concentration monitoring,
* dissolved oxygen observations,
* and temporal variability assessments.

The dataset was developed to investigate:

* diel nutrient cycling,
* temporal fluctuations in treatment performance,
* dissolved oxygen dynamics,
* phosphorus transformation behaviour,
* and the limitations of conventional grab sampling approaches.

Description of Data Collection
Water samples and field measurements were collected at repeated intervals over continuous monitoring periods throughout the treatment wetland system.

Sampling was undertaken at designated monitoring locations including:

* inlet locations,
* internal treatment compartments,
* and outlet locations.

Measured parameters may include:

* Total phosphorus (TP)
* Orthophosphate phosphorus (Ortho-P)
* Total nitrogen (TN)
* Ammonium nitrogen (NH4-N)
* Total oxidised nitrogen (TON/N)
* Dissolved oxygen (DO)
* pH
* Temperature
* Total organic carbon (TOC)
* Turbidity

Analytical Methods

High-Frequency Monitoring
Sampling was undertaken at repeated intervals over extended monitoring periods to capture diel variability in water quality and nutrient dynamics.

Water Quality Analysis
Water quality analyses were undertaken using standard wastewater laboratory analytical procedures.

Field Chemistry Measurements
Dissolved oxygen, pH, temperature, and associated physicochemical parameters were measured using calibrated field instrumentation.

Temporal Analysis
Time-series analysis approaches were used to assess diel variability, concentration fluctuations, and temporal treatment behaviour.

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

Measurements represent real-world hydraulic, environmental, and treatment wetland conditions.

Quality Assurance / Quality Control (QA/QC)

* Sampling intervals were standardised throughout monitoring periods.
* Field instrumentation was calibrated prior to deployment.
* Laboratory analyses followed standard analytical procedures.
* 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 Anglian Water and Norfolk Rivers Trust.

Users should acknowledge Cranfield University, Anglian Water, and Norfolk Rivers Trust where appropriate.

Associated Publications
This dataset contributes to ongoing PhD research examining temporal nutrient dynamics, diel variability, and treatment wetland biogeochemical functioning.

Recommended Citation
Souleymane, A. A. (2026). Langham Treatment Wetland Diel Water Quality and Nutrient Dynamics Dataset (2025). Cranfield University.

FILE NAME STRUCTURE AND FORMAT

File Name
LAN_TW_Diel_NutrientDynamics_2025_v01.csv

File Structure
Single comma-separated values (CSV) file containing high-frequency diel water quality monitoring data.

File Format
CSV (Comma-Separated Values)

Date Format
YYYY-MM-DD HH:MM where applicable.

DATA-SPECIFIC INFORMATION

Dataset Description
The dataset contains high-frequency water quality and nutrient monitoring measurements collected from the Langham treatment wetland during 2025.

Variable Definitions

Water Quality Variables

* TP = Total Phosphorus
* Ortho-P = Orthophosphate Phosphorus
* TN = Total Nitrogen
* NH4-N = Ammonium Nitrogen
* TON/N = Total Oxidised Nitrogen
* DO = Dissolved Oxygen
* pH = Acidity/alkalinity measurement
* Temperature = Water temperature
* TOC = Total Organic Carbon
* Turbidity = Water turbidity

Temporal Variables

* Sampling date
* Sampling time
* Monitoring location
* Sampling interval

Units of Measurement
Concentration data are reported in milligrams per litre (mg/L) unless otherwise stated. Temperature may be reported in °C. Dissolved oxygen may be reported in mg/L.

Missing Data Codes
Blank cells indicate unavailable or missing measurements.

Abbreviations

* TW = Treatment Wetland
* TP = Total Phosphorus
* TN = Total Nitrogen
* NH4-N = Ammonium Nitrogen
* DO = Dissolved Oxygen

VERSIONING

Version
Version 1.0

Last Updated
2026-05-29

Change Log
Version 1.0 – Initial compilation and documentation of Langham treatment wetland diel nutrient dynamics dataset.
