Abstract
Accurate discharge measurements are essential for hydrological monitoring in peatland environments, where traditional rating curves assigned to flumes can exhibit variability across different water levels. Common tracers, such as fluorescent dyes, are often unsuitable in peatlands due to interference from high concentrations of dissolved organic matter and the unique hydrological dynamics of these ecosystems. This study presents an alternative method for measuring discharge using salt tracer dilution at four site locations within a peatland catchment. Sodium chloride tracer is injected remotely using an ISCO autosampler and downstream conductivity is continuously measured with an OTT sensor. Discharge is calculated by analysing conductivity changes, which are linked to the salt tracer concentration. This approach allows for the development of site-specific ratings for varying flow stages, improving discharge accuracy. The remote activation of the tracer injection system enables high-frequency data collection during rainfall events and fluctuating flow conditions, reducing the need for on-site monitoring and enhancing the precision of hydrological data for effective water management and restoration projects.
| Original language | English (Ireland) |
|---|---|
| Title of host publication | Groundwater & Geotechnical Investigations |
| Subtitle of host publication | International Association of Hydrogeologists (Irish Group) Annual Meeting |
| Publication status | Published - 15 Apr 2025 |