Hydrology

Flux Enviro supports hydrologists, environmental consultants, researchers and site operators with equipment and monitoring solutions for surface water level, flow, rainfall, water quality and long-term hydrological monitoring.

From individual field measurements and hydrometric surveys through to permanent gauging stations and remotely connected multi-sensor networks, we can support individual monitoring requirements or develop complete systems around the site, catchment and project objectives.

Surface Water Level Monitoring

Surface water level monitoring provides a record of changing conditions in rivers, streams, lakes, wetlands and drainage systems. Measurements may support flood and drought monitoring, catchment studies, abstraction and discharge assessment, environmental compliance, and the calculation of flow at established gauging locations and control structures.

Depending on the application, monitoring can range from manual reference measurements and staff gauges through to continuous pressure measurement and remotely connected monitoring systems.

Our surface water level monitoring solutions include:

• Pressure-based water level monitoring using absolute loggers or vented sensors

• Staff gauges and manual reference measurements

• Stilling wells, sensor mounting and protection systems

• Remote water level telemetry, from individual monitoring points to multi-site sensor networks

Flow Measurement

Flow measurement is fundamental to hydrological monitoring, but the most appropriate method depends on the channel geometry, water depth, velocity, hydraulic conditions, expected flow range and monitoring duration. Measurements may range from individual discharge gaugings through to permanent continuous flow monitoring installations.

Flux Enviro provides equipment and technical support across a range of hydrometric methods, including:

• Acoustic Doppler Velocimeters (ADV) for point velocity and wading measurements

• Acoustic Doppler Current Profilers (ADCP) for river discharge measurement and velocity profiling

• Manual and autonomous ADCP deployment platforms for larger or difficult-to-access channels

• Fixed Doppler velocity sensors for continuous monitoring in open channels and partially filled pipes

• Weirs and flumes for established stage-discharge measurement

• Water level monitoring and gauging systems for rating-curve applications

• Portable flow and velocity meters for spot measurements and surveys

Selection of the correct monitoring approach is critical to obtaining representative data. Site hydraulics, expected flow range, channel geometry, installation constraints and monitoring objectives should therefore be considered before selecting the measurement method and instrumentation.

Surface Water Quality Monitoring

Water quality monitoring provides important information on changing conditions within rivers, streams, lakes, reservoirs and other surface waters, supporting routine monitoring, catchment studies, environmental research, pollution investigation and long-term assessment.

Flux Enviro provides equipment for spot measurements, water sampling and continuous multiparameter monitoring. YSI handheld instruments provide flexible field measurement for routine surveys and verification, while YSI EXO multiparameter sondes provide configurable platforms for continuous and longer-term deployments.

Our solutions include:

• Multiparameter handheld meters including YSI ProDSS and ProQuatro

• Dissolved oxygen meters including YSI ProSolo ODO

• YSI EXO multiparameter sondes for continuous deployment

• Automatic and composite water samplers

• Manual and telescopic sampling equipment

Parameters can include temperature, conductivity, dissolved oxygen, pH, ORP, turbidity, chlorophyll a, blue-green algae, fDOM, depth/pressure, ammonium, chloride and nitrate, together with derived measurements including specific conductance, salinity, TDS and resistivity.

For longer-term monitoring, water quality instrumentation can be integrated with remote telemetry, allowing water quality to be monitored alongside water level, flow, rainfall and meteorological data within the same monitoring network.

Rainfall & Catchment Monitoring

Rainfall and meteorological monitoring provide important context for understanding catchment response, changes in river level and flow, and variations in water quality. Data can support catchment studies, flood and drought monitoring, environmental research and hydrological modelling.

Monitoring systems can include:

• Rainfall

• Air temperature

• Relative humidity

• Barometric pressure

• Wind speed and direction

• Solar radiation

Systems can range from standalone rainfall or meteorological stations through to multi-location, multi-sensor catchment monitoring networks, integrating rainfall with water level, flow, water quality and other hydrological measurements.

Remote Monitoring & Telemetry

Remote monitoring allows water level, flow, rainfall, water quality and meteorological data to be collected continuously and accessed without routine site visits. Systems can range from individual remote monitoring units through to multi-parameter stations and multi-location catchment monitoring networks.

Monitoring systems can include:

• Cellular telemetry and remote communications

• Cloud-based data access

• Automated alarms, notifications and reporting

• SDI-12, Modbus and analogue sensor integration

• Solar, mains and battery power systems

Flux Enviro can provide the complete remote monitoring system, integrating sensors, data loggers, telemetry, communications, power supplies, enclosures and mounting hardware, with systems configured and tested prior to deployment.

Depending on the application, systems can be supplied for client installation or supported with installation, commissioning, telemetry configuration, user training and ongoing technical support.

Permanent Hydrological Monitoring Stations

Reliable long-term hydrological monitoring depends on more than the instrumentation itself. Sensor location, hydraulic conditions, mounting arrangements, power, communications, physical protection and maintenance access can all influence the quality, reliability and continuity of monitoring data.

Flux Enviro can design and deliver permanent monitoring stations around the site conditions, monitoring objectives and expected service life, integrating the required sensors with appropriate power, communications, mounting and protection systems.

Site assessment → System design → Telemetry configuration → Equipment supply → Installation → Commissioning → Servicing & maintenance

Systems can range from single-parameter gauging stations to complete multi-sensor installations combining water level, flow, rainfall, water quality and meteorological measurements.

Our aim is to provide monitoring installations that are representative, reliable, maintainable and suited to long-term field deployment.