Integrated sensing and sampling system for catchment based ... · • Sensors for water level, flow...
Transcript of Integrated sensing and sampling system for catchment based ... · • Sensors for water level, flow...
Integrated sensing and sampling system for catchment basedresearch.
Simon Browning
Presentation Outline
• Introduction
• Catchment monitoring toolbox
• NERC DOMAINE Project
• Background
• Sensors
• Integration
Wavelength Environmental
What we do….• Sensors for water level, flow and water quality
• Wireless telemetry networks
• Integrated sensor systems
• Remote control and data visualisation
• Diffuse pollution and catchment monitoring
• Installation, maintenance and calibrations
• Groundwater and borehole monitoring
• Environmental science and research
Catchment monitoring tools
What’s in a Catchment Monitoring tool box?
• Sensors for water quality
• Options for monitoring flow and water level
• Automatic samplers
• Flexible wireless telemetry
These should all be:
LOW POWER
LOW MAINTENANCE
SMALL FOOTPRINT
Sensors for water quality
• TempHion – for pH and redox potential2 x AA batteries last 18 months, sensor stablefor 6 months
• Turbo turbidity sensorBuilt in wiper, external battery pack lasts fourmonths or more
• DO2 – dissolved oxygen sensorRobust fluorescence sensor does not requirefrequent calibration or cleaning
Sensors for water quality
• Hydrolab – with active anti-fouling for extended deploymentsTemperature pH / redox potentialConductivity Dissolved oxygenTurbidity Chlorophyll-aAmmonium Nitrate
• Cycle P - In-situ dissolved phosphate analyserDesigned for unattended operationOn-board reagent cartridges are stable for > 3 monthsSufficient for > 1000 testsMax. sample rate 2 per hour
• SUNA V2 – Submersible Ultraviolet Nitrate AnalyserChemical-free nitrate sensorDesigned for long-term unattended operationOptional bio-wiper
Monitoring flow and water level
• Area Velocity flow measurementAcoustic Doppler or electromagnetic sensorsCan be installed in river/stream channelNo need for flumes or weirs
• FLO-DAR non contact AV flow measurementDigital Doppler radar velocity-sensing plus ultrasoniclevel-sensing
Minimal maintenance
• Pressure transducersVented / non-vented options
With or without batteries and data logging
Portable automatic water samplers
• SD900 Portable samplerIntuitive and easy to useTime-, volume- and event proportional samplingMultiple bottle optionsPassive or active cooling
Flexible wireless telemetry
• ADCONCompact, low power RTUs (Remote Telemetry Unit)Designed for ease of deployment in the fieldCan build networks from GPRS and UHF radio unitsIdeal for large numbers of sensorsCentralised intelligence/control
• OTT NetDLExtremely low power IP enabled data loggerLocal control for critical applicationsMultiple sensor inputsCheck data and status on site with local displayLocal data download to USB stick
NERC DOMAINE Project
www.nerc-domaine.co.uk
NERC DOMAINE – Background
• Intensification of agriculture and greater use of fossil fuels hasled to an increase in the levels of Nitrogen found in our rivers
• Agriculture and waste water treatment works can produce anexcess of Phosphorus which then enters water bodies
• Rising trends in dissolved organic matter (including Carbon andNitrogen) in surface and coastal waters have been reported
• Organic carbon compounds in water can form carcinogenictrihalomethanes (THM) during water treatment processes,removal of these increases treatment costs
• Control of excess nutrients is required to help rivers reach goodecological status as defined in the EU Water FrameworkDirective
NERC DOMAINE Project
• Funded by NERC Large Grant – due to run 2014 – 2018
• Led by Prof. Penny Johnes at the University of Bristol incollaboration with Bangor University, the University of EastAnglia and the Centre for Ecology and Hydrology
• Assess the origins, transport and downstream export ofdissolved organic carbon, nitrogen and phosphorus
• Assess the ecosystem functional significance and widerenvironmental and human health impacts of DOM flux
Penny Johnes, Richard Evershed, Chris Yates, University of BristolDavey Jones, Chris Freeman, Peter Golyshin, Nathalie Fenner, Bangor University
Stephen Maberly and Chris Evans, Centre for Ecology and HydrologyTim Jickells, University of East Anglia
DOMAINE monitoring
• 2015 – 2018 field monitoring campaign
• 2 contrasting catchments – 3 sites ineach
• Hampshire Avon – lowland agriculturalcatchment
• Conwy – upland catchment comprisingmountain moorland, peat andcommercial forestry
• In-stream monitoring complimented byextensive laboratory analyses at themolecular scale
DOMAINE monitoring cont.
• Each catchment has two monitoring stations on the maintributaries and one at the base of the catchment
• 4 x ‘Lower’ spec sites comprise:• Hydrolab MS5 - temperature, pH, conductivity, dissolved oxygen• Hach Flow FL900 - velocity, water level, discharge• Hach Lange SD900 - portable sampler with 24 x 1 litre bottles• OTT NetDL 500 - data logger, sample trigger management
• 2 x ‘Higher’ spec sites add:• Hydrolab MS5 - same as low spec but with added turbidity• SUNA V2 - nitrate concentration, UV absorbance spectrum• Seabird ECO - fluorometers for chlorophyll-a and CDOM
DOMAINE sensors: SUNA V2• First introduced in 2008, developed from the original MBARI ISUS
UV LIGHT SOURCE UV SPECTROMETER
• V2 Introduced in 2013 with:– Adaptive sampling – responsive light output– Shortened path length – turbidity up to 1250 NTU– Outputs: Nitrate, absorbance at 254 and 350nm, full
spectra stored– Internal memory/ USB connection
DOMAINE sensors: SUNA V2
www.state.nj.us/dep/wms//NitrateSensorsProjectResults20110209.pdf
SUNA
DOMAINE sensors: SUNA V2Nitrate Free
Water
Nitrate RepleteWater
Absorptiondue to Nitrate
System integration
Triggered viapulse output
MODBUS to SDI-12converter
SDI-12 as standard
Data out viaSDI-12 option
HACH SIGMA 900 SDPORTABLE SAMPLER
HACH FL9000 AVFLOW LOGGER
SEABIRD ECO FL CDOM ANDCHLOROPHYLL
SEABIRDSUNA V2
HYDROLABMS5 SONDE
RS232 or analogueoutput options
Full spectrum accessible viaDB9 (RS232) connector
DOMAINE monitoring cont.
WOODEN ENCLOSURE WITHBATTERIES AND SOLAR
CHARGING
OTT NetDL 500
• Extremely low power data logger/controller – can take in multiple sensorinterfaces
• Collates and time-stamps data from allsensors in one file
• Raw voltages and calculated concentrations can be stored
• Local control means sample trigger is not dependant on mobilephone network
System integration…
TEMPERATURE
PHREDOX
DISSOLVED OXYGEN
CONDUCTIVITY
TURBIDITY
CHLOROPHYLL
CDOMNITRATE
UV ABSORBANCE
FLOW
WATER LEVEL
AUTO-SAMPLER TRIGGER
System integration…
NetDL Configuration
NetDL Remote Access
Conclusions
• We have a wide range of tools for catchment monitoring – fromSmart Sensors for key parameters to sophisticated analysers fornitrate or phosphate
• These are all optimised for low power, long term deploymentand low maintenance
• Often deployed at key points in a catchment – e.g. upstream/downstream of pollution source or intervention measures
• When a sophisticated, integrated suite of sensors is required –we have the tools and the expertise to streamline the set up andoperation
Seabird coastal will be taking part in the Alliance for CoastalTechnologies ‘Nutrient Sensor Challenge’
www.act-us.info/nutrients-challenge/
Challenge aims to accelerate the development of affordable, accurate andreliable sensors for nitrate and/or phosphate
Sensors must: Provide accurate and precise real-time dataBe easy to useBe capable of unattended deployment for 3 monthsCost less than $5,000 to buy
Testing February to September 2015 – results December 2016
www.wavelength-environmental.co.uk