Hydrolab and Ott Jointly Provide Full Hydrological Monitoring Solution Presented By D J Catt

Transcription

1 The Hydrological Cycle - Monitoring Locations and Equipment Hydrolab Multiprobe Ott Level Senso Ott Datalogger Portable Data Collection (Vota & PDA) Ott Rain Gauge Ott Flow Sensor Hydromet Softw Ott Communication Ott Ground Station Buyout Items Rain Rivers Sampling Lakes Estuaries and Shallow Ocean Ground Water Hydrolab and Ott Jointly Provide Full Hydrological Monitoring Solution Presented By D J Catt

2 Key Innovations First in-situ water quality multiprobe First submersible ph sensor First 4-electrode conductivity sensor First submersible multiprobe logger First 2 year instrument warranty First 1.75 inch (4.4 cm) multiprobe for groundwater monitoring (H20-G) First in-situ turbidity sensor First to integrate GPS and barometric pressure sensors (Surveyor 4a) First in-situ chlorophyll and ambient light sensors mounted on multiprobe First 3 year instrument warranty First 4-beam ratiometric, in-situ turbidity sensor First NTU Self-Cleaning Turbidity Sensor First multiprobe with blue-green algae fluorometer option Series 5 Multiprobes installed with Hach LDO

3 Product Applications Regulatory Hydro Power Fisheries Management Groundwater Non Point Source Research/Educational Near Coastal Drinking Water Reservoir Waste Water Aquaculture On-Line Real Time Monitoring

4 Hach LDO TM Available only on Series 5 sondes Reduced Maintenance No membrane to replace No more stretching of Teflon membrane with worries about air bubbles, wrinkles or membrane thickness No electrolyte to foul or poison No H 2 S poisoning of the electrolyte No more punctured membranes No anode or cathode to refurbish No circulator needed 2-year sensor warranty 1-year cap warranty LDO is the biggest breakthrough for multi-parameter sondes in 5 years!

5 How Does HachLDO Work? A sensor cap is coated with a luminescent material Probe Blue light from an LED strikes the luminescent chemical on the sensor cap LED Photo Diode LED Sensor Cap The luminescent chemical instantly becomes excited

6 How Does HachLDO Work? As the excited chemical relaxes, it releases red light The red light is detected by a photo diode The time it takes for the chemical to return to a relaxed state is measured LED Photo Diode LED Probe Sensor Cap

7 DS5x MULTIPROBE HACH LDO SENSOR SELF CLEANING TURBIDITY CONDUCTIVITY TEMPERATURE TOTAL DISSOLVED GAS

8 A nephlometer emits a light from an LED at 880nm and a photodiode collects the backscatter (right angle) from particles in the water; no particles, no backscatter Standard sensor is early generation nephlometer The Self-Cleaning sensor has a pad which cleans the lenses on each measurement. Sensor is sunlight resistant and has an averaging feature. 4-Beam is new revolutionary sensor that uses standard backscatter, yet has multiple beams/references checking and rechecking its accuracy. Ranges: Up to 3000 NTU s on Self Cleaning sensor NTU Turbidity 4-Beam / Self-Cleaning / Standard 4-beam Self-Cleaning Standard

9 Chlorophyll a / Blue-Green Algae / Rhodamine WT Based on Turner Designs Cyclops 7 Fluorometer Specifically redesigned to fit in Hydrolab multiprobes The three different parameters use the same basic fluorometer, but the light source and filters are specific to each. Customer can use a Solid Standard, which checks to determine if the fluorometer is still within calibration.

10 Principle of Fluorescence Digital Readout Light Detector Wavelengths specific to compound Wavelengths created by compound, plus stray light Emission Filter Lamp Cuvette or Sample Cell Excitation Filter Many wavelengths of light Specific wavelengths of light

11 Advantages of Fluorescence Specific No two molecules excite and emit at the same wavelength Simple No treatment required for many applications Sensitive Detect 0.02ug/L chlorophyll a Fast Readings taken on-site

12 In vivo chlorophyll applications HABs Limnology Education Remote Sensing in vivo chlorophyll Water Treatment Fisheries Aquaculture Marine Research Extracted chlorophyll (a, b, c, pheo a)

13 Photosythetically Active Radiation Sensor (PAR) Measurement of light intensity at certain points in the water column PAR intensity influences biota that rely on photosynthesis for nutrition Can be ordered as a single sensor or a Dual-PAR sensor for use to measure light both at the surface and down in the water column. Two types of sensors Spherical (Shown) and a flat-faced version for measurements directly above the multiprobe, where sunlight extinction is important.

14 Typical Installations USGS Stream Gauging Station Datalogger Telecom Sampler Flow meter Multiprobe Met Station Datalogger Telecom Rain Gaug Radiation Flow mete Multiprobe

15 Nagasaki Bay, telemetry site

16 USGS San Francisco Bay

17 Taiwan Sun Moon Reservoir

18 Louisville Metro Sewer District Long Term Monitoring Network 28 sites are long term monitoring sites 20 special project sites 2 week interval for data retrieval and general maintenance 15 minute intervals and solar powered Partnering with USGS for discharge only on long term sites Macroinvertabrate and algal surveys are performed on all long term sites

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23 N.C. State University Site Madsen River Site

24 DS4x Post deployment Madsen River Site

25 What is Blue-Green Algae? Scientific description is Cyanobacteria Photosynthetic bacteria present in most freshwater and marine systems Becomes visible when bacteria concentrates and algal blooms float to the surface Heavy toxic concentrations, or Harmful Algal Blooms (HAB s), can cause health risks to humans and animals

26 Drinking Water Facility Issues United States Environmental Protection Agency placed Cyanobacteria on its Drinking Water Contaminant Candidate List Currently listed as an Unregulated Contaminant HAB s in drinking water facilities can cause: Public health risks Foul taste and smell Clogged filters Unsafe conditions for recreational use Potential death of stock and wildlife Foul smell and unpleasant appearance Fish kills

27 Blue-Green Algae Sensor by Turner Designs Available as an option on the Hydrolab DataSonde 4a or DataSonde 4X Note: Detecting Blue-Green Algae requires special optics for marine water both marine and freshwater option is available today Optical Characteristics Light Source: Light Emitting Diode Detector: Photodiode Excitation Wavelength: 590nm Emission Wavelength: 650nm

28 Monitoring should include: 1. Field observations for planktonic algae blooms, attached algae biomass, filter head loss, etc. 2. Taste and odor monitoring at the treatment plant and distribution system by simple T&O tests, FPA tests (flavor profile analyses), TON tests (threshold odor number), also using the more expensive GC analyses for odor compounds such as geosmin and other parameters. 3. Routine algae sampling with microscopic analysis for cell counts and species identification.

29 Intense Summer Stratification at a Water Intake

30 End of Hydrolab/OTT Water Quality Monitoring Presentation Questions?