Vaisala WXT520 Released Beach Advisories And/Or Restrictions to Swimming
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EnvironmentalMONITOR A quarterly newsletter with emphasis on environmental products & applications. Fall 2008 Monitoring Lake Erie Beaches What’s Inside The Regional Science Consortium in Erie, Pennsylvania recently added a NexSens MB-300 Water Quality Data »Water Column Profiling Buoy to their real-time monitoring network. Housed within the data buoy is a YSI 6920 V2-2 multi-parameter »Fish Kills Initiate water quality sonde that samples for temperature, Monitoring at Ford Lake conductivity, pH, dissolved oxygen, and turbidity. The real-time water quality buoy is a valuable supplement »WQMobile: Mobile for researchers, as they had previously been collecting Workforce Solution manual grab samples to test for these parameters. The weather and water quality data collected from the »TDS Nomad NexSens data logging radio network is used to augment a predictive model for the determination of E. coli »New Preferred Rental contamination on the beaches of Lake Erie at Presque Program Isle State Park. It is part of a complex system that provides information for making decisions regarding »Vaisala WXT520 Released beach advisories and/or restrictions to swimming. For more information or to view real-time data, visit: Water quality & weather data is transmitted »Nationwide Events http://v4.wqdata.com/webdblink/trec.php. to the Tom Ridge Center via radio telemetry. EnvironmentalMONITOR Fall 2008 Water Column Profiling Build a cost-effective, vertical water quality profiling system for lakes and reservoirs. Telemetry sensors are connected and suspended at user-defined The first step in building a water column profiling system distances along the string. Additional water quality is to decide how the data will be sent back to shore. Two measurement sensors, including single-parameter factors help determine the best telemetry method: sensors and multi-parameter sondes, can be connected site conditions and distance to a base computer. along the string using cable splitters. sensorBUS When the project computer can be located within includes three industry-standard, digital interfaces a few miles (line-of-site) or few hundred feet (1-wire temp string, RS-485 multi-drop and SDI-12) (non-line-of-site), license-free spread spectrum along with both 12 and 5 VDC power for connecting radio telemetry, such as the NexSens 4100-SDL additional water quality measurement sensors along Radio Data Logger and 4100-Base Radio, the water column. is the best choice. When the buoy is remotely located relative to the project Cables & Connectors computer, cellular telemetry The field-rugged, watertight becomes the best option. connector/cable system is The NexSens 3100-SDL designed for harsh environments Cellular Data Logger and submersible (fresh, is easily configured for brackish, or salt water) various cellular providers applications. The cable is and supports GSM/GPRS, constructed of (8) 22 AWG CDMA, EV-DO, iDEN, and wires, including a shielded EDGE technologies on twisted pair for RS-485 signals, all major cellular service an overall shield, and a heavy- provider networks such as wall, UV-stabilized, polyurethane Verizon, Cingular/AT&T, and jacket. Connectorized cable ends Sprint/Nextel. include a flexible strain-relief and either a plug or receptacle Data Buoy fitting. Double o-rings (both gland The MB-300 buoy platform is ideal and face seals) ensure a reliable and for deploying temperature strings, water-tight connection. Mated connectors multi-parameter sondes, and other are rated at 200 meters of submersion. Cables monitoring instruments in small reservoirs, are interchangeable and can be connected in series lakes, rivers, streams, and protected coastal to extend lengths as needed. A complete set of waters. At the heart of a multi-point water accessories are available for termination, junction, and quality buoy is a battery-operated, solar-charged signal splitting. SDL (Submersible Data Logger). Designed for floodplain, lake, sea or river bottom, subsurface, Mooring & Deployment and wave-zone deployments, the SDL offers data When setting up a mooring & deployment system to logging for extreme, environmental monitoring hold the MB-300 buoy in place, a heavy bottom chain applications. The system offers all of the standard is required to set and hold the anchor properly, create iSIC features in a submersible housing with field- a catenary curve, and absorb shock. Stainless steel rugged, watertight connectors. When configured bow shackles securely connect mooring chain to both with radio or cellular telemetry, antennas are the data buoy and anchors. Cast iron or steel pyramid housed within the protective locking cap and mooring anchors are recommended for sufficient built with rugged SDL cables and connectors to holding power. To suspend the water quality sensors withstand harsh environments. along the vertical water column, vinyl-coated, stainless steel wire rope can be used to build custom mooring Sensors lines. The NexSens T-Clamp mooring clamp is designed On floating buoy applications, the water quality to securely attach a string of connectorized T-Node measurement sensors are suspended at multiple temperature sensors along such a mooring line in buoy- points along a sensorBUS string. For temperature-only based applications. Mooring clamps are also available for measurements, NexSens T-Node water temperature single-parameter sensors and multi-parameter sondes. 2 Fish Kills Initiate Monitoring at Ford Lake Water quality buoys are used to develop a corrective-action, algae management plan. Located along the Huron River near Detroit Michigan, continuously measure DO levels at five-minute sampling Ford Lake is one of the largest impoundments on the intervals. The ROX Optical DO sensor features a self- Huron and has been used for hydroelectric power cleaning wiper that is ideal for long-term deployments. purposes since 1932. The Ford Lake Dam was originally A NexSens T-Node water temperature string collects constructed by Henry Ford, who was an expert on data from these sondes, along with other T-Node hydroelectric power generation. The dam is currently temperature nodes, to obtain a complete vertical water owned and operated by Charter Township of Ypsilanti, quality profile. and it is still used for generating and selling electricity. University of Michigan researchers also chose to During late summer months, Ford Lake experiences integrate existing Turner Cyclops-7 and SCUFA massive algae growth, causing localized fish kills and submersible fluorometers into the system for measuring foul odor. As a result, the Lake has been the site of a chlorophyll, turbidity, and phycocyanin (blue-green research study sponsored by the US EPA (2003-2006) pigment). NexSens Technology created a connectorized and also by the USDA since 2006. The study, led by sensor cable with a UW Underwater Connector, making Professor John Lehman of the University of Michigan, integration to the buoy plug-and-play. probes the causes and possible corrective measures for the nuisance algal blooms that plague Ford Lake. Housed within each buoy, a NexSens 4100-SDL radio telemetry data logger in a submersible enclosure Researchers have developed a management plan that collects data from the instruments. Data is transmitted will be tested through lake experiments from 2006 via wireless spread spectrum radio telemetry to the to 2009. To complement and help automate these Hydroelectric Plant’s rooftop. Also mounted on the roof experiments, the Charter Township of Ypsilanti recently is a Vaisala WXT510 multi-parameter weather sensor. deployed two real-time dissolved oxygen monitoring This highly accurate sensor features no moving parts buoys along with a multi-parameter weather station. and simultaneously measures wind speed & direction, liquid precipitation, air temperature, relative humidity, The multi-point dissolved oxygen monitoring buoys and barometric pressure. are deployed at two locations near the Dam, both in Ford Lake and downstream of the Huron River. By making this data available to all interested parties via Researchers selected the NexSens MB-300 Monitoring the NexSens WQData web datacenter, researchers can Buoy, a 30-inch diameter, polymer-coated, foam-hull investigate the interactions of weather conditions and buoy with 300 lb. buoyancy. This compact buoy is river water quality in real-time. Researchers are also easily deployable and is ideal for deploying monitoring using this real-time data to develop complex computer instruments in small reservoirs, lakes, rivers, streams, animations that show the changing temperature, and protected coastal waters. oxygen, and pigments in 3D. Moving forward, Dr. Lehman and his group hope to develop new theories YSI 600OMS V2 optical monitoring sondes with ROX that can guide future lake management efforts both on Optical Dissolved Oxygen sensors were chosen to the Huron River and nationwide. 3 EnvironmentalMONITOR Fall 2008 WQMobile Mobile Workforce Solution NexSens WQMobile Software is a revolutionary new software program for Windows Mobile 6 Devices. Designed for use on rugged handheld computers such as the TDS Nomad, WQMobile is an all-in-one mobile software solution for environmental professionals. The versatile software can log time & date stamped water quality data, field notes, and site photos with geo-referenced location information. Rugged Handheld Computer The TDS Nomad is the most powerful and full- featured rugged handheld computer available. All Nomad models feature an 806 MHz processor with Windows Mobile 6.0 Software, a long-