b'TECHNICHEADLINEAL TIPSSafe anD SounD It is also essential to consider the possible high waterWith these types of installations, its also vital to levels and velocities that may make a site unsafe forunderstand the overall depth of the water body. When sampling teams to enter at times. For a safe samplingdeploying a buoy, different depths and velocities require experience at all water levels, locations with bridgesdifferent mooring options to keep them safely in placeshould be considered, or engineering controls, such asand not all buoys can be moored the same way! a pulley system across a channel, should be installed to allow easy access.Large profiling systems can be mounted on a buoy or a platform. For these, it is also important to know Go With the FloWthe maximum water depth for the proper setup and programming of the instruments onboard. If the depth is Water quality instruments do not require a particularincorrectly set up for the site, you may end up collecting flow rate to collect meaningful data. However, somesediment data from the bottom of the water body rather velocity-based judgments should be considered. If anthan the valuable data you need. instrument is installed in an area of no-to-low flow, it could experience increased sedimentation and biological growth during long-term deployments. During spot sampling trips, if the velocity is too low, it may take an instrument an extended period to equilibrate to conditions, especially if the fluid that the sensors are transported and stored in is significantly different from the real water conditions. On the other handif sensors are used in an areaDepth:5mof turbulent flow, bubbles in the sample can causeTemp:23Cinterferences in your measurements, reflected as abrupt spikes in the data of varying degrees. Do your best to findDO:116% Sat15ma location that avoids this issue entirely.Chl a: 10.2 ug/LSINKERThis is an example of a single-point mooring data buoy.Buried sonde,Sonde exposed No ow to good owNo Velocity High Velocity AvoiD HeaDaches Large particles settle because velocity canLarge & small particlesSpend more time upfront to find an optimal monitoring no longer suspend them. May bury sonderemain suspended.pipe in continuous deployments. or sampling site location. Youll save yourself and your colleagues many headaches, and thank us later with just a Poor flow to sensors due to sediment build-up is an importantbit of reconnaissance work!consideration for long-term monitoring. We would love to hear more about your experiences selecting sites for your instrumentation. Please share your Larger Systemspictures and stories with us on Facebook and Twitter!Finally, many water quality instruments are deployed from buoys or on platforms. It is essential to keep the instruments away from marine traffic to prevent damage to the equipment or the vessels traversing the area. Buoys and platforms may need to be set up further to one side of@myYSI @YSIinca channel than the other to allow ships to pass by easily. For Customer Support Services:YSI.com/SupportWhos Minding the Planet? 57'