Consumer Sonar for Bottom Mapping: Updated Reference List

Another FAQ we get is wondering if there are published studies using BioBase technology? There are many legacy applications on which the BioBase technology is based. Further, now that a sufficient passage of years has accumulated to support the “research to publication” cycle, we’re happy to share several BioBase-specific studies published in the peer-reviewed literature.  This is far from an exhaustive list and we’ve intentionally left out the niche growth in consumer side-scan technology for creating habitat maps.  If there are good published papers you know of that are not on this list, please share in the comments.

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FAQ of the year: Does BioBase EcoSound Map Sediment Depth?

Thanks to advances in physical, chemical and biological technologies and funding that are focused on reducing sedimentation or muck depth in waterways, many water resource practitioners are eager to determine how much sediment is in a waterway of interest and how much could be removed. As such, we frequently are asked: “Will BioBase tell you how deep the sediment is?”

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Minnesota LGU Taking Citizen Aquatic Plant Monitoring to New Level!

At conferences, we often encounter curious coordinators of citizen monitoring programs about how they could use automated consumer technologies to monitor aquatic habitats.  When they learn what BioBase does, a frequent question is: “That sounds pretty cool and something we could certainly apply, who else is using BioBase for citizen science applications?”

In response, we always highlight the Prior Lake Spring Lake Watershed District (PLSLWD) in Minnesota USA.  PLSLWD is a leader when it comes to leveraging the talents of volunteers, partners, and Lowrance and BioBase technology to implement a comprehensive, standardized aquatic plant monitoring program.  To learn more about the PLSLWD’s program and implementation strategies, check out this report.

Schematic showing the collection of merged files collected by citizen volunteers.  A PLSLWD intern coordinated efforts across multiple volunteers, informed citizens about desired travel routes, and even preloaded transect guides in their Lowrance Chartplotter for citizens to follow.

 

 

Maps of Bottom Hardness (top), Bathymetry (middle), and Aquatic Vegetation Abundance (% of water column filled with vegetation or biovolume, Bottom) collected by citizens on Prior Lake with Lowrance Sounders/Chartplotters and processed automatically by BioBase Automated Lake Mapping System.

 

BioBase EcoSound does Seagrass, Kelp, and Tides Too!

Although BioBase EcoSound was originally developed for aquatic vegetation mapping in inland lakes, users along both US Coasts have helped us diversify its toolbox to now be a powerful coastal habitat mapping tool as well!

One of the biggest challenges of mapping coastal habitats is their tidal influence with depths changing harmonically based on the moon phase and other factors.  Fortunately, however, widespread tide stations and large public databases of tide predictions allow for accurate and precise offsets to georeferenced and time-stamped sonar logs from Lowrance HDS or Elite units uploaded to BioBase EcoSound.  BioBase EcoSound immediately queries the nearest tide station to your upload (up to 75 km) and adjusts your depth and seagrass or kelp biovolume to the Mean Lower Low Water (MLLW) datum every 5 minutes.  Tidal statistics (Avg., start, stop, high, low,) are archived in your account for each trip.

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How BioBase is Helping Fish Conservation

BioBase EcoSound is helping State Fisheries Departments and Research Institutions across the US and UK to better manage Fisheries by providing important information about fish habitat.  See below for a short description of these ongoing investigations.Precision bathymetric mapping to estimate concentrations of a fish toxin (rotenone) to kill invasive fish in a Nebraska backwater lake. … Continue reading “How BioBase is Helping Fish Conservation”

BioBase EcoSound is helping State Fisheries Departments and Research Institutions across the US and UK to better manage Fisheries by providing important information about fish habitat.  See below for a short description of these ongoing investigations.

Continue reading “How BioBase is Helping Fish Conservation”

BioBase Project Propels Jeff Schuckman to Nebraska Game and Parks Employee of the Year!

Lake Yankton, a 332-acre backwater lake on the Nebraska/South Dakota border had a problem. In the summer of 2011, the Missouri River flooded, spilling into the lake a number of undesirable invasive rough fish, including large numbers of carp (silver, bighead, grass, and common), smallmouth buffalo, and gizzard shad. Notorious for stirring up lake bottoms while feeding and spawning — and for overeating zooplankton and aquatic plants — these species degrade water quality and fisheries.  

Overrun by these invasive species, Lake Yankton soon looked like chocolate milk, with a water clarity of only three inches — that’s right, inches, not feet.  So the cavalry was called in to assess the situation and provide a solution. Leading the effort was Nebraska Game and Parks Commission District Fisheries Manager Jeff Schuckman.

Fortunately for Nebraska anglers, this wasn’t Schuckman’s first rodeo. He knew the lake could be rehabilitated with careful application of Rotenone, a common fish-killing chemical. The challenge would be to determine just how much of the chemical was needed, and then purchase and apply just enough to do the job — no more, no less.

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BioBase Helps Manage Honeoye Lake Macrophyte Harvesting Program

Guest Blog By Terry R. Gronwall, Chairman of the Honeoye Lake Watershed Task Force (Honeoye, NY)
Honeoye Lake is one of the smaller (~1,800 acres) Finger Lakes in Upstate New York.  We have been managing our macrophyte population by using a harvester for about 25 years.  The objective of our harvesting program is to both provide relief for the recreational lake users and to remove biomass containing phosphorus from the lake every summer.  We average around 800 wet tons of biomass removed per season.

When we learned about ciBiobase we saw this service as a way to make our macrophyte harvesting operation more efficient by concentrating our efforts on areas in the lake that have macrophytes growing through most of the water column.  This is shown as the red zone on our macrophyte maps.  We plan to monitor our actual harvesting rates relative to our macrophyte maps over the summer harvesting season to see if we achieve our goal of increased productivity.

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BioBase 3 Step Process: Important Details!

A primary strength of BioBase EcoSound is its simplicity and that is reflected in the easy 3 step process of “Collect,” “Upload,” and “Analyze” (Figure 1).

Figure 1. The core process of EcoSound depicting the 3 Steps of “Collect,” “Upload,” and “Analyze.”

But there are many strategies that users can employ that will ensure that they will get the best EcoSound outputs possible.  We’ll focus on several questions under each of the three categories

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CHIRP from a bottom mapping perspective

Maybe you’ve been hearing about this term in sonar circles called “Chirp” and noticing that most consumer sonar units now come with Chirp capability. Indeed, Chirp is a game changer for more precise definition of acoustic targets suspended from bottom (e.g., fish) and the technology is helping more anglers find fish in a wide range of aquatic environments (Figure 1).  But what does Chirp mean for mapping the bottom of waterbodies?  Does it provide any advantages or disadvantages over traditional 200 kHz frequency broadband sonar that is the foundation of Insight Genesis and BioBase
EcoSound mapping services?  Here we take a brief look at Chirp, explain what it is, and present some findings from preliminary tests in a couple of different lake environments.

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Offset Tool and Public Water Databases to Create Accurate Depth Maps

One of the best features of BioBase EcoSound and its sister technology for anglers, C-MAP Genesis, is the ability to aggregate partial maps created over time into a complete map later.  The recent blog post on Ten Mile Lake in Minnesota, USA, details a notable example of the power of aggregation.  However, changing water levels over the course of time can impact the accuracy of aggregated maps if recorded water depths are not offset against a standard benchmark water elevation.

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