Tuesday, January 31, 2017

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.

Classic Literature
Duarte, C.M. 1987. Use of echosounder tracings to estimate the aboveground biomass of submerged plants in lakes. Canadian Journal of Fisheries and Aquatic Sciences 44: 732-735

Maceina, M and Shireman, J. 1980. The use of a recording fathometer for determination of distribution and biomass of Hydrilla. Journal of Aquatic Plant Management 18:34-39.

Maceina, M.J., Shireman, J.V., K.A. Langland, and D.E. Canfield Jr. 1984. Prediction of submerged plant biomass by use of a recording fathometer.  Journal of Aquatic PlantManagement 22: 35-38.

Stent, C.J. and Hanley, S. 1985. A recording echosounder for assessing submerged aquatic plant populations in shallow lakes. Aquatic Botany 21: 377-394

Thomas, G.L., Thiesfeld, S.L., Bonar, S.A., Crittenden, R.N., and Pauley, G.B. 1990. Estimation of submergent plant bed biovolume using acoustic range information. Canadian Journal of Fisheries and Aquatic Sciences 47: 805-812.

Recent Literature
Sánchez-Carnero, N., Rodríguez-Pérez, D., Couñago, E., Aceña, S., & Freire, J. 2012. Using vertical Sidescan Sonar as a tool for seagrass cartography. Estuarine, Coastal and Shelf Science 115: 334–344. http://doi.org/10.1016/j.ecss.2012.09.015

Meadows, GA 2013. A review of low cost underwater acoustic remote sensing for large freshwater systems. Journal of Great Lakes Research 39: 173-182. http://doi.org/10.1016/j.jglr.2013.02.003

Netherland, M. D., & Jones, K. D. 2015. A three-year evaluation of triclopyr for selective whole-bay management of Eurasian watermilfoil on Lake Minnetonka, Minnesota. Lake and Reservoir Management 31: 306–323. http://doi.org/10.1080/10402381.2015.1085114 BioBase Paper

Radomski, P., & Holbrook, B.V. 2015. A comparison of two hydroacoustic methods for estimating submerged macrophyte distribution and abundance : A cautionary note. Journal of Aquatic Plant Management 53: 151–159. BioBase Paper

Valley, R. D., Johnson, M. B., Dustin, D. L., Jones, K. D., Lauenstein, M. R., & Nawrocki, J. (2015). Combining hydroacoustic and point-intercept survey methods to assess aquatic plant species abundance patterns and community dominance. Journal of Aquatic Plant Management 53: 121–129. BioBase Paper

Winfield, I. J., van Rijn, J., & Valley, R. D. 2015. Hydroacoustic quantification and assessment of spawning grounds of a lake salmonid in a eutrophicated water body. Ecological Informatics, 30, 235–240. http://doi.org/10.1016/j.ecoinf.2015.05.009. BioBase Paper

Valley, R.D. 2016. Case Study Spatial and temporal variation of aquatic plant abundance : Quantifying change. Journal of Aquatic Plant Management 54: 95–101. BioBase Paper

Schooley, J.D. and B.C. Neely 2017. Estimation of paddlefish (Polyodon spathula Walbaum, 1792) spawning habitat availability with consumer-grade sonar. Journal of Applied Icthyology 00:1-9. https://doi.org/10.1111/jai.13565 . BioBase Paper

Friday, January 20, 2017

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?"

As much as we would like to say unequivocally "Yes!," and have an easy button solution, the reality is it's not that straightforward.  Off-the-shelf Lowrance transducers are designed to track the water sediment interface, especially at the standard 200 khz broadband frequency.  This blog discusses bottom tracking in a little more detail.  BioBase EcoSound algorithms do evaluate the acoustic reflectivity of bottom signal and will create a relative bottom hardness output.  Bottom hardness generally correlates with sediment depth but the relationship is variable depending on the system and we recommend users calibrate their bottom hardness outputs in their local system of interest.  The better approach in our opinion is knowing how deep the pond of interest should be and then comparing that to what the current conditions are to arrive at sediment depth.

Model Sediment Depth Based on Knowledge of the Desired Condition
Because BioBase EcoSound can produce a near real-time high-precision picture of current bathymetry, basic knowledge of the baseline/"as built" or desirable bathymetric design can be used to infer sediment depth and create highly precise, professional quality maps.  The Central Arizona Project's management of Arizona's primary aqueduct is probably the most widely cited example of this process.  Our optional GIS Services can take your BioBase EcoSound map and pre-treatment or baseline map and create a custom sediment depth map. See below for some great examples used by other lake management service providers.

Simulating sediment depth subtracting BioBase EcoSound-assessed bathymetry from "As Built" bathymetric design in a home owner association pond in CA. Work completed by Waterwork Industries, Windsor CA (http://www.waterworksindustries.com/).  BioBase GIS Services conducted the analysis and created the custom map

Post Dredging Bathymetric Assessment conducted by Ecoresource Solutions, Inc., Arvada CO (http://www.ecology.services/).  Mapped created by BioBase GIS Services.
Post Dredging Bathymetric Assessment conducted by Ecoresource Solutions, Inc., Arvada CO (http://www.ecology.services/).  Mapped created by BioBase GIS Services.
Contact us if you are interested in learning more about how we can help you map sediment depth.

Wednesday, January 4, 2017

Announcement: BioBase Under New Ownership

In late 2016 Navico - the parent company of BioBase - was acquired by Goldman Sachs Merchant Banking Division and Altor Fund IV.  Also in 2016, Goldman Sachs and Altor acquired an industry leading marine cartography and services company called Digital Marine Solutions (DMS), which promotes their products and services under the C-MAP brand (www.c-map.com).  As of January 2017, BioBase and related digital services will be transferring from Navico to DMS (operating under the C-MAP brand).  We are working now on a new organizational structure and product roadmap that will establish DMS as the preeminent marine charting and cloud data services provider across both recreation and commercial sectors.   "...alongside the C-MAP brand we will now have a cloud-based infrastructure and range of web and mobile applications for recreational markets, such as Insight Genesis and BioBase which provide differentiated and high-quality crowd-sourced mapping services that lead the competition," stated Paul Ostergaard, Digital Marine Solutions Chairman. BioBase customers can expect the same high-level of service and minimum disruption with this change. Over the long run, the move to DMS and strategic company investments will bring new high-value features to BioBase and establish it as the aquatic and marine industry standard for processing, visualizing, and analyzing spatial data.  BioBase feature development and technical sales and support will still operate out of the same Minneapolis office where it was born and we anticipate an even faster development cycle in the coming years.  We hope to announce some great features that are already in the pipeline under this new structure and resulting roadmap.  Please direct any questions about this transition to Ray Valley (ray.valley@c-map.com) or Matt Johnson (matt.johnson@c-map.com).