Mapping Hidden Channels with Genesis Live

River channel thalwegs (the line of lowest elevation within a valley or watercourse) are often dynamic, and sometimes hidden features of large river systems.  Especially low slope or impounded systems.  The thalweg is a critical geomorphological feature of river and reservoir systems and affects everything from sediment transport, to fisheries habitat, to algae or invasive plant control.

Thus a good bathymetric contour map is a necessary pre-requisite for effective river and reservoir management.  Here, we walk you through how to use new real time technologies (C-MAP’s Genesis Live) to produce smooth, precise, and accurate maps of hidden river thalwegs all within one trip to the site and with automated post-processing with BioBase’s EcoSound.  We’ll use an annotated image gallery to take you through this process.

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Utilization of a Web-Based Mapping Interface to Enhance Inland Fisheries Management Strategies in Texas

A. Adams, M. De Jesus, G. Cummings, and M. Farooqi

Texas Parks and Wildlife Department, Inland Fisheries

 

Abstract:

Texas Parks and Wildlife Department Inland Fisheries (TPWD IF) biologists traditionally use “stand-alone” mapping interfaces to generate 2-dimensional (2-D) aerial outputs of fish habitat and benthic surveys of aquatic systems. Preliminary work has shown promise in the use of a different method, which generates interactive 3-dimensional (3-D) high-definition (HD) outputs. During field surveys, a Lowrance© Elite 9Ti GPS unit with TotalScan™ transducer was used to generate data points along boat transects on waterbodies of interest. A waterbody “Vegetation Analysis Report” and HD maps were then generated from these data using web-based mapping algorithms through BioBase©, and ArcMap 10.3© GIS software. Aquatic vegetation biovolume, bathymetric mapping, and benthic substrate composition outputs, produced by BioBase© aided biologists in selecting best management strategies, regarding aquatic vegetation management and angler access development at three central Texas impoundments. This tool can prove valuable to fisheries managers needing a higher resolution of survey results to fine-tune management strategies. At a cost of $2,5001 US for a yearlong subscription, cost-benefit would have to be assessed by individual users, based on their needs.

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BioBase is now Metric compatible!

Ok. It’s long overdue. But, better late than never! Much to the delight of non-US users, now you can choose whether BioBase EcoSound outputs are in metric or imperial units.

AccountPage_Screenshot
Click on “My Account” to select the desired units.
ShobyLake
Metric output contoured in 0.5 m intervals. Contour detail is autodecluttered based on your zoom level in BioBase.

Wish to change units of an already processed map?

If you processed a trip with one unit setting and wish to recontour the map in a different unit, simply change the unit in our Account Profile and then go back to the trip of interest and reprocess

TripReprocessing
After selecting a new unit, reprocess the map to contour in the new units