Due to the dams and cold water, safety was a paramount issue for the field staff. Site reconnaissance was undertaken to review safety concerns/plans, launch points and crew accommodations for the anticipated eight to 10 days of fieldwork.
#Hypack 2015 better sounding software#
Prior to fieldwork (launching of Kingfisher), the Hypack software was loaded with old survey lines and also the pre-planned transect lines to travel for the entire extents.
Within the 10 km extent, the additional data included areas of 20 meter transects (sections), a 1 – 3 meter offset run from edge of water, running the thalweg (deepest points) and streamlines, and measuring some edge of water points separately from the boat. Hunt Surveys with the Kingfisher was to retrace those old survey lines (to determine the original quality or changes) and then densify and add to the data. The horizontal and vertical references were plotted with hard copy maps available at the time. GRCA had existing base survey lines, as were measured with a rod from a boat in approximately 1980. There had been some visible physical concerns of backed-up ice flows and flooding up-stream from the dam and there was a need to review actions and alternatives. The purpose of the bathymetric survey was to confirm and clarify possible sediment build-up at the dam and to enhance the hydraulic model for the river at the dam. The scope further included several tributaries with three other smaller dams. The project extents ranged 10 kilometers, noting that the river is over 0.5 kilometers wide at the Dunnville Dam. An engineering sub-consultant, KD2 Consulting, was also engaged by Hunt Surveys to assist in project management and final deliverables. was contracted by the Grand River Conservation Authority (GRCA) to provide a bathymetric survey of the Grand River at the Dunnville Dam. Areas of weak data coverage can be identified and re-measured at a time when it is easy to do so. Real-time xyz GPS map data allows the remote operator to drive Kingfisher exactly along the pre-planned routes, and to make the coverages required instantly. The Hypack bathymetry software on the operator’s laptop allows for pre-planning routes, density of coverages, and instant monitoring of the readings and their quality. The real-time xyz GPS data from the TopNET live network makes Kingfisher “live” to the on-shore, remote controller operator. The TopNET live network was also chosen for the extensive coverage in Ontario, including many remote locations of the bathymetric surveys. At the time of the Kingfisher build-out for Hunt Surveys, the selected Topcon and Sokkia GNSS hardware was chosen for the ease of integration into the custom Clearpath controller software, and with the bathymetry software by Hypack. Hunt Surveys Inc., an Ontario land surveyor firm, acquired Kingfisher from Clearpath Robotics in 2014, in order to expand into the growing bathymetric survey marketplace.
On shore, the survey data is received by the remote control operator in real time with the map and data view screens on a laptop. Kingfisher is loaded with survey-grade sonar, an inertial measurement unit, a remote controller Wi-Fi system, and survey-grade RTK GPS. Real-time, accurate, xyz positioning is crucial to most all aspects of surveying, and none more so than bathymetric surveying utilizing the state-of-the-art, remotely controlled, bathymetric survey boat technology, known as the unmanned surface vessel (USV) “Kingfisher.” Agriculture Smart Implements and Harvest.
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