Natural Resources and Environmental Sciences Lake Fort Scott Bathymetric Survey Spring 2006 Natural Resources and Environmental Sciences Kansas State University Kevin Bergman Kyle Fitzgerald Jud Gladin Jennifer Hancock Tyler Pjesky Natural Resources and Environmental Sciences

Outline Introduction –Purpose –Background Information –Bathymetric Survey Process and Approach –Contacts and Resources –Training –Conducting Survey Analysis –Assumptions –Volume Calculations Conclusions

Natural Resources and Environmental Sciences Purpose Develop Map of Lake Bottom Estimate Lake’s Storage Capacity Determine Sedimentation Rate Lake Fort Scott.

Natural Resources and Environmental Sciences Background Information Lake Fort Scott constructed in 1958 to augment water supply Original capacity of 2.1 billion gallons or 6485 acre-feet. Water occasionally used from lake during dry years to maintain sufficient quality drinking water for city. Land use within watershed is primarily production agriculture (grassland) Shoreline property has been sub-divided into 141 lots for part-time and permanent year round residential housing

Natural Resources and Environmental Sciences Bathymetric Survey Bathymetric Survey: A survey of the bottom surface of a water body to produce a topographic map. Uses –Estimating water volumes –Mapping bottom surfaces of water bodies for exploration

Natural Resources and Environmental Sciences Single Beam Echo Sounder A single-beam echo sounder produces soundings by transmitting short pulses of acoustic energy down towards the lakebed and detecting those pulses reflected. The depth under the vessel is then calculated from the 2-way travel time of pulses and the mean speed of sound over the water column Image taken from pao.cnmoc.navy.mil/…/ indexunderwater.htm

Natural Resources and Environmental Sciences Making Contacts and Acquiring Resources Kansas USGS Lawrence, KS Hypack Inc. Middletown, CT –Develops software for marine surveys –Agreed to loan software for one month at no charge, $6,500 value Odum Hydrographic Systems Inc. Baton Rouge, LA –Agreed to loan equipment at no charge –One day of training at no charge, $10,000 - $15,000 value

Natural Resources and Environmental Sciences Training Training in Baton Rouge, Louisiana Odom Hydrographic Systems Incorporated Detailed explanation of the survey process Hands-on-training on Mississippi River Hydrotrac HT100 single beam echo sounder Hypack bathymetric survey software

Natural Resources and Environmental Sciences Conducting Survey Equipment Requirements: –Boat 2000 Lund 1800 Fisherman –Power Source Generac 5550 Watt/8550 surge generator –Survey Equipment Hydrotrac HT100 single beam echo sounder GPS receiver –Analytical Software Hypack –Laptop Dell Inspiron 300m –Calibration Device 8 pound anchor

Natural Resources and Environmental Sciences Conducting Survey Preparation –Attach the transducer –Mount GPS receiver

Natural Resources and Environmental Sciences Conducting Survey Calibration –Building a calibrating device

Natural Resources and Environmental Sciences Conducting Survey Dam NORTH

Natural Resources and Environmental Sciences Conducting Survey Dam Location Cross Section Lines Boundary Line

Natural Resources and Environmental Sciences Analysis Assumptions Volume Calculations –Hypack –Notepad –Microsoft Excel –AutoCAD Land Desktop Map and Volume

Natural Resources and Environmental Sciences Assumptions Minimum depth 2’ Lake perimeter adjusted –Lake aerial image –Lake floor

Natural Resources and Environmental Sciences Volume Calculations Hypack Notepad Microsoft Excel AutoCAD Land Desktop

Natural Resources and Environmental Sciences Results ,485 acre feet 5,980 acre feet 505 acre feet of sedimentation 7.8% capacity loss acre feet per year 0.16% capacity loss per year

Natural Resources and Environmental Sciences Conclusions The sedimentation rate of the lake may not be the major concern with quality water supply to the city. Adjacent land use may require better regulation. Rate is based on two points of data over 50 years apart which does not give an accurate indication of lake conditions.

Natural Resources and Environmental Sciences Alternative Surveying Techniques Hardware Alternatives Multi-beam Echo-sounder Fishfinder/Depth finder Manual depth recordings Software Alternatives Hypack (for analysis and modeling) Trimble HYDROpro TM

Natural Resources and Environmental Sciences Service Learning Goals Contribution to Community Professional Development

Natural Resources and Environmental Sciences Cost Comparison Project budget: $2000 Project expenses: $1500 –Software donated by Hypack Inc (actual cost = $6500) –Equipment donated by OHSI (actual rental cost = $95/day + shipping, etc) –Training donated by OHSI (actual cost = $800/day) –Personnel hours donated (actual consulting cost = $150/hr) Cost to hire a professional consultant to perform a similar survey: approximately $20,000 Cost to City of Fort Scott –2 nights at Best Western Learning Experience = Priceless

Natural Resources and Environmental Sciences Acknowledgments City of Fort Scott Kansas Department of Health and Environment WaterLINK Odom Hydrographic Systems Inc. Hypack Inc. Questions?