Watershed Map
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Equipment Research
GPS surveying vs. Total Station surveying Used in designing restoration and conservation projects in the Octoraro watershed GPS Gives a position within seconds Necessary to have clear open sky without physical barriers for signal to connect with satellites Do not need to reference to any other location to record position Can be used anytime of the day, even at night Only requires one individual to operate and simple to record observations Control points are able to be placed offsite so it will not be disturbed by site activities Calibration can be done by the operator at any moment An expensive tool at first, though lower cost in maintenance Easier setup with only having to turn on the instrument and it is guided to the position on the screen Has no moving parts such as leveling devices that can be knocked out of adjustment Total Station Must be oriented to a known point of reference before continuing to observe another reference...
The Octoraro
The Octoraro creek watershed spans over 208 square miles in southern Lancaster and Chester counties in Pennsylvania, as well as Cecil county Maryland. It is in Cecil where the mouth of the creek empties into the Susquehanna river, a tributary of the Chesapeake Bay.
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