Abstract
Studies of surface water and shallow groundwater hydrology require intensive replicated measurements of waterlevels, preferably in computerready digital form. Commercial digital stage recorders are expensive, which prompted thedesign and construction of an inexpensive, automatic, digital canal stage recorder with offtheshelf materials. This devicefits into a PVC pipe used as a stilling well, making a sturdy design and very simple installation and maintenance. Stepbystepinstructions on the recorder construction are presented as well as design considerations to fit a particular application. Thefield performance of the stage recorder was assessed in a canal in South Florida. Continuous water level readings werecompared with those readings obtained at a stage recording station maintained by the South Florida Water ManagementDistrict. Results obtained during the experimental period of 4.5 months showed good agreement between these twoinstruments (R21:1 = 0.996 and y = 0.9524x + 0.048; R2 = 0.998) and a measurement resolution of 0.63 cm when using an8bit data logger. The simple canal stage recorder could be adapted for measuring water levels in shallow wells, lakes, andtidal lagoons.
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