| The Dye Tracing Pages | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| The field survey for the Karst Hydrogeologic Inventory will be conducted under conditions ranging from moderate to high flow during a wet period such that the dominant
resurgence points are active. The survey will be conducted by walking or floating all streams and associated impoundments (lakes, ponds) in the study area to visually identify karst features including but not limited to: |
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| · Spring · Soil springs · Seeps · Sinkholes · Swallets · Karst windows · Sinking streams · Caves |
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| The features will be located on a 7.5-minute series topographic map. Each feature will be given a name and a unique inventory number. General information and physical
characteristics of the feature will be recorded on the Karst Feature Inventory Form. The physical characteristics of resurgence point water will include a measurement of the discharge volume and measurement of the discharge temperature, specific
conductance, and pH. The feature will be photographed to complete the inventory record. Precise vertical and horizontal locations of the key resurgence points and any features potentially indicating groundwater elevations will be surveyed. Elevations will be measured to the nearest 0.01 foot referenced to the National Geodetic Vertical Datum of 1929 or local datum as available. The equipment needed for the field survey includes the following: 1. Base maps and air photos for plotting features (7.5 minute topographic quadrangles) 2. Inventory forms 3. Meters for the measurement of temperature, pH, and specific conductivity 4. Decontamination kit 5. Camera for taking two photos of each spring and surface stream location (one from about 10-15 feet and one from about 100 feet) 6. Flagging to mark features for surveying and/or monitoring 7. A 200-foot tape measure for locating features and measuring stream reaches 8. Flow Probe, stream velocity meter, for taking a quick measurement of spring discharge. This is a current meter on a stick. We measure the spring velocity at one to three locations and measure the width and depth with a retractable carpenter's tape (it should not take more than 3 minutes to take this measurement). 9. Thigh-high rubber waders for walking streams |
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