Res 1984-074 - Laserfiche WebLink

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-2- LENGTH OF STUDY August 15, 1984 to December 31, 1984. OBJECTIVES The primary goal of this study is to produce a series of overlaying maps that can be used for planning purposes to minimize the impact of develop~ent on the Edwards Limestone Aquifer. In addition, information on local groundvlater flow as interpreted from dye traces, well water chemistry, and changes in water chemistry of the Springs and area wells will be discussed. The follol'ling is a list of specific maps to be made and additional objec ti ves: 1. Produce a photo-lineament/fracture map of the study area. 2. Produce a map showing the location of wells. 3. Produce a water table map. This can be used to show the depth to water at sites of interest. 4. Produce a map showing the locations of caves, sinkholes, and minor and major stream pathways that can act as recharge points. 5. Produce a map showing thickness of cover over the Edwards. 6. Produce a detailed geology map from published data. 7. Produce a map outlining the first order basins that empty into Purgatory and Sink creeks. 8. Perform a couple of dye traces to better define ground water flow paths. 9. Discuss the implications of spring and well water chemistry on ground water occurrence and movement. METHODS The following is a brief description of the method to be utilized for preparing the maps listed in the objectives: 1. Photo-lineament/Fracture map Black and white, 1;24,000 scale, aerial photographs will be used for defining large karst feòtures (ex. sinkholes, caves, and open fractures), and various types of topographic and color tone alignments that could represent fractures that act as recharge points and avenues of groundwater movement. 2. Well Location Map A door-to-door survey and well driller's logs will be used to gather as many well locations as possible within the time-limitation of the proposed study period.