USING GEOPHYSICAL METHODS TO IDENTIFY SUBSURFACE WATER STORAGE AND DRAINAGE PATTERNS IN KARST TERRAIN
The seepage spring on the farm was dug out by recent farm owners for irrigation and livestock watering, leaving behind a small structure that allows a small volume of water to flow from a hill on the property. A set of two ER surveys was conducted above this spring with ER races running perpendicular to where the spring flowed from the hill. The goal of these surveys was to produce a 2D cross-section of the hill and to measure the degree of groundwater saturation in the area directly beneath and above the spring. This was done to measure the drainage area feeding the spring and locate other possible reservoirs of groundwater in the hill. Modeled cross sections of the subsurface geology depict a high degree of saturation in the hill at 23.8ft and 47.5ft deep, suggesting that multiple zones of saturation at varying depths exist. With the knowledge of an existing spring, it is possible to create another spring in the area, allowing water from this groundwater-saturated hill to be acquired. This project serves as an analogue for acquiring groundwater in the surrounding area and the preliminary data will be used in the future to locate other perched aquifers.