Searching on Groundwater Using Geoelectric Method as Physics Application Learning Model

Getting a model of learning physics applications for high school students is not too difficult. Various applications in geophysical methods that apply basic science in physics can be applied. One of them is the geoelectric method. The geoelectric method is a geophysical method that works by injecting an electric current into the ground and measuring the potential difference, it creates. In the geoelectric method, there are many physics concepts, interrelationships between concepts and how to measure physical quantities contained in them unlike strong electric current, potential difference, and resistivity. The search for groundwater using the geoelectric method is one application of physics. The students here can measure the current directly, the potential difference and calculate the relation in the form of resistivity. This activity has been conducted at Sekolah Menengah Atas Bali Mandara Bali. First, given basic knowledge about electricity flow, then explained how electricity is applied in measurements on the earth. The activity continued with measurements on the schoolyard. The situation on the schoolyard is a leaky water pipe, there is a safety tank, there is a drill well being worked on. In this place, there are suspected groundwater reserves, which is why drilling is conducted. At the time towards training, drilling was conducted to a depth of 29 m. The results of drilling have not found water. The results of the geoelectric method measurement found that there was a pipe leak, safety tank, and groundwater reserves at a depth of 39 m. The verification is conducted with the students, it is true there is a leaky pipe (visible) and safety tank (visible). For drilling groundwater reserves have not found any water due to the position of the drilling with measurement results different from 3 m and not yet reached the estimated position of groundwater reserves. Giving found the results like this; it can be concluded that groundwater search activities using the geoelectric method can be used as a model of learning physics applications for high school students.