The research about groundwater flow pattern in Perumnas Griya Bina Widya UNRI Tampan subdistrict of Pekanbaru have been done. Groundwater flow pattern mode from one dimension geoelectric data of Schlumberger electrode configuration. Based on formation of lithology resulted from geoelectric data, resulted four formation of lithology from block A to block G of the Perumnas. From the mapping resul…