Determination of geoelectrical and saturated zones by using electrical resistivity method between Samara and Al-Dour- central Iraq

Abstract

AbstractIn this paper, the Geoelectrical and saturated zones for the area between AL-Dour city and Samara city in the central of Iraq were determined and studied.The data related to this area were survived by AL-Furat general company for studies and design for irrigation projects.The electrical resistivity (Shlumberger array) survey includes two profiles contained (13) VES points.The researcher draw the field curves and reinterpreted the data by use tow methods, qualitative (curve type) and quantitative by use partial matching (auxiliary point method) interpretation methods.In the first method three types of VES curves were recognized (HKQ, QQ, KQ).While in the second method the thickness and the resistivity of the geoelectrical zones were computed.By using the second method results, the geoelectrical sections were drawn; with the help of information of two wells in the area, the geological sections were drawn too.As a result , four zones were determined under the surface(surface soil its resistivity between(53-690) Ω.m , its thickness between(1-2.5)m,the unsaturated zone was classified into upper part its resistivity between(40-80) Ω.m and lower part its resistivity between(70-500) Ω.m, its total thickness between(6-18)m, saturated zone its resistivity between(7-15) Ω.m , its thickness between(39-72)m ,and the last zone was impermeable bed , its resistivity between(1.1-3.5) Ω.m , its thickness unknown