Hidrología: investigaciones actuales

Subsurface Layers Modeling and Ground Water Studies in Kivi Plain by Geoelectric

Abstract

Behnam Taghavi, Farnusch Hajizadeh and Rana Khaleghi

Kivi Plainis located in the northeastern city of Kiviin Ardabil province. Due to the large number of villages in the desert and its people engaged in agriculture and animal husbandry, Study of ground water to determination of the optimal location of wells is important. In this regard, geoelectric technique was used for studies of groundwater quality and quantity of Kivi plain. In this research, the resolution of the subsurface layers, detection of saturated zone, determination of basement, detection of the general direction of groundwater and changes of resistivity in sounding points and profiles have been studied. The number of 196 vertical electrical sounding on nine profiles and the number of 9 sounding in variety points and in vicinity of exploratory wells by schlumberger array in the study area have been taken. "IPI2win" software is used for the interpretation of vertical electrical sounding curves and one-dimensional modeling. By “Res2dinv”, twodimensional modeling and preparation of resistivity section have been taken. According to the results of the interpretation of the data in the study area, sediments inparts of the Middle East and Northern have developed, and from the surface to the depth of alluvium and marl deposits were included. More aquifer layers in marly sand deposits, silt and sand, crushed limestone and salty zones were observed. Basement is included most of marl (with the layers of sandstone and conglomerate), limestone and silt. According to the basement, the topography slope of the area and isopiezecurves, groundwater movement is toward the northeast.