TN614 : Modeling and interpretation of resistivity data and investigation of correlation between the interpretation results and qualitative parameters of groundwater in Bastam area
Thesis > Central Library of Shahrood University > Mining, Petroleum & Geophysics Engineering > MSc > 2016
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Abstarct: The importance of groundwater for human beings ever existed in the past. Today, reducing the reserves of this vital fluid in many parts of the world, its importance has doubled.
To obtain comprehensive information and useful groundwater geoelectrical methods for saving money and time over other methods are used.
In the field related to this project in Dasht-e Bastam, located in the city anymore 59 probing Geoelectric over 10 structures parallel to each other along the northwest-southeast of the arrangement Schlumberger and with a maximum length of transmitting electric current 1,000 meters to evaluate from the perspective of regional conditions different laxyers of groundwater and aquifer are geoelectrical profile.
In the first stage interpretation of this catheterization calc sheet resistivity manually with the help of the main curve (and small) and was standard. Then, with the help of computer software and IX1D IPI2WIN for the next one and then they form two-dimensional modeling software and ZONDRES2D been done RES2DINV. According to the results found that most of the profiles, resistivity decreases from the northwest to the southeast region. Also in further reducing the resistivity sounding vertically from top to bottom. The water level of wells in the mid portion of the study area near ground level (wells Cal flint on the profiles 3, level of water table 5/14 m, shafts Castle Baloch on profiles 5, the groundwater level is 8 meters and the well instrumental stamps groundwater level 9 meters on profiles 6). One goal of this thesis. Hydrochemical data on the correlation between resistivity of underground water is geoelectrical model and interpretations. So with hydro chemical data relating to the 20 wells that are substantially closer to the geoelectric sounding discharge are linear regression, correlation between resistivity data has been hydrochemical data. Hydrochemical data used include TDS (total dissolved solids), EC (electrical conductivity) and anions which contains So4 (sulfate), Cl (chloride), Hco3 (bicarbonate) and Co3 (carbonate) is present in groundwater wells. Software Excel relationship between these values were calculated by regression tools. Charts were both linear and logarithmic among these diagrams, graphs of logarithmic curve with a correlation coefficient larger in all cases been able to create a better fit for the relationship more and better hydro chemical parameters and resistivity laxyer is juicy. This means that the lixnk between hydro chemical parameters and the shape of the curve resistivity aquifer species.
Impact hydro chemical data on the resistivity at low levels of concentration, greater (too much slope of the curve) and the impact in large quantities because of the low slope of the curve is reduced. It can be said: When the concentration is too increased, the effects of the decrease in specific resistance is negligible.
Keywords:
#probing #resistivity #Bastam #hydro chemical data #the correlation coefficient Link
Keeping place: Central Library of Shahrood University
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Keeping place: Central Library of Shahrood University
Visitor: