Measurements of apparent electrical conductivity and water content using a resistivity meter


Bozkurt A., KURTULUŞ C. , Endes H.

INTERNATIONAL JOURNAL OF THE PHYSICAL SCIENCES, cilt.4, ss.784-795, 2009 (SCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 4 Konu: 12
  • Basım Tarihi: 2009
  • Dergi Adı: INTERNATIONAL JOURNAL OF THE PHYSICAL SCIENCES
  • Sayfa Sayıları: ss.784-795

Özet

Measurement of soil water content (Wn), a major interest in many disciplines which requires collection, analysis and interpretation of soil data, may be expensive and time consuming. One way to reduce the cost of it is to measure the soil apparent conductivity (ECa) and to correlate with soil volumetric water content. However, the influences of soil properties such as salinity, porosity, structure, pH and clay content might be significant effect on ECa variation. Therefore, to understand the influence of different properties on the ECa, we studied the relationships between ECa and Wn, with respect to salinity, porosity, pH, and clay content in two engineered covers located in the Umuttepe and Alikahya Regions. Soil ECa measurements were conducted at 142 points in the Umuttepe and 260 points in the Alikahya engineered covers in September 25 and 27, 2007. At the same time soil samples were collected to a depth of 0.3 m from each site of measuring points in both engineered covers to determine the soil properties. pH values were measured at each of the measuring point in-situ. Soil ECa readings were correlated with Wn, salinity, porosity, pH, and clay content. Regression analysis yielded R-2 values of 0.811 and 0.819 for Wn versus ECa for the Umuttepe and Alikahya engineered covers, respectively. Weak relationships were determined for ECa and salinity (R-2=0.008 for Umuttepe, and 0.0168 for Alikahya), porosity (R-2=0.0016 for Umuttepe, and 0.0087 for Alikahya), pH (R-2=0.0403 for Umuttepe, and 0.0051 for Alikahya) and for clay content (R-2=0.1211 for Umuttepe, and 0.0465 for Alikahya).