Akademik Veri Yönetim Sistemi
The 15 Th International Symposium On Environmental Pollution And its Impact On Life in The Mediterranean Region: Problems And Solutions, Bari, İtalya, 7 - 11 Ekim 2008, ss.62-63, (Özet Bildiri)
The objective was to (i) introduce the possible use of the electromagnetic induction device, EM38, in soil salinity determination and (ii) determine the severity and extent of soil salinity (ECe) in areas irrigated with Irrigation Return Flows (IRFs). The research was conducted in Yemisli Irrigation District, YID (7 110 ha) located in the southern part of Turkey. Four sets of in situ soil salinity readings (ECa) of EM38 device were recorded in March, June, July and early October, 2007 and in February, April, July and early September, 2008. The relationship between ECa and soil salinity, ECe, of composite soil samples for the root zone (0-1 m) and 0-2 m soil depth was found statistically significant. ECa data were firstly converted to ECe through using a calibration curve. Then, ECe data processed in GIS media and salinity maps were established by using inverse distance squared interpolation technique. It was determined that the deeper the soil layers, the higher the areal means of soil salinity. In the peak irrigation season, i.e. in July, mean soil salinity was the least -4.3 dS m in 2007 and 3.5 dS m-1 in 2008- in the rooting depth, indicating the leaching effect of IRFs although their quality is marginal. Contrary to the expectations, at the beginning of irrigation season, i.e. in March and April, areal coverage of the saline areas was determined over 66% and 46% in 2007 and 2008, respectively. Our conclusion was that EM38 device can be used efficiently to determine the extent and severity of soil salinity. It was deduced that although the amount of winter rains are high enough, it is not as effective as to wash out salts from the soil profile due to the inherently poor drainage outlet conditions.