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http://dx.doi.org/10.11108/kagis.2019.22.3.037

The Analysis of Soil Salinity in Saemangeum Agricultural Land using Spatial Analysis Method  

KIM, Young-Joo (Dept. of Cadastre and Civil Engineering, Vision University of Jeonju)
LEE, Geun-Sang (Dept. of Cadastre and Civil Engineering, Vision University of Jeonju)
Publication Information
Journal of the Korean Association of Geographic Information Studies / v.22, no.3, 2019 , pp. 37-50 More about this Journal
Abstract
In this study, we analyzed the soil salinity of Saemangeum agricultural land using GIS spatial interpolation method. Dominant soils series of experimental sites were Munpo (coarseloamy, mixed, non-acid, mesic, typically fluvaquents), which was based on the fluvio-marine deposit. Soil samples were periodically collected at 0~20cm and 20~40cm layer from each site. First, the distribution characteristics of EC, ESP, and SAR according to spatial interpolation were analyzed using 142 sample points. Through the error analysis of 143 validation points, the IDW method for EC and SAR, and the Kriging interpolation method for ESP were selected as the optimal interpolation method. Using the optimal interpolation method, the characteristics of EC, ESP, and SAR were analyzed for the change of soil salinity from 2014 to 2016. As a result, EC, ESP and SAR were decreased by 0.26mg/L, 5.97mg/L and 0.73mg/L respectively due to the dilution effect caused by rainfall.
Keywords
Spatial Interpolation; Error Analysis; Soil Salinity; Dilution effect;
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