TY - JOUR
T1 - Assessment of the Aljarafe Model Performance in the Estimation of Soil Optimum Moisture for Tillage and Plasticity Index
TT - ارزیابی کارایی مدل الخلافه در تخمین رطوبت بهینه خاکورزی و شاخص خمیرایی خاک
JF - JSTNAR
JO - JSTNAR
VL - 24
IS - 1
UR - http://jstnar.iut.ac.ir/article-1-3718-en.html
Y1 - 2020
SP - 159
EP - 168
KW - Cation Exchange Capacity
KW - Clay
KW - Engineering properties
KW - Organic matter
N2 - The soil engineering evaluation can be useful for construction and soil use. Aljarafe model has been used to evaluate the soil engineering properties by multiple regression techniques. In this research, Aljarafe model was used to predict the optimum moisture and plasticity index based on 184 series soils data of the Miandoab region. Based on all correlations between clay percentage and plasticity index, the optimum moisture proved to be highly significant (0.88 & 0.72). Also, Cation Exchange Capacity was significantly correlated (0.84 & 0.70) with the engineering properties. However, the correlation coefficients for the organic matter with optimum moisture and plasticity index were very low in the absolute amount. Application of the aljarafe model revealed that 50.3, 5.7, 0 and 44 % of the total extension could be classified as low, moderate and very high, respectively; on the other hand, based on the experiment data, 46, 13, 6 and 35 % could be classified as low, moderate, high and very high plasticity index classes, respectively. So, there was an overall agreement between the aljarafe model and Analytical Plasticity index maps, which was 80.4. Also, the coefficient of Determination, Root Mean Square Error (RMSE), Nash-Sutcliffe index (NES) and Geometric Mean Error Ratio (GMER) between calculated and experiment engendering properties was calculated to be 0.767, 9.3, 0.671 and 0.86 for the plasticity index and 0.739, 14.5, 0.543 and 0.73 for optimum moisture, respectively, were significant (P>5%). Finally, the aljarafe model provided a reliable estimate of engineering properties.
M3 10.47176/jwss.24.1.30662
ER -