RT - Journal Article T1 - Preferential Flow Modeling Using Kinematic-Dispersive Wave Model and the Role of Macrospores JF - JSTNAR YR - 2019 JO - JSTNAR VO - 22 IS - 4 UR - http://jstnar.iut.ac.ir/article-1-3381-en.html SP - 129 EP - 142 K1 - Preferential flow K1 - Kinematic-dispersive wave model K1 - Soil drainage hydrographs K1 - Macrospores K1 - Mini rainfall simulator AB - Preferential flow is of great importance in the environment and the human health. So, rapid water transportation and consequently, pollutants and pesticides leak out and get into the groundwater, making it very difficult to measure and quantify. To quantify and describe the preferential flow, two gravity-driven models were used: 1) kinematic wave model (KW) introduced by Germann in 1985), and 2) kinematic dispersive wave (KDW) model developed by applying a second-order correction to the Germann’s model by Di Pietro et al. in 2003. So, the experimental data was obtained using the laboratory mini-rainfall-simulator over cylindrical soil samples at the laboratory. Their parameters were obtained using Solver add-ins in the Excel software. Then, the results were compared using the root-mean-square error (RMSE). The results showed that the KDW model could better predict the preferential flow (with lower RMSE). Also, the regression results showed 1) there was no significant relation between the preferential flow and the total porosity, and 2) there is a significant relation between the preferential flow and the macrospores. LA eng UL http://jstnar.iut.ac.ir/article-1-3381-en.html M3 10.29252/jstnar.22.4.129 ER -