TY - JOUR JF - JSTNAR JO - jwss VL - 22 IS - 4 PY - 2019 Y1 - 2019/3/01 TI - Preferential Flow Modeling Using Kinematic-Dispersive Wave Model and the Role of Macrospores TT - مدل‌‌سازی جریان ترجیحی با استفاده از مدل موج سینماتیک- پخشی (KDW) در خاک و نقش ماکروپورها در ایجاد آن N2 - 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. SP - 129 EP - 142 AU - Mirzaei, M. R. AU - Ruy, S. AD - 1. Department of Forestry, Faculty of Agriculture, Yasouj University, Yasouj, Iran. KW - Preferential flow KW - Kinematic-dispersive wave model KW - Soil drainage hydrographs KW - Macrospores KW - Mini rainfall simulator UR - http://jstnar.iut.ac.ir/article-1-3381-en.html DO - 10.29252/jstnar.22.4.129 ER -