Evaluating of Efficiency of Empirical Formulae Based on Grain-Size and Infiltration Equations for Estimating Sediment Hydraulic Conductivity (Case Study: Jarmeh Flood Spreading System, Khuzestan Province) | ||
| نشریه علمی - پژوهشی مرتع و آبخیزداری | ||
| Article 18, Volume 70, Issue 1, June 2017, Pages 235-246 PDF (1.57 M) | ||
| Document Type: Research Paper | ||
| DOI: 10.22059/jrwm.2017.61980 | ||
| Authors | ||
| mohammad moazami* ; Sadat Feiznia; Majid Khayyat Kholghi; Arash Malekian | ||
| assistant professor, nature reclamation department/ khuzestan agriculture & natural resources university | ||
| Abstract | ||
| Hydraulic conductivity is an important parameter for controling water flow through porous media. Hence, accurate estimation of this parameter is important for evaluating flow exchange between surface water and groundwater. In this study, 12 empirical formulae based on grain-size and 4 infiltration equations were used for estimating hydraulic conductivity on 3 sites in Jarmeh flood spreading system, Khuzestan Province. Results were evaluated using measured hydraulic conductivity by double rings infiltrometer. The results of the empirical formulae showed that 9 formulae were overestimated or underestimated and 3 formulae were close to measured values. Hazen formula gave the largest overestimation and Slitcher formula gave the largest underestimation and Shepherd formula is the best one. Generally, empirical formulae applicability requires the calibration of C coefficients. The results of the infiltration equations showed that all of 4 equations estimated hydraulic conductivity appropriately and there are no significant differences between them. Among the equations, Kastiakov and Green-Ampt were the best. | ||
| Keywords | ||
| Hydraulic conductivity; Empirical formulae; Infiltration equations; Double Rings; Khuzestan | ||
| References | ||
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