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Study and Comparison the Efficiency of Mualem- Van Genuchten and Brooks-Corey Models in Predicting Unsaturated Hydraulic Conductivity in Compacted Soi Original Article, B10 Abbaspour H, Shorafa M, Daneshfaraz R, Mohammadi MH, Rashtbari M. Journal. Civil Eng. Urban. 2(2): 56-62. 2012. ABSTRACT: Soil hydraulic properties including soil water characteristics curve and hydraulic conductivity are two important properties to determination of water movement in soil. Hydraulic conductivity plays an important role in underground water movement, water flow to porous medium and pollutants transferring. Measuring these parameters in laboratory is costly and time-consuming. So, mathematical models were developed. Nowadays, numerous empirical models were presented to prediction of unsaturated hydraulic conductivity which of these models we can point out Gardner model, Campbell, Brooks-Corey and Mualem- Van Genuchten models. Present study was conducted on compacted soils in laboratory. Samples were collected from 0-10cm depth and Compaction created by proctor in six replication and four levels including C0 (control), C1, C2 and C3 by increasing in soil bulk density with the ratio of 5, 10 and 15%, respectively. Unsaturated hydraulic conductivity for these treatments evaluated and compared using Mualem-Van Genuchten (VG) and Brooks-Corey (BC) models by RETC software and identified that unsaturated hydraulic conductivity increased due to increase in fine pores as compaction increased and amount of correlation coefficients between moisture content and unsaturated hydraulic conductivity in BC model for all compaction treatments was more than those for VG model. Keywords: Brooks-Corey model, Mualem-Van Genuchten model, soil compaction, unsaturated hydraulic conductivity منبع: [Hidden Content] دانلود: [Hidden Content].,B10-56-62.pdf J. Civil Eng. Urban.,B10-56-62.pdf