| Text | 299569 2015 10.1061/ ASCE HE.1943 5584.0001073 ISI Web of Science WOS 000356238600005 Scopus 2 s2.0 84988253926 Dual porosity Solute transport Mathematical solutions Modeling Transport in Dual Permeability Media with Unequal Dispersivity and Velocity Antonella Sciortino, Feike J. Leij, Maria Clementina Caputo, and Nobuo Toride Associate Professor, Dept. of Civil Engineering and Construction Engineering Management, California State Univ., 1250 Bellflower Blvd., Long Beach, CA Lecturer, Dept. of Civil Engineering and Construction Engineering Management, California State Univ., 1250 Bellflower Blvd., Long Beach, CA Researcher, Consiglio Nazionale delle Ricerche, Istituto di Ricerca Sulle Acque, via F. De Blasio, 5, 70132 Bari, Italy Professor, Laboratory of Soil Physics and Hydrology, Faculty of Bioresources, Mie Univ., 1577 Kurima Machiya, Tsu 514 8507, Japan Porous media such as fractured rock and aggregated soils consist of two pore domains with distinct transport properties. A numerical code was developed to simulate solute concentrations in the two domains using a partitioned solution procedure to efficiently model transport in dual permeability media. Furthermore, an approximate analytical solution was obtained that allows for different advective and dispersive terms in both flow domains, for a first type or a third type inlet condition. Solutions were obtained for local concentrations in both domains as well as effluent concentration and the concentration per medium volume. The problem was solved by decoupling the transport equations using diagonalization. This involves an error for the dispersivity matrix that is related to the difference in dispersivity of both domains. The correctness of the solution was assessed by comparison with numerical results. For low Damkohler numbers the solution was accurate even for a dispersivity ratio of 10. The need for a dual dispersivity instead of a single dispersivity model was illustrated with sample breakthrough curves and the solution was applied to optimize experimental breakthrough curves for an Andisol with a distinct intraaggregate and interaggregate porosity. 20 Published version http //ascelibrary.org/doi/abs/10.1061/%28ASCE%29HE.1943 5584.0001073 22/07/2014 Modeling Transport in Dual Permeability Media with Unequal Dispersivity and Velocity This manuscript was submitted on June 26, 2013; approved on July 22, 2014; printed on July 2015 _ASCE_HE_2014_ 0.pdf Articolo in rivista The Society, 1084 0699 Journal of hydrologic engineering Journal of hydrologic engineering J. hydrol. eng. Journal of hydrologic engineering Hydrologic engineering ASCE journal of hydrologic engineering mariaclementina.caputo CAPUTO MARIA CLEMENTINA TA.P05.006.007 Fattori critici dei rischi di siccita e strategie dintervento |
