caa a22 4500 467930767 CHVBK 20180406152942.0 cr unu---uuuuu 170328e20060601xx s 000 0 eng 10.1007/s10706-005-3229-9 doi (NATIONALLICENCE)springer-10.1007/s10706-005-3229-9 Design of Inclined Covers with Capillary Barrier Effect [Elektronische Daten] [Serge-Étienne Parent, Alexandre Cabral] A design procedure is proposed to minimize water infiltration into landfills by optimizing the water diversion length of inclined covers with capillary barrier effect (CCBE). This design procedure is based on a conceptual, mathematical and numerical approach and aims at selecting materials and optimizing layer thickness. Selection among candidate materials is made based on their hydraulic conductivity functions and on a threshold infiltration rate imposed on the designer. The capillary break layer (CBL; bottom layer) is characterized by a weak capillarity, while the moisture retention layer (MRL; upper layer) is characterized by a compromise between strong capillarity and high hydraulic conductivity. The thickness of the CBL corresponds to the height where suction reaches its maximum value for a given infiltration rate. This height can be calculated using the Kisch [Géotechnique 9 (1959)] model. The optimal thickness of the MRL is determined by applying an adaptation of the Ross [Water Resources Research 26 (1990)] model. The results obtained using the proposed design procedure were compared to those obtained from numerical simulations performed using a finite element unsaturated seepage software. The procedure was applied for two cover systems; one where deinking by-products (DBP) were used as MRL and sand as CBL and another where sand was used as MRL and gravel as CBL. Using this procedure, it has been shown that an infiltration control system composed of thin layers of sand over gravel is highly efficient in terms of diversion length and that its efficiency can be enhanced by placing a hydraulic barrier - such as a layer of DBP - above the MRL. Springer, 2006 capillary barrier nationallicence landfill cover nationallicence lateral diversion nationallicence unsaturated flow nationallicence CBL : capillary break layer nationallicence CCBE : Cover with capillary barrier effect nationallicence DBP : Deinking by-product nationallicence MRL : Moisture retention layer nationallicence k -function : Hydraulic conductivity function nationallicence WRC : Water retention curve nationallicence Parent Serge-Étienne Department of Civil Engineering, Faculty of Applied Science, University of Sherbrooke, 2500, University Boulevard, J1K 2R1, Sherbrooke, Quebec, Canada aut Cabral Alexandre Department of Civil Engineering, Faculty of Applied Science, University of Sherbrooke, 2500, University Boulevard, J1K 2R1, Sherbrooke, Quebec, Canada aut Geotechnical & Geological Engineering Kluwer Academic Publishers 24/3(2006-06-01), 689-710 0960-3182 24:3<689 2006 24 10706 https://doi.org/10.1007/s10706-005-3229-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10706-005-3229-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Parent Serge-Étienne Department of Civil Engineering, Faculty of Applied Science, University of Sherbrooke, 2500, University Boulevard, J1K 2R1, Sherbrooke, Quebec, Canada aut NATIONALLICENCE 700 1- Cabral Alexandre Department of Civil Engineering, Faculty of Applied Science, University of Sherbrooke, 2500, University Boulevard, J1K 2R1, Sherbrooke, Quebec, Canada aut NATIONALLICENCE 773 0- Geotechnical & Geological Engineering Kluwer Academic Publishers 24/3(2006-06-01), 689-710 0960-3182 24:3<689 2006 24 10706 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer