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Leachate <br />thickness <br />qL <br />The GSE Drainage Design Manual <br />where 9rrq = required hydraulic transmissivity for gegnet or geoco <br />Nf:ll :f""-,:i:::':: ::::ty- xl 1i"93' I s,uu cpu) i lh * : : o'r <br />(kPa); /wat,,= unit weight of water (kd*'); atrd yc*= uhit *igltt of gas <br />lable 4.3 provides density and viscosity values for vaxious flui+Js f:or r <br />Table 4.3 Density and viscosity of va fluids [Thiel, I <br />(2) Values ar€ Et $tandard tsrnporalure and pressure. <br />1B " Vegetative Cover <br />Chapter 4-Methods And Coneepts <br />(m3/sec per m <br />viscosity of water <br />3\ <br />in Equation 4"12" <br />ln layer undler the' <br />be collected at the <br />Butt€ ca$e <br />Venting and <br />p Collection <br />Weiste Interim CoverSoil <br />ver system. <br />r aDle 'l.J provtoes denslfy and viscosity values for vapious fluids f:or uAgain we note that a ,very significant side benefit of providing a gas colftlrfinal cover is that it will also serve to collect sideslope^seepp. t[, ,i*,p, *outoe ofthe geocomposite gas collection layer, as illus?rated i,!r rigur" +"s" <br />1B " Soil Barrier Laver(k < 1o-5.ro)_ <br />f <br />Perforated LatemtF,E <br />15q O.C. to Vent Gss <br />Figure 4.5 Seep collection at toe of gas collection fayer under final <br />4,2.3 Landfill Leaehate Collection and Removal Syl,tem <br />impingement into the reachate collection rayer js buffered due rof overlying wasre and soil materiar making ttr-llc" "i!r"r,ipi <br />Perforated PE Underdrain pipe to <br />Collect Seepage Underlain 6y <br />Geomembrane RuLr Sheet <br />at <br />Drain Seeps <br />relatively <br />Page 4-7 <br />much <br />Iarge <br />rnOre