Laserfiche WebLink
<br />e <br /> <br />. <br /> <br />. <br /> <br />e <br /> <br />. <br /> <br />. <br /> <br />e <br /> <br />t <br />I <br />, <br /> <br />R1V!RSIOI: <br /> <br /> <br /> <br />PERVIOUS TO. TRlNCW <br /> <br />PERVIOUS STRATUM <br /> <br />. . <br /> <br />. . . . . <br /> <br />EM 1110-2-1913 <br />31 Mar 78 <br /> <br />LANDS IDE <br /> <br />RF:L1F:F JIIF:US <br /> <br /> <br />Figure 5-3. TYPical pervious toe trench with collector <br />pipe (Figure 5-6 shows trench details) <br /> <br />Collector systems are usually not required for agricultural levees but <br />find wider use in connection with urban levees. <br /> <br />b. Location. As seen in figures 5-2 and 5-3, pervious drainage <br />trenches are generally located at the levee toe, but are sometimes con- <br />structed beneath the downstream levee slope as shown in figure 5-4. <br /> <br />RIVERSIDE <br /> <br />~ <br /> <br />L <br /> <br /> <br />L....NDSI DE <br /> <br />L/2 <br /> <br /> <br />I HORIZONTAl. <br />DRAI/oIAIJ. LAYeR <br /> <br />.,.. <br /> <br />Figure 5-4. Pervious toe trench located <br />beneath landward slope <br /> <br />5-5 <br />