... Figures 10. 9, 10. 10, and 10. 11 show soil loss that is tolerable for sustained crop production for both thin and thick soils (Wischmeier and Smith 1978).Figure 10. 9 compares estimates for water, ... beginning thickness for a bioreactor and a conventional landll.© 2009 by Taylor & Francis Group, LLC152 Evapotranspiration Covers for Landfills and Waste Sites 10. 10.1 So I l th I c k ... Evapotranspiration Covers for Landfills and Waste Sitesto an understanding of the principles of soil erosion control, and to ET landll cover design, construction, and maintenance. 10. 7.1 Wa t e r er...