Chapter 19 - PowerPoint 3

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					        Chapter 19
         Urban Soils


T19-1              Soil Science and Management, 4E
                     Objectives
        •   List characteristics of many urban soils
        •   Describe ways of dealing with urban soils
        •   Describe modified and structural soils
        •   Describe erosion control on urban sites
        •   Discuss zero-runoff concepts




T19-2                                 Soil Science and Management, 4E
                  Terms to Know
        •   Bioswales
        •   Bioremediation
        •   Brown fields
        •   Debris basins
        •   Hydroseeding
        •   Retention ponds
        •   Recharge basins
        •   Rip-rap
        •   Silt fences

T19-3                         Soil Science and Management, 4E
Characteristics of Urban Soils
        •   Soil variability and classification
        •   Buried debris
        •   Compaction
        •   Soil contamination
            – Deicing salts
            – Heavy-metal contamination
            – Brown fields
T19-4                                    Soil Science and Management, 4E
                Urban Erosion
        • Controlling erosion
          – Keeping disturbed areas small
          – Protect disturbed areas
          – Keep runoff velocities low
          – Divert runoff away from disturbed areas
          – Retain sediment on-site
        • Establishing vegetation
        • Calculating soil loss
T19-5                              Soil Science and Management, 4E
                        Summary
        • Urban soils exhibit:
           – Great variation
           – Poor soil
           – Buried debris
           – Compaction
           – Contamination
        • Difficult to classify
        • Modified and structured soils can improve growth of
          trees and plants
        • Keep disturbed areas small
        • Establish vegetative cover
        • Divert runoff
T19-6                                       Soil Science and Management, 4E

				
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