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1 | (10) |
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2 | (1) |
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3 | (1) |
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1.3 Maintenance Challenges and Limitations |
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4 | (1) |
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1.4 Assessment Strategies |
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5 | (2) |
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1.4.1 Visual Inspection, Testing, and Monitoring |
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6 | (1) |
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7 | (1) |
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8 | (3) |
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2 Impacts and Composition of Urban Stormwater |
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11 | (12) |
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2.1 Impacts of Urban Stormwater |
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11 | (10) |
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2.1.1 Flow and Channel Alteration |
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12 | (1) |
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12 | (1) |
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13 | (1) |
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14 | (1) |
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2.1.5 Bacteria and Viruses |
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15 | (2) |
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17 | (1) |
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2.1.7 Oxygen-Demanding Substances |
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18 | (2) |
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20 | (1) |
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2.2 Composition of Urban Stormwater |
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21 | (2) |
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3 Stormwater Treatment Processes |
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23 | (12) |
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24 | (6) |
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24 | (3) |
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27 | (1) |
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28 | (1) |
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29 | (1) |
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30 | (2) |
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3.2.1 Degradation of Organic Matter |
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30 | (1) |
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30 | (1) |
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3.2.3 Plant Growth and Nutrient Uptake |
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31 | (1) |
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32 | (3) |
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32 | (1) |
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33 | (2) |
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4 Stormwater Treatment Practices |
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35 | (18) |
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4.1 Sedimentation Practices |
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36 | (3) |
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36 | (1) |
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37 | (1) |
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4.1.3 Underground Sedimentation Devices |
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38 | (1) |
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39 | (6) |
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4.2.1 Surface Sand Filters |
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40 | (2) |
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4.2.2 Underground Sand Filters |
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42 | (1) |
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43 | (1) |
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43 | (1) |
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4.2.5 Enhanced Sand Filters |
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44 | (1) |
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4.3 Infiltration Practices |
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45 | (3) |
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4.3.1 Infiltration Basins |
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45 | (1) |
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4.3.2 Infiltration Trenches |
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46 | (1) |
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4.3.3 Permeable Pavements |
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46 | (2) |
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4.4 Biologically Enhanced Practices |
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48 | (5) |
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4.4.1 Bioretention Practices |
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48 | (1) |
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4.4.2 Bioinfiltration Practices |
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49 | (1) |
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4.4.3 Biofiltration Practices |
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49 | (1) |
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4.4.4 Constructed Wetlands |
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50 | (1) |
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4.4.5 Filter Strips and Swales |
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50 | (3) |
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5 Visual Inspection of Stormwater Treatment Practices |
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53 | (24) |
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5.1 What Is Visual Inspection? |
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53 | (2) |
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5.2 Common Visual Inspection Items |
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55 | (10) |
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55 | (1) |
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56 | (1) |
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5.2.3 Inlet and Outlet Structures |
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56 | (2) |
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5.2.4 Multicomponent Systems |
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58 | (1) |
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5.2.5 Water in the Practice |
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59 | (1) |
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60 | (1) |
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5.2.7 Erosion and Sediment Deposition |
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60 | (3) |
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5.2.8 Soil and Vegetation |
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63 | (1) |
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64 | (1) |
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5.2.10 Banks or Sides of Practices |
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64 | (1) |
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5.3 Visual Inspection for Sedimentation Practices |
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65 | (4) |
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5.3.1 Water in the Practice |
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66 | (1) |
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5.3.2 Erosion and Sediment Deposition |
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66 | (1) |
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5.3.3 Soil and Vegetation |
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67 | (1) |
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5.3.4 Downstream Conditions |
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68 | (1) |
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5.3.5 Structural Integrity |
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68 | (1) |
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5.4 Visual Inspection for Filtration Practices |
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69 | (2) |
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5.4.1 Water in the Practice |
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69 | (1) |
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5.4.2 Erosion and Sediment Deposition |
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69 | (1) |
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5.4.3 Downstream Conditions |
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70 | (1) |
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5.4.4 Soil and Vegetation |
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70 | (1) |
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5.5 Visual Inspection for Infiltration Practices |
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71 | (2) |
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5.5.1 Water in the Practice |
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71 | (1) |
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5.5.2 Erosion and Sediment Deposition |
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72 | (1) |
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5.5.3 Soil and Vegetation |
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72 | (1) |
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5.6 Visual Inspection for Biological Practices |
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73 | (4) |
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5.6.1 Inlet and Outlet Structures |
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73 | (1) |
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5.6.2 Water in the Practice |
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74 | (1) |
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5.6.3 Soil and Vegetation |
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74 | (3) |
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6 Capacity Testing of Stormwater Treatment Practices |
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77 | (16) |
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6.1 Measuring Sedimentation |
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78 | (3) |
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6.1.1 Measuring Sediment Surface Elevations |
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78 | (1) |
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6.1.2 Scheduling Maintenance |
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79 | (1) |
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79 | (1) |
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80 | (1) |
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6.1.5 Underground Sedimentation Devices |
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80 | (1) |
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6.1.6 Constructed Wetlands |
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80 | (1) |
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6.2 Measuring Infiltration/Filtration |
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81 | (6) |
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6.2.1 Measuring Saturated Hydraulic Conductivity |
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82 | (1) |
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83 | (2) |
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6.2.3 Filtration Practices |
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85 | (1) |
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6.2.4 Infiltration Basins |
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85 | (1) |
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6.2.5 Infiltration Trenches |
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86 | (1) |
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6.2.6 Permeable Pavements |
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86 | (1) |
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6.2.7 Bioretention Practices (Rain Gardens) |
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86 | (1) |
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6.2.8 Filter Strips and Swales |
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87 | (1) |
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6.3 Case Study: Capacity Testing of Infiltration Rates at a Bioinfiltration Practice |
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87 | (6) |
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88 | (1) |
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6.3.2 Assessment Techniques |
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88 | (2) |
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90 | (1) |
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6.3.4 Scheduling Maintenance |
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91 | (2) |
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7 Synthetic Runoff Testing of Stormwater Treatment Practices |
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93 | (28) |
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7.1 Measuring Sediment Retention |
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94 | (1) |
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7.2 Measuring Infiltration/Filtration Rate |
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95 | (1) |
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7.3 Finding an Adequate Water Source |
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96 | (6) |
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102 | (1) |
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7.4.1 Determining Pollutant Removal Efficiency |
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102 | (1) |
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103 | (2) |
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7.6 Underground Sedimentation Devices |
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105 | (9) |
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7.6.1 Case Study: Synthetic Runoff Testing of an Underground Sedimentation Device |
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105 | (9) |
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114 | (3) |
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117 | (1) |
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7.9 Infiltration Trenches |
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118 | (1) |
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118 | (1) |
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7.11 Scheduling Maintenance |
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119 | (2) |
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8 Monitoring of Stormwater Treatment Practices |
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121 | (16) |
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121 | (1) |
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8.2 Monitoring Sedimentation Practices |
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122 | (2) |
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123 | (1) |
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123 | (1) |
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8.2.3 Underground Sedimentation Devices |
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123 | (1) |
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8.3 Monitoring Filtration Practices |
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124 | (1) |
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8.4 Monitoring Infiltration Practices |
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125 | (1) |
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8.4.1 Infiltration Basins |
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125 | (1) |
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8.4.2 Infiltration Trenches |
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125 | (1) |
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8.4.3 Permeable Pavements |
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126 | (1) |
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8.5 Monitoring Biologically Enhanced Practices |
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126 | (2) |
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8.5.1 Bioretention Practices (Rain Gardens) |
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127 | (1) |
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8.5.2 Constructed Wetlands and Swales |
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127 | (1) |
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128 | (1) |
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8.6 Case Study: Monitoring a Dry Detention Pond with Underdrains |
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128 | (7) |
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130 | (1) |
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8.6.2 Assessment Techniques |
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130 | (2) |
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132 | (1) |
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8.6.4 Conclusions and Recommendations |
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133 | (2) |
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8.7 Scheduling Maintenance |
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135 | (2) |
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9 Water Budget Measurement |
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137 | (26) |
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138 | (2) |
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140 | (8) |
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143 | (4) |
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147 | (1) |
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9.2.3 Recommendations for Open Channel Flow |
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148 | (1) |
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148 | (5) |
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9.3.1 Closed Conduit Flow |
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148 | (1) |
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9.3.2 Partially Full Conduits |
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149 | (4) |
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153 | (7) |
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9.4.1 Infiltration Measurement Devices |
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153 | (7) |
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9.4.2 Comparison of Field Infiltrometers |
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160 | (1) |
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9.4.3 Recommendations for Measuring Infiltration |
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160 | (1) |
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160 | (3) |
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9.5.1 Recommendations for Measuring Rainfall |
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162 | (1) |
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10 Water Sampling Methods |
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163 | (30) |
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10.1 Representative Samples |
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166 | (1) |
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10.2 Number of Storm Events |
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167 | (2) |
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10.3 Samples Per Storm Events |
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169 | (7) |
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10.3.1 Flow-Weighted, Time-Weighted, and User-Defined Sampling |
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170 | (5) |
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10.3.2 Discrete and Composite Samples |
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175 | (1) |
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10.4 In Situ, On-Site, and Grab, and Automatic Sampling |
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176 | (5) |
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177 | (2) |
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10.4.2 pH or Hydrogen Ions |
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179 | (1) |
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180 | (1) |
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180 | (1) |
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181 | (1) |
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181 | (1) |
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10.5 Additional Considerations for Automatic Sampling |
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181 | (10) |
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10.5.1 Automatic Sampling Equipment |
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181 | (1) |
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10.5.2 Equipment Placement and Maintenance |
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182 | (2) |
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10.5.3 Winter Sampling in Cold Climates |
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184 | (1) |
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10.5.4 Automatic Sampling of Water Containing Suspended Solids |
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185 | (6) |
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191 | (1) |
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10.7 Recommendations for Water Sampling Methods |
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192 | (1) |
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11 Analysis of Water and Soils |
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193 | (22) |
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11.1 Selecting Analytical Methods |
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193 | (1) |
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11.2 Constituents in Water |
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194 | (5) |
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195 | (1) |
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11.2.2 Salinity-Related Variables |
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195 | (1) |
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11.2.3 Natural Organic Matter |
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196 | (1) |
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196 | (2) |
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198 | (1) |
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198 | (1) |
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198 | (1) |
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199 | (8) |
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200 | (5) |
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205 | (2) |
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11.4 Quality Assurance Program |
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207 | (5) |
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207 | (1) |
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11.4.2 Quality Assessment |
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208 | (1) |
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209 | (1) |
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210 | (1) |
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211 | (1) |
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11.5 Implementation and Verification |
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212 | (2) |
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11.6 Recommendations for Analysis of Water and Soils |
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214 | (1) |
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215 | (50) |
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12.1 Data Analysis for Visual Inspection |
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215 | (1) |
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12.2 Data Analysis for Capacity Testing |
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216 | (9) |
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12.2.1 Assessment of Saturated Hydraulic Conductivity and Retention Time for Filtration Practices |
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216 | (4) |
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12.2.2 Assessment of Saturated Hydraulic Conductivity and Retention Time for Infiltration Practices |
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220 | (5) |
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12.2.3 Sediment Accumulation Testing |
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225 | (1) |
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12.3 Data Analysis for Synthetic Runoff Testing |
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225 | (10) |
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12.3.1 Assessment of Saturated Hydraulic Conductivity and Retention Time for Filtration Practices |
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226 | (3) |
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12.3.2 Assessment of Saturated Hydraulic Conductivity and Retention Time for Infiltration Practices |
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229 | (4) |
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12.3.3 Assessment of Volume Reduction for Infiltration Practices |
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233 | (1) |
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12.3.4 Assessment of Pollutant Removal |
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234 | (1) |
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12.4 Data Analysis for Monitoring |
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235 | (30) |
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12.4.1 Assessment of Stormwater Volume Reduction |
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236 | (5) |
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12.4.2 Assessment of Pollutant Removal |
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241 | (24) |
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13 Maintenance of Stormwater Treatment Practices |
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265 | (20) |
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13.1 Maintenance of Sedimentation Practices |
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267 | (5) |
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267 | (3) |
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13.1.2 Frequency, Effort, and Cost |
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270 | (2) |
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272 | (1) |
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13.2 Maintenance of Filtration Practices |
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272 | (3) |
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272 | (2) |
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13.2.2 Frequency, Effort, and Cost |
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274 | (1) |
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275 | (1) |
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13.3 Maintenance of Infiltration Practices |
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275 | (4) |
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276 | (1) |
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13.3.2 Frequency, Effort, and Cost |
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277 | (1) |
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278 | (1) |
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13.4 Maintenance of Biologically Enhanced Practices |
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279 | (6) |
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279 | (2) |
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13.4.2 Frequency, Effort, and Cost |
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281 | (2) |
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283 | (2) |
Appendix A Visual Inspection Checklists |
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285 | (36) |
References |
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321 | (10) |
Index |
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331 | |