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Land Use Hydrologic Area (acres) Soil Group A 25 Forestland-orchards B 30 B 45 Forest Oak-Aspen C 60 A 80 Open Spaces B 65 A 120 Residential (1/2-acre lots) B 155 Storm Hyetograph Time Rainfall Interval Intensity (hours) (in/hr) 0-1 1.2 1-2 1.3 2-3 1.9 3-4 1.5 4-5 1.3 5-6 1 6-7 0.8 1 Hour-Unit Hydrograph Time UH [hr] [cfs/in] 0 0 1 60 2 120 3 140 4 80 5 40 6 10 7 0 The McCray Creek watershed is a composite basin consisting of soil group A, B and C soils. The land use areas within each hydrologic soil group are tabulated below. Assuming an average antecedent runoff condition (ARC I) and fair ground cover 1. (25 points) Calculate the depth of direct runoff from a 9- inch storm event using the NRCS method. 2. (25 points) Using the NRCS Method and the storm hyetograph provided, compute and plot the excess rainfall hyetograph. 3. (25 points) Compute and plot the NRCS Synthetic Unit Hydrograph for McCray Creek for 1 hour of excess precipitation. 4. (25 points) Given the 1-Hour Unit Hydrograph and the ERH created in part 2. Compute and plot the storm hydrograph. Assume a base flow of 130 cfs. MCCRAY CREEK WATERSHED Howard's Creek Outlet, Elevation 457 ft L= 10,000 ft Elevation 633 ft Land Use Hydrologic Soil Group Area (acres) A 25 Forestland -orchards B 30 B 45 Forest Oak-Aspen C 60 A 80 Open Spaces B 65 A 120 Residential (1/2-acre lots) B 155

Land Use Hydrologic Area (acres) Soil Group A 25 Forestland-orchards B 30 B 45 Forest Oak-Aspen C 60 A 80 Open Spaces B 65 A 120 Residential (1/2-acre lots) B 155 Storm Hyetograph Time Rainfall Interval Intensity (hours) (in/hr) 0-1 1.2 1-2 1.3 2-3 1.9 3-4 1.5 4-5 1.3 5-6 1 6-7 0.8 1 Hour-Unit Hydrograph Time UH [hr] [cfs/in] 0 0 1 60 2 120 3 140 4 80 5 40 6 10 7 0 The McCray Creek watershed is a composite basin consisting of soil group A, B and C soils. The land use areas within each hydrologic soil group are tabulated below. Assuming an average antecedent runoff condition (ARC I) and fair ground cover 1. (25 points) Calculate the depth of direct runoff from a 9- inch storm event using the NRCS method. 2. (25 points) Using the NRCS Method and the storm hyetograph provided, compute and plot the excess rainfall hyetograph. 3. (25 points) Compute and plot the NRCS Synthetic Unit Hydrograph for McCray Creek for 1 hour of excess precipitation. 4. (25 points) Given the 1-Hour Unit Hydrograph and the ERH created in part 2. Compute and plot the storm hydrograph. Assume a base flow of 130 cfs. MCCRAY CREEK WATERSHED Howard's Creek Outlet, Elevation 457 ft L= 10,000 ft Elevation 633 ft Land Use Hydrologic Soil Group Area (acres) A 25 Forestland -orchards B 30 B 45 Forest Oak-Aspen C 60 A 80 Open Spaces B 65 A 120 Residential (1/2-acre lots) B 155

Solid Waste Engineering
Solid Waste Engineering
3rd Edition
ISBN:9781305635203
Author:Worrell, William A.
Publisher:Worrell, William A.
Chapter8: Landfills
Section: Chapter Questions
Problem 8.9P
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Land Use Hydrologic Area (acres) Soil Group A 25 Forestland-orchards B 30 B 45 Forest Oak-Aspen C 60 A 80 Open Spaces B 65 A 120 Residential (1/2-acre lots) B 155 Storm Hyetograph Time Rainfall Interval Intensity (hours) (in/hr) 0-1 1.2 1-2 1.3 2-3 1.9 3-4 1.5 4-5 1.3 5-6 1 6-7 0.8 1 Hour-Unit Hydrograph Time UH [hr] [cfs/in] 0 0 1 60 2 120 3 140 4 80 5 40 6 10 7 0
Transcribed Image Text:Land Use Hydrologic Area (acres) Soil Group A 25 Forestland-orchards B 30 B 45 Forest Oak-Aspen C 60 A 80 Open Spaces B 65 A 120 Residential (1/2-acre lots) B 155 Storm Hyetograph Time Rainfall Interval Intensity (hours) (in/hr) 0-1 1.2 1-2 1.3 2-3 1.9 3-4 1.5 4-5 1.3 5-6 1 6-7 0.8 1 Hour-Unit Hydrograph Time UH [hr] [cfs/in] 0 0 1 60 2 120 3 140 4 80 5 40 6 10 7 0
The McCray Creek watershed is a composite basin consisting of soil group A, B and C soils. The land use areas within each hydrologic soil group are tabulated below. Assuming an average antecedent runoff condition (ARC I) and fair ground cover 1. (25 points) Calculate the depth of direct runoff from a 9- inch storm event using the NRCS method. 2. (25 points) Using the NRCS Method and the storm hyetograph provided, compute and plot the excess rainfall hyetograph. 3. (25 points) Compute and plot the NRCS Synthetic Unit Hydrograph for McCray Creek for 1 hour of excess precipitation. 4. (25 points) Given the 1-Hour Unit Hydrograph and the ERH created in part 2. Compute and plot the storm hydrograph. Assume a base flow of 130 cfs. MCCRAY CREEK WATERSHED Howard's Creek Outlet, Elevation 457 ft L= 10,000 ft Elevation 633 ft Land Use Hydrologic Soil Group Area (acres) A 25 Forestland -orchards B 30 B 45 Forest Oak-Aspen C 60 A 80 Open Spaces B 65 A 120 Residential (1/2-acre lots) B 155
Transcribed Image Text:The McCray Creek watershed is a composite basin consisting of soil group A, B and C soils. The land use areas within each hydrologic soil group are tabulated below. Assuming an average antecedent runoff condition (ARC I) and fair ground cover 1. (25 points) Calculate the depth of direct runoff from a 9- inch storm event using the NRCS method. 2. (25 points) Using the NRCS Method and the storm hyetograph provided, compute and plot the excess rainfall hyetograph. 3. (25 points) Compute and plot the NRCS Synthetic Unit Hydrograph for McCray Creek for 1 hour of excess precipitation. 4. (25 points) Given the 1-Hour Unit Hydrograph and the ERH created in part 2. Compute and plot the storm hydrograph. Assume a base flow of 130 cfs. MCCRAY CREEK WATERSHED Howard's Creek Outlet, Elevation 457 ft L= 10,000 ft Elevation 633 ft Land Use Hydrologic Soil Group Area (acres) A 25 Forestland -orchards B 30 B 45 Forest Oak-Aspen C 60 A 80 Open Spaces B 65 A 120 Residential (1/2-acre lots) B 155
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