HomeMy WebLinkAboutHMP 15-01; MARTIN RESIDENCE; PRELIMINARY DRAINAGE STUDY; 2016-12-13---------
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Circular Channel Analysis & Design
Solved with Manning's Equation
Open Channel -Uniform flow
Worksheet Name:
Comment: 6" PVC @ l'lr
Solve For Full Flow Capacity
Given Input Data:
Diameter ......... .
Slope ............ .
Manning's n ...... .
Discharge ........ .
Computed Results:
Full Flow Capacity .... .
Full Flow Depth ....... .
Velocity ......... .
Flow Area ........ .
Critical Depth ... .
Critical Slope ... .
Percent Full ..... .
Full Capacity .... .
QMAX @.94D ....... .
Froude Number .... .
0.50 ft
0.0100 ft/ft
0.011
0.66 cfs
0.66 cfs ~
0.50 ft
3.38 fps
0.20 sf
0.41 ft
0.0099 ft/ft
100.00 !fr
0.66 cfs
O. 71 cfs
FULL
Open Channel Flow Module, Version 3.21 (c) 1990
Haestad Methods, Inc. * 37 Brookside Rd* Waterbury, Ct 06708
/s
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Circular Channel Analysis & Design
Solved with Manning's Equation
Open Channel -Uniform flow
worksheet Name:
Comment: 6" PVC@ 2.5\-
Solve For Full Flow Capacity
Given Input Data:
Diameter ......... .
Slope ............ .
Manning's n ...... .
Discharge ........ .
Computed Results:
Full Flow Capacity .... .
Full Flow Depth ....... .
Velocity ......... .
Flow Area ........ .
Critical Depth ... .
Critical Slope ... .
Percent Full ..... .
Full Capacity .... .
QMAX @.94D ....... .
Froude Number .... .
0.50 ft
0.0250 ft/ft
0.011
1.05 cfs
1.05 cfs 4---
0.50 ft
5.34 fps
0.20 sf
0.48 ft
0.0217 ft/ft
100.00 'Ir
1.05 cfs
1.13 cfs
FULL
Open Channel Flow Module, Version 3.21 (c) 1990
Haestad Methods, Inc. * 37 Brookside Rd* Waterbury, Ct 06708
-a Hydrologic Soil Group-San Diego County Area, California ---Hydrologic Soil Group --Hydrologlc Soll Group-Summary by Map Unit-San Diego County Area, California (CA638) -Map unit symbol Map unit name Rating -CbC Carlsbad gravelly loamy B
sand, 5 to 9 percent -slopes
CbD Carlsbad gravelly loamy B -sand, 9 to 15 percent
slopes -GaF Gaviota fine sandy loam, D -30 to 50 percent
slopes -LfC Las Flores-Urban land D
complex, 2 to 9 -percent slopes -LG-W Lagoon water
LvF3 Loamy alluvial land-D
Huerhuero complex, 9
to 50 percent slopes, -severely eroded
MIE Marina loamy coarse B
sand, 9 to 30 percent -slopes
Totals for Area of Interest
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-USDA Natural Resources
:iiiiiill Conservation Service
Web Soil Survey
National Cooperative Soil Survey --
AcresinAOI
5.7
7.4
11.6
18.6
30.4
4.3
27.3
105.2
Percent of AOI
5.4%
7.0%
11.0%
17.6%
28.9%
4.1%
26.0%
100.0%
1/23/2014
Page 3 of4
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• Hydrologic Soil Group-San Diego County Area, California -... -
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Description
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive precipitation
from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (AID, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly
wet. These consist mainly of deep, well drained to excessively drained sands or
gravelly sands. These soils have a high rate of water transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well drained
soils that have moderately fine texture to moderately coarse texture. These soils
have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of water
transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay layer
at or near the surface, and soils that are shallow over nearly impervious material.
These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (AID, BID, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in their
natural condition are in group D are assigned to dual classes.
Rating Options
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie-break Rule: Higher
• USDA Natural Resources Web Soil Survey
iiiiiill Conservation Service National Cooperative Soil Survey ,. -
1/23/2014
Page 4 of 4
11 11 11 II II II I
San Diego County Hydrology Manual
Date: June 2003
I I
Table 3-1
Ii 11 11 11 11 11 II II II
Section: 3
Page: 6 of26
RUNOFF COEFFICIENTS FOR URBAN AREAS
Land Use Runoff Coefficient "C"
Soil Type
NRCS Elements Coun Elements %IMPER. A B C D
Undisturbed Natural Terrain (Natural) Pemianent Open Space 0* 0.20 0.25 0.30 0.35
Low Density Residential (LDR) Residential, 1.0 DU/ A or less 10 0.27 0.32 0.36 0.41
Low Density Residential (LDR) Residential, 2.0 DU/A or less 20 0.34 0.38 0.42 0.46
Low Density Residential (LDR) Residential, 2.9 DU/A or less 25 0.38 0.41 0.45 0.49
Medium Density Residential (MDR) Residential, 4.3 DU/A or less 30 0.41 0.45 0.48 0.52
Medium Density Residential (MDR) Residential, 7.3 DU/A or less 40 0.48 0.51 0.54 0.57
Medium Density Residential (MDR) Residential, 10.9 DU/A or less 45 0.52 0.54 0.57 0.60
Medium Density Residential (MDR) Residential, 14.5 DU/A or less 50 0.55 0.58 0.60 0.63
High Density Residential (HDR) Residential, 24.0 DU/A or less 65 0.66 0.67 0.69 0.71
High Density Residential (HDR) Residential, 43.0 DU/A or less 80 0.76 0.77 0.78 0.79
Commercial/Industrial (N. Com) Neighborhood Commercial 80 0.76 0.77 0.78 0.79
Commercial/Industrial (G. Com) General Commercial 85 0.80 0.80 0.81 0.82
Commercial/Industrial (O.P. Com) Office Professional/Commercial 90 0.83 0.84 0.84 0.85
Commercial/Industrial (Limited I.) Limited Industrial 90 0.83 0.84 0.84 0.85
Commercial/Industrial General I. General Industrial 95 0.87 0.87 0.87 0.87
*The values associated with 0% impervious may be used for direct calculation of the runoff coefficient as described in Section 3.1.2 (representing the pervious runoff
coefficient, Cp, for the soil type), or for areas that will remain undisturbed in perpetuity. Justification must be given that the area will remain natural forever ( e.g., the area
is located in Cleveland National Forest).
DU/ A = dwelling units per acre
NRCS = National Resources Conservation Service
3-6