FLOOD08228

• County: Boulder
• Community: Boulder
• Stream Name: Boulder Creek
• Basin: South Platte
• Title: Urban Drainage and Flood Control District
• Date: 3/1/1990
• Prepared For: Boulder Creek
• Prepared By: Goerge V. Sabol
• Floodplain - Doc Type: Flood Mitigation/Flood Warning/Watershed Restoration

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Hydrologic Design Manual
for Maricopa County

Rainfall Losses

Initial LO~. Inches
Soli Texture Uniform Loss Rate IL
Classification CNSTL Dry Normal Saturated
(1) (2) (4)3 ~)4- (S)r
sand 4.6 1.3 1.3 0
loamy sand 1.2 0.8 0.8 0
sandY loam 0.40 0.7 0.6 0
loam 0.25 0.8 0.7 0
siltv loam 0.15 0.6 0.5 0
sandy clay loam 0.06 0.6 0.5 0
, clay loam 0.04 0.5 0.4 0
sHIV clay loam 0.04 0.6 0.5 0
sandY clay 0.02 0.4 0.3 0
sillY clav 0,02 0.4 0.3 0
clav 0.01 0.3 0.2 0

Table 4.3
Initial Loss Plus Uniform Loss Rate Parameter Values
for Bare Ground according to Soli Texture Classification

1 Selection of IL:
Dry = Nonlrrlgated lands such as desert and rangeland;
Normal = Irrigated lawn, turf, and permanent pasture;
Saturated = Irrigated agricultural land.

Initial LO~. Inches
Hydrologic 5011 Uniform Loss Rate IL '
Group CNSTl Dry Normal Saturated
(1) (2) (tfJ :3 (J)?- ~~
A - 0.4 0.6 0.5 0
B 0.25 0.5 0.3 0
C 0.15 0.5 0.3 0
D 0.05 0.4 0.2 0

Table 4.4
Initial Loss Plus Uniform Loss Rate Parameter Values
for Bare Ground according to Hydrologic SOli Group

1 Selection ~f IL:
Dry = Nonlrrlgated lands such as desert and rangeland;
Normal = Irrigated lawn, turf, and permanent pasture;
Saturated = Irrigated agricultural land.

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