Drainage Design Manual, Hydrology - Flood Control District of ...

Drainage Design Manual for Maricopa County
Hydrology: List of Tables
List of Tables
1 INTRODUCTION
2 RAINFALL
Table 2.1 Depth-Area Reduction Factors for the 6-Hour Duration Rainfall ........................ 2-6
Table 2.2 Depth-Area Reduction Factors for the 24-Hour Duration Rainfall ...................... 2-8
Table 2.3 2-Hour Storm Distribution for Stormwater Storage Design .............................. 2-10
Table 2.4 6-Hour Distributions.......................................................................................... 2-13
Table 2.5 24-Hour Distribution ......................................................................................... 2-17
3 RATIONAL METHOD
Table 3.1 Equation for Estimating Kb in the Tc Equation................................................... 3-3
Table 3.2 Runoff Coefficients for Maricopa County............................................................ 3-5
Table 3.3 Runoff Coefficient Descriptions for Maricopa County......................................... 3-6
4 RAINFALL LOSSES
Table 4.1 Green and Ampt Loss Rate Parameter Values for Bare Ground ..................... 4-10
Table 4.2 IA, RTIMP, and Vegetative Canopy Cover for Representative Land Uses ...... 4-17
Table 4.3 Published Values of Uniform Loss Rates ......................................................... 4-19
Table 4.4 Initial Loss Plus Uniform Loss Rate Parameter Values.................................... 4-20
5 UNIT HYDROGRAPH PROCEDURES
Table 5.1 Runoff Hydrograph ............................................................................................. 5-9
Table 5.2 Slope Adjustment for Steep Watercourses ...................................................... 5-14
Table 5.3 Equation for Estimating Kb in the Tc Equation................................................. 5-17
Table 5.4 Values of the Synthetic Dimensionless Time-Area Relations .......................... 5-21
Table 5.5 Tabulation of Coordinates for S-graphs ........................................................... 5-27
Table 5.6 S-Graphs and Kn Values.................................................................................. 5-29
6 MULTIPLE FREQUENCY MODELING
Table 6.1 Ratios to 100-year Flood Hydrographs .............................................................. 6-2
7 CHANNEL ROUTING
8 INDIRECT METHODS
Table 8.1 USGS Data Listing for Watersheds.................................................................... 8-8
Table 8.2 Flood Magnitude-Frequency Relations for the Central AZ Region (R12)......... 8-14
Table 8.3 Flood Magnitude-Frequency Relations for the Southern AZ Region (R13)...... 8-17
9 APPLICATION
Table 9.1 Example Depth-Duration-Frequency Statistics from Figures ............................. 9-4
Table 9.2 Example Computed Intensity-Duration-Frequency Data.................................... 9-5
Table 9.3 Time of Concentration Physical Data ............................................................... 9-14
Table 9.4 Example Depth-Duration-Frequency Statistics from GIS ................................. 9-17
Table 9.5 Example Computed Intensity-Duration-Frequency Data.................................. 9-17
Table 9.6 Rainfall Loss Characteristics for Each Soil Map Unit ....................................... 9-35
Table 9.7 Summary of Soils Characteristics for Each Subbasin ...................................... 9-36
Table 9.8 Rainfall Loss Characteristics for Each Land Use ............................................. 9-38
Table 9.9 Summary of Land Use Characteristics for Each Subbasin .............................. 9-39
10 REFERENCES
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