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

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Drainage Design Manual for Maricopa County Hydrology: Table of Contents 4.5 PROCEDURE FOR ESTIMATING LOSS RATES . . . . . . . . . 4-20 4.5.1 Green and Ampt Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20 4.5.2 Initial Loss Plus Uniform Loss Rate Method . . . . . . . . . . . . . . . . . . . . . . . 4-22 5 UNIT HYDROGRAPH PROCEDURES TABLE OF CONTENTS . . . . . . . . . . . . . . . 5-1 5.1 GENERAL . . . . . . . . . . . . . . . . . . . 5-1 5.2 CLARK UNIT HYDROGRAPH . . . . . . . . . . . . . . 5-3 5.3 LIMITATIONS AND APPLICATIONS . . . . . . . . . . . . 5-11 5.4 DEVELOPMENT OF PARAMETER ESTIMATORS . . . . . . . . 5-11 5.5 ESTIMATION OF PARAMETERS . . . . . . . . . . . . . 5-12 5.5.1 Time of Concentration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12 5.5.2 Storage Coefficient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17 5.5.3 Time-Area Relation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18 5.6 S-GRAPHS . . . . . . . . . . . . . . . . . . . 5-21 5.6.1 Limitations and Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24 5.6.2 Sources of S-Graphs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25 5.6.3 S-Graphs for Use in Maricopa County . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25 5.6.4 Estimation of Lag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-28 5.7 PROCEDURES . . . . . . . . . . . . . . . . . . 5-30 5.7.1 Clark Unit Hydrograph. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-30 5.7.2 S-Graph. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-31 6 MULTIPLE FREQUENCY MODELING TABLE OF CONTENTS . . . . . . . . . . . . . . . 6-1 6.1 BACKGROUND. . . . . . . . . . . . . . . . . . 6-1 6.2 APPROACH . . . . . . . . . . . . . . . . . . 6-1 6.3 IMPLEMENTATION IN HEC-1 . . . . . . . . . . . . . . 6-2 7 CHANNEL ROUTING TABLE OF CONTENTS . . . . . . . . . . . . . . . 7-1 7.1 GENERAL . . . . . . . . . . . . . . . . . . . 7-1 7.2 NORMAL-DEPTH ROUTING . . . . . . . . . . . . . . 7-2 7.2.1 Parameter Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 7.3 KINEMATIC WAVE ROUTING . . . . . . . . . . . . . . 7-2 7.3.1 Collector Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 7.3.2 Main Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3 7.3.3 Parameter Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3 7.4 MUSKINGUM ROUTING . . . . . . . . . . . . . . . 7-3 7.4.1 Parameter Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4 7.5 MUSKINGUM-CUNGE ROUTING . . . . . . . . . . . . . 7-4 7.5.1 Parameter Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4 8 INDIRECT METHODS TABLE OF CONTENTS . . . . . . . . . . . . . . . 8-1 8.1 GENERAL . . . . . . . . . . . . . . . . . . . 8-1 8.2 INDIRECT METHOD NO. 1 - UNIT PEAK DISCHARGE CURVES . . . . 8-2 8.3 INDIRECT METHOD NO. 2 - USGS DATA FOR ARIZONA . . . . . . 8-4 8.4 INDIRECT METHOD NO. 3 - REGIONAL REGRESSION EQUATIONS . . . 8-12 8.5 APPLICATIONS AND LIMITATIONS . . . . . . . . . . . . 8-19 8.6 PROCEDURES . . . . . . . . . . . . . . . . . . 8-20 9 APPLICATION TABLE OF CONTENTS . . . . . . . . . . . . . . . 9-1 x August 15, 2013
Drainage Design Manual for Maricopa County Hydrology: Table of Contents 9.1 RAINFALL . . . . . . . . . . . . . . . . . . . 9-2 9.1.1 Procedure for the Development of the Design Rainfall . . . . . . . . . . . . . . . . 9-2 9.1.2 User Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3 9.1.3 Rainfall Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4 9.2 RATIONAL METHOD . . . . . . . . . . . . . . . . 9-9 9.2.1 Procedures for the Peak Discharge Calculation . . . . . . . . . . . . . . . . . . . . . 9-9 9.2.2 Procedures for Volume Calculations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10 9.2.3 Procedures for the Multiple Basin Approach. . . . . . . . . . . . . . . . . . . . . . . 9-10 9.2.4 User Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12 9.2.5 Rational Method Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-14 9.3 RAINFALL LOSSES . . . . . . . . . . . . . . . . 9-25 9.3.1 Procedures for the Green and Ampt Method . . . . . . . . . . . . . . . . . . . . . . 9-25 9.3.2 Procedures for the Initial Loss Plus Uniform Loss Rate Method. . . . . . . . 9-27 9.3.3 User Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-27 9.3.4 Rainfall Losses Example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-29 9.4 UNIT HYDROGRAPH . . . . . . . . . . . . . . . . 9-43 9.4.1 Procedures for the Clark Unit Hydrograph . . . . . . . . . . . . . . . . . . . . . . . . 9-43 9.4.2 Procedures for the S-Graph . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-44 9.4.3 User Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-45 9.4.4 Unit Hydrograph Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-47 9.5 CHANNEL ROUTING . . . . . . . . . . . . . . . . 9-63 9.5.1 Application of Normal-Depth Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-63 9.5.2 Application of Kinematic Wave Routing . . . . . . . . . . . . . . . . . . . . . . . . . . 9-63 9.5.3 Application of Muskingum Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-64 9.5.4 Application of Muskingum-Cunge Routing . . . . . . . . . . . . . . . . . . . . . . . . 9-65 9.6 INDIRECT METHODS . . . . . . . . . . . . . . . . 9-65 9.6.1 Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-65 10 REFERENCES APPENDIX A RAINFALL A.1 NOAA Atlas 14 Point Rainfall Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1 A.2 NOAA Atlas 2 Point Precipitation Maps . . . . . . . . . . . . . . . . . . . . . . . . . .A-63 A.3 Precipitation Depth-Duration Figure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-77 A.4 PREFRE Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-81 APPENDIX B I-D-F GRAPH B.1 Intensity-Duration-Frequency for Phoenix-Sky Harbor . . . . . . . . . . . . . . . .B-1 APPENDIX C LOSS RATE PARAMETER TABLES C.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1 C.2 Aguila-Carefree Soil Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-7 C.3 Maricopa Central Soil Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-25 C.4 Eastern Maricopa/Northern Pinal Soil Survey. . . . . . . . . . . . . . . . . . . . . .C-43 APPENDIX D UNIT HYDROGRAPH D.1 K n Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-1 August 15, 2013 xi
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