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ASCE 9780784410042 2009

$41.71

Curve Number Hydrology

Published By Publication Date Number of Pages
ASCE 2009 117
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This volume investigates the origin, development, role, application, and current status of the curve number method for estimating the runoff response from rainstorms.

PDF Catalog

PDF Pages PDF Title
8 Contents
12 I: INTRODUCTION
Purpose and Charge
13 Authority, Sources, Leadership
14 Rainfall-Runoff
Need
15 Method
Roles
17 II: CURVE NUMBER METHOD
Development
20 Curve Numbers and Land Uses
Handbook tables
22 Soils
24 CN Adjustments between Hydrologic Soil Groups
25 Antecedent Moisture
27 Application
Modes of Application
29 Drainage Area
30 Storm Size Limitations
Annual Events
Summary
32 III: FINDINGS and DEVELOPMENTS
Structure of the Basic Equation
Dimensionless Expressions
33 General Forms
Water Budget Forms
34 Water Budget Allocations
Solutions
Other Derivations and Partial Area Interpretations
36 Other Identities
38 Sensitivity
39 Infiltration
Infiltration Forms
40 Alternative Origins
Basic Conflicts
Equivalences
41 Soil Groups
44 Intial Abstraction
45 Investigations of I[sub(a)]/S
Effects of Alternative λ
46 Conjugate CNs
47 Effects on Hydrographs
Soil Moisture Repesentation and AMC/ARC
Prior 5-Day Rainfall Depths
AMC Conversion Values
48 Double Normal Plotting
49 AMC and ARC as “Error Bands”
50 Curve Numbers and Soil Moisture Modeling
52 Other CN Effects
Soil Moisture Effects on Direct Runoff
53 Storm Effects—Intensity, Distribution, and Duration
CN and Direct Runoff Variation
54 Seasonal Effects
Slope Effects
55 Land Use Effects
Effects of Drainage Area
Regional/Climatic Variations
56 Calibration Methods
Needs and Opportunities
57 NEH4 Method
Data Considerations
62 Least Squares Method
Asymptotic Method
64 Distribution Matching Method
Fitting to Continuous and Event Hydrograph Models
65 CNs from Rainfall Simulation Plots
66 Summary
67 Methods Comparisons
Performance Comparisons
CN Table Comparisons
68 Green-Ampt Comparisons
69 Comparison with Rational Method
Multiple Comparisons
70 Applications to/with Remote Sensing and GIS
71 Current Usage and Professional Practice
Authority
72 Myths, Misunderstandings, Misapplications, and Misconceptions
75 Creativity in Professional Practice
76 Critique
77 IV: SUMMARY, CONCLUSION, DISCUSSION and RECOMMENDATIONS
Summary and Conclusions
Origins
Evolution
Adaptation and Survival
78 General Hydrology
Current Status
79 Discussion
Is It Science?
80 Does It “Work”?
81 Can It Be Replaced?
Can It Be Improved?
Recommendations
82 Keeper
Information Exchange
Reconfiguring I[sub(a)]/S
Curve Numbers in Continuous Modeling Systems
Remote Sensing
83 Local Calibrations
Climatic Adjustments
Infiltration Associations
Non-CN Situations
Forested Watersheds
Land Management Applications
84 Hydrologic Soil Groups
Epilogue
85 Appendix I: Solutions to the Curve Number Equation
86 Appendix II: List of Symbols and Acronyms
88 References Cited
110 Other Literature
116 Index
A
C
E
F
G
H
I
117 L
M
N
P
R
S
W
ASCE 9780784410042 2009
$41.71