neh4-chap9 - Part 630 Hydrology National Engineering...

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(210-VI-NEH, July 2004) United States Department of Agriculture Natural Resources Conservation Service Part 630 Hydrology National Engineering Handbook Chapter 9 Hydrologic Soil-Cover Complexes Rain clouds Cloud formation Precipitation T r a n s p i t o f m l c e Ocean Ground water Rock Deep percolation Soil Percolation Infiltration Surface runoff E v g Evaporation
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Part 630 National Engineering Handbook Hydrologic Soil-Cover Complexes Chapter 9 (210-VI-NEH, July 2004) Issued July 2004 The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, sex, religion, age, disability, political beliefs, sexual orientation, or marital or family status. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA’s TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write USDA, Director, Office of Civil Rights, Room 326W, Whitten Building, 14th and Independence Avenue, SW, Washington, DC 20250-9410 or call (202) 720-5964 (voice and TDD). USDA is an equal opportunity provider and employer.
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9–i (210-VI-NEH, July 2004) Acknowledgments Chapter 9 was originally prepared by Victor Mockus , retired hydraulic engineer, USDA Soil Conservation Service, and was published in 1964. It was reprinted with minor revisions in 1969. This version was prepared by the Natural Resources Conservation Service (NRCS)/Agricultural Research Service (ARS) Curve Number Work Group and Helen Fox Moody , hy- draulic engineer, NRCS, Beltsville, Maryland. Members of the NRCS/ARS Curve Number Work Group are: Natural Resources Conservation Service Donald E. Woodward (retired) Robert D. Nielsen , soil scientist, Lincoln, Nebraska Robert Kluth (retired) Arlis Plummer , hydraulic engineer, Lincoln, Nebraska Joe Van Mullem (retired) Gary Conaway (retired) Agricultural Research Service William J. Gburek , hydrologist, University Park, Pennsylvania Keith Cooley (retired) Allen T. Hjelmfelt, Jr. (retired) Virginia A. Ferreira (retired) University of Arizona Richard H. Hawkins , Ph.D., professor, Tucson, Arizona
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Part 630 National Engineering Handbook Hydrologic Soil-Cover Complexes Chapter 9 9–ii (210-VI-NEH, July 2004)
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9–iii (210-VI-NEH, July 2004) Chapter 9 Hydrologic Soil-Cover Complexes Contents: 630.0900 General 9–1 630.0901 Determinations of complexes and curve numbers 9–1 (a) Agricultural land . .......................................................................................... 9–1 (b) National and commercial forest: forest-range . .......................................... 9–4 (c) Urban and residential land . ......................................................................... 9–8 630.0902 References 9–14 Tables Table 9–1 Runoff curve numbers for agricultural lands 9–2 Table 9–2 Runoff curve numbers for arid and semiarid rangelands 9–5 Table 9–3 Runoff curve numbers for hydrologic soil-cover 9–6 complexes in Puerto Rico Table 9–4 Runoff curve numbers; tentative estimates for 9–7 sugarcane hydrologic soil-cover complexes in Hawaii Table 9–5 Runoff curve numbers for urban areas 9–9 Figures Figure 9–1 Estimating runoff curve numbers of forest-range 9–4
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This note was uploaded on 12/24/2011 for the course CEE 5734 taught by Professor Moglen during the Spring '11 term at Virginia Tech.

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neh4-chap9 - Part 630 Hydrology National Engineering...

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