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Azienda News:
- Chapter 7 Hydrologic Soil Groups - USDA
curve numbers are used to estimate direct runoff from rainfall (NEH630 10) A map unit is a collection of areas defined and named the same in terms of their soil components or miscel-laneous areas or both (NSSH 627 03) Soil scientists assign map unit components to hydrologic soil groups Map unit components assigned to a specific hydrologic
- Global Hydrologic Soil Groups (HYSOGs250m) for Curve Number-Based . . .
Hydrologic soil groups (HSGs) are a fundamental component of the USDA curve number (CN) method for estimation of rainfall runoff; yet these data are not readily available in a format or spatial resolution suitable for regional to global scale modeling applications
- TR-55 Curve Number Tables - Washington State Department of Transportation
4B-2 Runoff curve numbers for selected agricultural, suburban, and rural areas (western Washington) For a more detailed and complete description of land use curve numbers, refer to Chapter Two (2) of the Soil Conservation Service’s Technical Release No 55 (210-VI-TR-55, Second Ed , June 1986)
- Curve Number Table: Soil and Water Health Best Practices
Soils are categorized into four hydrologic soil groups (A, B, C, and D) based on infiltration characteristics Group A soils have high infiltration rates and low runoff potential, while Group D soils exhibit the opposite
- Stormwater runoff coefficients curve numbers for different land uses
Curve numbers for antecedent moisture condition II (Source USDA-NRCS) The following table was adapted from Hydrologic Analysis and Design (4th Edition) (McCuen, 2017) Runoff coefficients for different soil groups and slopes Coefficients are for recurrence intervals less than 25 years
- Appendix D – NRCS Table of Curve Numbers Time of Concentration Calculati
Table 2-2a Runoff curve numbers for urban areas 1 Curve numbers for----- Cover description ----- -----hydrologic soil group -----Average percent Cover type and hydrologic condition impervious area 2 ABC D Fully developed urban areas (vegetation established)
- TABLE 1 Runoff Curve Numbers [From NRCS (SCS) TR-55] HYDROLOGIC SOIL . . .
Source: Rawls, W J , S L Wong and R H McCuen, 1981, “Comparison of Urban Flood Frequency Procedures”, Preliminary Draft, U S Department of Agriculture, Soil Conservation Service, Baltimore, MD
- Global Hydrologic Soil Groups (HYSOGs250m) for Curve Number-Based . . .
This dataset - HYSOGs250m - represents a globally consistent, gridded dataset of hydrologic soil groups (HSGs) with a geographical resolution of 1 480 decimal degrees, corresponding to a projected resolution of approximately 250-m These data were developed to support USDA-based curve-number runoff modeling at regional and continental scales
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