Hydrologic soil group definition

Hydrologic soil group. (HSG) means a Natural Resource Conservation Service classification in which soils are categorized into 4 runoff potential groups. The groups range from “A” soils with high permeability and little runoff production to “D” soils that have low permeability rates and produce much more runoff.
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Hydrologic soil group means a group of soils having similar runoff.
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Hydrologic soil group means the designation of soils based on the National Engineering Handbook, Part 630, Chapter 7, Hydrologic Soil Groups, U.S. Department of Agriculture, National Resources Conservation Service, 2009 in which soils are categorized into four runoff potential groups, ranging from A soils, with high permeability and little runoff production, to D soils, which have low permeability rates and produce much more runoff.
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Examples of Hydrologic soil group in a sentence

  • Hydrologic soil group A is defined as soils having a high infiltration rate (low runoff potential) when thoroughly wet.

  • Site soils are Indianola loamy sand and classified Hydrologic soil group A.

  • Per the USDA “Natural Resources Conservation Service” the existing soil type for this site is: Chenoa silty clay loam, Hydrologic soil group C.

  • From the curve number table, she identifies that her Hydrologic soil group is D, and for paved parking lots, the curve number CN is 98.

  • The following criteria were used to determine the total runoff and fee structure: Design storm: 3.6 inches in 24 hours (approximately a 5-year rainfall event) Hydrologic soil group: HSG B Typical low density residential lot: 0.275 acre, 38% impervious The typical low density residential lot identified above defines the stormwater utility fee structure’s basic unit, the "Residential Equivalency Factor" (REF).

  • The method listed in the Manual may be used with the following adjustments:• Earth-mounted panels, where any of the solar panel touches the ground, must be considered 100% impervious with a curve number of 98.• Hydrologic soil group must be determined by using the infiltrometer test results (refer to Section 1.2 above).

  • Termination without cause (other than following a change in control) Continued vesting and right to exercise the stock options conditional to the employee conforming to non-competition, non-solicitation and confidentiality covenants for the duration of the vesting and exercise period.

  • If a facility chose to comply with Track II, then the facility would have to demonstrate that alternative technologies would reduce I&E to levels comparable to those that would be achieved with a closed-loop recirculating system (90 percent reduction).

  • Hydrologic soil group A is characterized as having high infiltration rates and therefore low runoff potential.

  • Hydrologic soil group and slope were excluded, and the results were grouped by combinations of land use and land cover (i.e., either pervious or impervious).


More Definitions of Hydrologic soil group

Hydrologic soil group means the classification system for soil erodability set out in Soil Survey — San Diego Area, California (December 1973), issued by the U.S. Department of Agriculture Soil Conservation Service and U.S. Forest Service. In this system soils are categorized into four runoff potential groups. The groups range from "A" soils, which have high permeability and little runoff production, to "D" soils, which have low permeability rates and produce much more runoff.
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Hydrologic soil group means the soils grouped according to their runoff-producing characteristics. The four hydrologic groups are defined in Appendix A of TR-55 and Table 17 of the soil survey.
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Hydrologic soil group means a Natural Resource Conservation Service designation given to different soil types to reflect their relative surface permeability and infiltrative capability. Designations consist of four classifications (A, B, C, and D) grouped according to soil infiltration rates from high infiltration rates in Group A to very low infiltration rates in Group D.
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