Hydrologic Soil Group (HSG) definition

Hydrologic Soil Group (HSG) means a Natural Resource Conservation Service Classification System in which soils are categorized into four (4) runoff potential groups. The groups range from group A soils, with high permeability and little runoff produced, to group D soils, which have low permeability rates and produce much more runoff.
Hydrologic Soil Group (HSG) means categories representing soil infiltration rates affected by subsurface permeability as well as surface intake rates. Soils are classified into four HSGs (A, B, C, and D) according to their minimum infiltration rate, which is obtained for bare soil after prolonged wetting. The Natural Resources Conservation Service (NRCS) of the United States Department of Agriculture defines the four groups and provides a list of most of the soils in the United States and their group classification. The soils in the area of interest may be identified from a soil survey report, which can be obtained from the local NRCS office or the Dauphin County Conservation District office.
Hydrologic Soil Group (HSG) means a Natural Resource Conservation

Examples of Hydrologic Soil Group (HSG) in a sentence

  • Hydrologic Soil Group (HSG) – Infiltration rates of soils vary widely and are affected by subsurface permeability as well as surface intake rates.

  • Hydrologic Soil Group (HSG) - Infiltration rates of soils vary widely and are affected by subsurface permeability as well as surface intake rates.

  • Underlying soils of Hydrologic Soil Group (HSG) C or D should be adequate to maintain a permanent pool.

  • Hydrologic Soil Group (HSG) – A classification of soils by the Natural Resources Conservation Service (NRCS), into four (4) runoff potential groups.

  • Similar measures shall be taken to control the post-development runoff volume to infiltrate the groundwater recharge volume GRV according to the following ratios of Hydrologic Soil Group (HSG) type versus infiltration rate multiplier: HSG-A: 1.0; HSG-B: 0.75; HSG-C: 0.4; HSG-D: 0.15.

  • Stormwater volume control shall mitigate the increase in the post-development runoff volume to infiltrate the groundwater recharge volume GRV according to the ratios of Hydrologic Soil Group (HSG) type versus infiltration rate multiplier (see attached Stormwater Design Criteria Table).

  • Soil infiltration tests need to be conducted at proposed pond sites to estimate infiltration rates, which can be significant in Hydrologic Soil Group (HSG) A soils and some group B soils.

  • The infiltration practice shall not be used in Hydrologic Soil Group (HSG) D soils without soil corrections.

  • Similar measures shall be taken to control the post-development runoff volume to infiltrate the groundwater recharge volume GRV according to the following ratios of Hydrologic Soil Group (HSG) type versus infiltration rate multiplier: HSG-A: 0.4; HSG-B: 0.25; HSG-C: 0.1; HSG-D: 0.00.

  • Site Cover Runoff Coefficients (Rv)Soil ConditionRunoff CoefficientForest Cover0.02 to 0.05*Disturbed Soils/Managed Turf0.15 to 0.25*Impervious Cover0.95*Range dependent on original Hydrologic Soil Group (HSG) Forest A: 0.02 B: 0.03 C: 0.04 D: 0.05Disturbed Soils A: 0.15 B: 0.20 C: 0.22 D: 0.25 Figure 3.


More Definitions of Hydrologic Soil Group (HSG)

Hydrologic Soil Group (HSG) means a Natural Resource Conservation Service classification system in which soils are categorized into four runoff potential groups. The
Hydrologic Soil Group (HSG) has the meaning used in the runoff calculation methodology promulgated by the United States Natural Resources Conservation Service Engineering Field Manual for Conservation Practices.
Hydrologic Soil Group (HSG) means a Natural Resource Conservation Service classification system in which soils are categorized into four runoff potential groups. The groups range from group A soils, with high permeability and little runoff produced, to group D soils, which have low permeability rates and produce much more runoff. “Impaired Waters” means those streams, rivers, lakes, estuaries and other water bodies that currently do not meet their designated use classification and associated water quality standards under the Clean Water Act.
Hydrologic Soil Group (HSG) means a Natural Resource Conservation Service classification system in which soils are categorized into four runoff potential groups. The groups range from A soils, with high permeability and little runoff production, to D soils, which have low permeability rates and produce much more runoff. “Impervious Cover” means a surface composed of any material that significantly impedes or prevents natural infiltration of water into soil. Impervious surfaces include, but are not limited to, roofs, buildings, streets, parking areas, and any concrete, asphalt, or compacted gravel surface.
Hydrologic Soil Group (HSG) means a Natural Resource Conservation Service classification system in which soils are categorized into four runoff potential groups. The groups range from group A soils, with high permeability and little runoff produced, to group D soils, which have low permeability rates and produce much more runoff. “Impervious Cover” means a surface composed of any material that greatly impedes or prevents the natural infiltration of water into soil. Impervious surfaces include, but are not limited to, rooftops, buildings, streets and roads, and any concrete or asphalt surface, except those designed specifically to allow infiltration.

Related to Hydrologic Soil Group (HSG)

  • Environmental Management Plan or “EMP” means the environmental management plan for the Project, including any update thereto, incorporated in the IEE;

  • Hydric soil means a soil that formed under conditions of saturation, flooding, or ponding long enough during the growing season to develop anaerobic conditions in the upper part.

  • Hydroelectric energy means water used as the sole source of energy to produce electricity.

  • Storm water management plan means a comprehensive plan designed to reduce the discharge of pollutants from storm water after the site has under gone final stabilization following completion of the construction activity.

  • Soda fountain means a place especially equipped

  • mean high water springs or “MHWS” means the highest level which spring tides reach on average over a period of time;

  • Forest means an area of land defined by the minimum values for area size, tree crown cover or an equivalent stocking level, and potential tree height at maturity at the place of growth of the trees as specified for each Member State in Annex II. It includes areas with trees, including groups of growing, young, natural trees, or plantations that have yet to reach the minimum values for tree crown cover or an equivalent stocking level or minimum tree height as specified in Annex II, including any area that normally forms part of the forest area but on which there are temporarily no trees as a result of human intervention, such as harvesting, or as a result of natural causes, but which area can be expected to revert to forest;

  • Virginia Stormwater Management Program or “VSMP” means a program approved by the State Board after September 13, 2011, that has been established by a locality to manage the quality and quantity of runoff resulting from land-disturbing activities and shall include such items as local ordinances, rules, permit requirements, annual standards and specifications, policies and guidelines, technical materials, and requirements for plan review, inspection, enforcement, where authorized in this article, and evaluation consistent with the requirements of this article and associated regulations.

  • Cropland means land used for the production of adapted crops for harvest, alone or in a rotation with grasses and legumes, and includes row crops, small grain crops, hay crops, nursery crops, orchard crops, and other similar specialty crops.

  • Stormwater management plan means the set of drawings and other documents that comprise all the information and specifications for the programs, drainage systems, structures, BMPs, concepts and techniques intended to maintain or restore quality and quantity of stormwater runoff to pre-development levels.

  • ESBD means the Electronic State Business Daily, the electronic marketplace where State of Texas bid opportunities over $25,000 are posted. The ESBD may currently be accessed at http://www.txsmartbuy.com/sp.

  • Pest Management Plan and “PMP” means the Recipient’s plan dated December 13, 2010, which: (i) addresses the concerns relating to the Project risks associated with potential increases in the use of pesticides for agricultural production, intensification and diversification and controlling disease vector populations arising from irrigation schemes; (ii) sets forth mitigation and monitoring measures to be taken during Project implementation and operation to eliminate adverse environmental and social impacts, offset them, or reduce them to acceptable levels; (iii) recommends institutional measures to strengthen national capacities to implement the mitigation and monitoring measures; and (iv) as part of the implementation arrangements, identifies national agencies and other partners that could play a vital role in the success of the Project.

  • Transportation Company means any organization which provides its own or its leased vehicles for transportation or which provides freight forwarding or air express services.

  • Group health plan means an employee welfare benefit plan as defined in section 3(1) of subtitle A of title I of the employee retirement income security act of 1974, Public Law 93-406, 29 USC 1002, to the extent that the plan provides medical care, including items and services paid for as medical care to employees or their dependents as defined under the terms of the plan directly or through insurance, reimbursement, or otherwise.

  • IMS means IMS Health Incorporated.

  • foreshore , in relation to a port, means the area between the high-water mark and the low-water mark relating to that port;

  • COVID-19 means SARS-CoV-2 or COVID-19, and any evolutions thereof or related or associated epidemics, pandemic or disease outbreaks.

  • coronavirus means severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2);

  • minibus means any motor vehicle having a seating capacity of not less than seven nor more than

  • IOSCO means the International Organisation of Securities Commissions.

  • Navigable waters ’ means the waters of the United States, including the territorial sea;

  • ITT has the meaning given to it in the recitals to this Framework Agreement;

  • LSD means lysergic acid diethylamide.

  • Virginia Stormwater Management Act means Article 2.3 (§ 62.1-44.15:24 et seq.) of Chapter 3.1 of Title 62.1 of the Code of Virginia.

  • Nuclear medicine technologist means an individual who holds a current certification with the American Registry of Radiological Technologists or the Nuclear Medicine Technology Certification Board.

  • Stormwater management planning area means the geographic area for which a stormwater management planning agency is authorized to prepare stormwater management plans, or a specific portion of that area identified in a stormwater management plan prepared by that agency.