Difference between revisions of "Hover box definitions"
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==D== | ==D== | ||
*<span title="Contributing area is defined as the total area, including pervious and impervious surfaces, contributing to a BMP. It is assumed that in most cases, with the exception of green roofs and many permeable pavement systems, impervious surfaces will constitute more than 50 percent of the contributing area to the BMP and that most of this impervious is directly connected."> '''Drainage Area'''</span> | *<span title="Contributing area is defined as the total area, including pervious and impervious surfaces, contributing to a BMP. It is assumed that in most cases, with the exception of green roofs and many permeable pavement systems, impervious surfaces will constitute more than 50 percent of the contributing area to the BMP and that most of this impervious is directly connected."> '''Drainage Area'''</span> | ||
| + | *<span title="the surface and subsurface area surrounding a public water supply well, including the wellhead protection area, that must be managed by the entity identified in a wellhead protection plan. This area is delineated using identifiable landmarks that reflect the scientifically calculated wellhead protection area boundaries as closely as possible."> [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_and_wellhead_protection '''Drinking Water Source Management Area (DWSMA),''']</span> | ||
==E== | ==E== | ||
*<span title="Engineered media is a mixture of sand, fines (silt, clay), and organic matter utilized in stormwater practices, most frequently in bioretention practices. The media is typically designed to have a rapid infiltration rate, attenuate pollutants, and allow for plant growth."> [https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_bioretention#Materials_specifications_-_filter_media '''engineered media''']</span> | *<span title="Engineered media is a mixture of sand, fines (silt, clay), and organic matter utilized in stormwater practices, most frequently in bioretention practices. The media is typically designed to have a rapid infiltration rate, attenuate pollutants, and allow for plant growth."> [https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_bioretention#Materials_specifications_-_filter_media '''engineered media''']</span> | ||
| − | + | *<span title="The part of the wellhead protection area that is defined by a one-year time of travel within the aquifer that is used by the public water supply well (Minnesota Rules, part 4720.5250, subpart 3). It is used to set priorities for managing potential contamination sources within the DWSMA. This area is particularly relevant for assessing impacts from potential sources of pathogen contamination because this time of travel is believed to closely correspond with the survival period of many pathogens."> [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_and_wellhead_protection '''Emergency Response Area.''']</span> | |
==F== | ==F== | ||
| + | *<span title="A geologic formation that contains sufficient fissures, fractures, cracks, joints and faults that yields economic quantities of water to boreholes and springs."> '''fractured flow'''.</span> | ||
==G== | ==G== | ||
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==H== | ==H== | ||
| + | *<span title="Hydraulic conductivity is a property of soils and rocks that describes the ease with which a fluid (usually water) can move through pore spaces or fractures."> '''hydraulic conductivity of the aquifer material (k),'''</span> | ||
| + | *<span title="The hydraulic gradient is the change in total head divided the distance over which the change occurs."> '''hydraulic gradient (i),'''</span> | ||
| + | *<span title="the branch of geology concerned with water occurring underground or on the surface of the earth"> '''hydrogeology'''</span> | ||
==I== | ==I== | ||
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==P== | ==P== | ||
*<span title="Pretreatment reduces maintenance and prolongs the lifespan of structural stormwater BMPs by removing trash, debris, organic materials, coarse sediments, and associated pollutants prior to entering structural stormwater BMPs. Implementing pretreatment devices also improves aesthetics by capturing debris in focused or hidden areas. Pretreatment practices include settling devices, screens, and pretreatment vegetated filter strips."> [https://stormwater.pca.state.mn.us/index.php?title=Pretreatment '''pretreatment''']</span> | *<span title="Pretreatment reduces maintenance and prolongs the lifespan of structural stormwater BMPs by removing trash, debris, organic materials, coarse sediments, and associated pollutants prior to entering structural stormwater BMPs. Implementing pretreatment devices also improves aesthetics by capturing debris in focused or hidden areas. Pretreatment practices include settling devices, screens, and pretreatment vegetated filter strips."> [https://stormwater.pca.state.mn.us/index.php?title=Pretreatment '''pretreatment''']</span> | ||
| + | *<span title="The Prairie du Chien aquifer is the principle aquifer used for drinking water supply in southeast Minnesota. It consists primarily of dolomite. In most areas it is overlain by the St. Peter sandstone, which often acts as a confining bedrock unit. The Jordan sandstone underlies the Prairie du Chien and comprises an important aquifer. The Prairie du Chien and Jordan aquifers are often treated as a single aquifer."> '''Prairie du Chien formation''',</span> | ||
| + | *<span title="Porosity or void fraction is a measure of the void (i.e. empty) spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0% and 100%."> '''porosity (f)'''</span> | ||
==Q== | ==Q== | ||
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*<span title="Sites with shallow bedrock are defined as having bedrock within 6 feet or less of the ground surface. Shallow bedrock is found in many portions of the state, but is a particular problem in the northeastern region."> [https://stormwater.pca.state.mn.us/index.php?title=Shallow_soils_and_shallow_depth_to_bedrock '''shallow depth to bedrock''']</span> | *<span title="Sites with shallow bedrock are defined as having bedrock within 6 feet or less of the ground surface. Shallow bedrock is found in many portions of the state, but is a particular problem in the northeastern region."> [https://stormwater.pca.state.mn.us/index.php?title=Shallow_soils_and_shallow_depth_to_bedrock '''shallow depth to bedrock''']</span> | ||
*<span title="Shallow groundwater is a condition where the seasonal high groundwater table, or saturated soil, is less than 3 feet from the land surface. There is a large portion of the state (more than 50 percent) where the seasonal high water table is located less than 3 feet from the surface."> [https://stormwater.pca.state.mn.us/index.php?title=Shallow_groundwater '''Shallow soils''']</span> | *<span title="Shallow groundwater is a condition where the seasonal high groundwater table, or saturated soil, is less than 3 feet from the land surface. There is a large portion of the state (more than 50 percent) where the seasonal high water table is located less than 3 feet from the surface."> [https://stormwater.pca.state.mn.us/index.php?title=Shallow_groundwater '''Shallow soils''']</span> | ||
| + | *<span title="An Emergency Response Plan defines the actions taken in the initial minutes of an emergency, such as a spill of hazardous material (e.g. gasoline)."> '''spill response plan'''</span> | ||
==T== | ==T== | ||
| + | *<span title="Groundwater travel time is the time it takes for water to move horizontally from one location to another. Travel times are typically calculated using Darcy's equation."> '''travel time'''</span> | ||
==U== | ==U== | ||
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==W== | ==W== | ||
| + | *<span title="The water table is the upper surface of the zone of saturation. The zone of saturation is where the pores and fractures of the ground are saturated with water. ... Below the water table, in the phreatic zone (zone of saturation), layers of permeable rock that yield groundwater are called aquifers."> '''A water table aquifer'''</span> | ||
*<span title="the surface and subsurface area surrounding a well or well field that supplies a public water system, through which contaminants are likely to move toward and reach the well or well field (Minnesota Statutes, section 103I.005, subdivision 24)."> [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_and_wellhead_protection '''Wellhead Protection Areas''']</span> | *<span title="the surface and subsurface area surrounding a well or well field that supplies a public water system, through which contaminants are likely to move toward and reach the well or well field (Minnesota Statutes, section 103I.005, subdivision 24)."> [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_and_wellhead_protection '''Wellhead Protection Areas''']</span> | ||
| + | *<span title="A well log is a record of the measurements of the geologic material (e.g. soil, rocks) penetrated in drilling a well"> [https://stormwater.pca.state.mn.us/index.php?title=Understanding_and_interpreting_soils_and_soil_boring_reports_for_infiltration_BMPs '''well logs''']</span> | ||
==X== | ==X== | ||
Revision as of 12:55, 6 February 2019
This page lists standard definitions used in hover boxes throughout this manual. Hover boxes allow the user to hover over bolded text and see a definition for that text.
Contents
A
B
- bioinfiltration
- bioretention practice
C
D
- Drainage Area
- Drinking Water Source Management Area (DWSMA),
E
F
- fractured flow.
G
H
- hydraulic conductivity of the aquifer material (k),
- hydraulic gradient (i),
- hydrogeology
I
J
K
L
M
N
O
P
- pretreatment
- Prairie du Chien formation,
- porosity (f)
Q
R
S
- Site Location / Minimum Setbacks
- shallow depth to bedrock
- Shallow soils
- spill response plan
T
- travel time
U
V
W
- A water table aquifer
- Wellhead Protection Areas
- well logs