WSP06426

• File Number: 8407
• Description: Platte River Basin - River Basin General Publications
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 1/1/1980
• Author: USGS
• Title: Hydrologic Data from Upper Grange Hall Creek Basin - Northglenn - Adams County - Colorado
• Water Supply Pro - Doc Type: Report/Study

r,OO.lSl

fecal-coliform bacteria.--Bact~ria that are present in the
warmblooded animals. They are often used as indicators
ityof the water.
impervious.--Permitting percolation (or infi ltration) of water,
sidewalks, roofs. and paved parking lots.
impervious. effective.--lmpervious and connected to drainage conveying the runoff
out of the area, such as roofs which drain onto driveways. streets. side-
walks, and paved parking lots.
impervious. noneffective.--lmpervious but draining
roofs which drain onto lawns.
land use.--The physical characteristics of the land surface
ties associated with the land surface.
major ions.--Chemical ions usually present in natural water at concentrations
greater than 1 milligram per I iter.
nutrients.--Elements or compounds that are required for growth,
carbon, and phosphorus.
pervious.--Allowing percolation
fields of porous material.
pesticides.--Chemical compounds used to control undesirable plants and animals.
Major categories of pesticides include insecticides. miticides. fungicides.
herbicides, and rodenticides. Insecticides and herbicides. which control in-
sects and plants respectively. are the twO categories reported.
polychlorinated biphenyls (PCB's).--lndu5trial chemicals that are mixtures of
chlorinated biphenyl compounds having various percentages of chlorine. These
compounds are similar in structure to organochlorine insecticides.
rainfall runoff.--Flow in streams coming directly from surface runoff of rainfall.
sediment.--Sol id material that originates mostly from disintegrated rocks and is
transported by. suspended in, or deposited from water; it includes chemical
and biochemical precipitates and decomposed organic material. such as humus
(complex molecules formed by partial decomposition of plant or animal mat-
ter). The quantity. characteristics. and cause of the occurrence of sediment
in streams are influenced by environmental factors. Some major factors are
degree of slope, length of slope. soil characteristics. land usage. and quan-
tity and intensity of precipitation.
snowmelt runoff.--Flow in streams coming directly
snow.
subbasin.--See drainage subbasin.
suspended sediment.--The sediment that at any given time is maintained in suspen-
sion by the upward components of turbulent currents or that exists in suspen-
sion as a colloid. A colloid is a particle loJhich is not dissolved (too large
to pass through a semipermeable membrane). but which wi II not settle out of
solut ion.
storage rain gage.--A gage in which accumulated rain is proportional to the level
of a float in a storage reservoir.
storm runoff.--Rainfall or snowmelt runoff.
tipping-bucket rain gage.--A gage that repetitively measures a fixed amount of
rain by means of a bucket or pan that empties each time rain fi lis it.
trace elements.--Elements usually present in natural water at concentrations less
than 1 milligram per liter.

intestine or feces of
of the sanitary qual-

such as streets.

to a pervious area.

such

as

and the human activi-

such as nitrogen.

(or infi Itration)

of water.

such

as lawns

and

from surface runoff

of mel ted

v

-