ENVIRNOMENTAL - Interpreting Existing site/envirn. conditions Flashcards
Catchment Areas aka market, trade, or tributary area
geographic area from which
the participants in an activity are drawn. It grows and shrinks with the activity.
Residential Catchment Areas
determined by local transit systems.
Proctor Compaction Test
Geotechnical tests to determine the maximum, practically achievable, density of soils and aggregates.
Percolation test
test method to determine the rate at which soil absorbs effluent. Used
to test suitably of soil for a leachfield.
Survey - Baseline
parallel (line that follows latitudes of earth) used as the basis for the east‐
! west layout of the US Survey system
Survey - Parallels
parallels between the baselines in the US Survey
Survey - Principle Meridian
meridian (north-south line that follows longitude of earth) that
! serves as the basis for the north‐south grid layout of the US Survey
Survey - Guide Meridian
meridians between the principal meridians
Survey - Benchmark
standard or point of reference against which things may be compared
Survey - Metes and Bounds
verbal description of land that begins at a known point and
describes the bearing and length of each side of the property until the point of the
beginning is reached
Topography - Contour Intervals
change in elevation between two contours. Smaller scaled maps typically have a larger interval for clarity.
Topography - Crown/Ridge
contours point “down” toward the lower elevation
Topography - Swale/valley
contours point “up” towards the higher elevation
Topography - Hill
concentric circles with elevations getting higher towards the center
Topography - Depression
concentric circles with the elevations getting lower towards the center