Site Inventory - Physical Attributes Flashcards
Site Reconnaissance
- identifies site assets and liabilities
- includes aerial inspection, oblique aerial photos of the site which can provide contextual information.
Site Attributes
- Vegetation on Slope, are unevenly distributed over the landscape
- Average seasonal temperatures & precipitation, show little spatial variation at site scale
- Temporal variation may influence the site from season to season.
- Site inventory maps documents the spatial distribution of a particular attribute at more than one time of year.
Housing Density
of dwelling units allowed per unit area (acre or hectare)
3 Keys Attribute Maps
Elevation, Slope and Aspect
*three fundamental landform components
Elevation Map
typically portrayed as contour lines on topographic maps, effective way to visualize topographic relief is creating a chloropleth map.
Chloropleth Map
a map that uses differences in shading, coloring, or the placing of symbols within predefined areas to indicate the average values of a property or quantity in those areas.
Slope Map
Landforms and slopes are the result of constructional process (deposition) and destructional process (erosion) acting on geologic structures.
Aspect Map
A slopes orientation/aspect is the direction the slope faces. (downhill slope of the terrain)
Surficial Geology
is concerned with structure, composition and in some locations - at the earths surface. *attribute: depth to bedrock
Bedrock Geology
has a persistent effect on landforms, due to different rates of weathering that occurs on the soil parent materials.
Natural processes that involve rock fragmentation and weathering:
Soil formation, soil erosion, and soil deposition
Hydrology
The upper surface of a saturated area, the water table, generally mirrors the surface terrain.
Without mitigation, urban development can have significant impacts on local and regional hydrology, including:
- Increased volumes and rates of runoff discharge
- Reduced time needed for runoff to reach surface waters
- Increased frequency and severity of flooding
- Reduced streamflow during prolonged periods of dry weather.
Hydrology Attributes
Water management, infiltration, storage and discharge
Soil Physical Factors
Climate, Parent Material, Landform Position