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Quantification of Landscape Indicators/Aquatic Resource Associations in the Savannah River Basin
VARIABLE DESCRIPTION USED IN STATISTICAL ANALYSES
Table 1.
Water chemical-biological and landscape metrics used in the statistical
analyses. Letters "c" and "p" denote variables included
in canonical and PLS analyses.
|
Variable Type/Name |
Description
|
|
|---|---|---|
 |
||
| Water Chemical Metrics |  |
|
| |
||
| pH
(c) |
pH
|
|
| |
||
| EC
(c) |
Electrical Conductivity, microSiemens per centimeter
(FS/cm)
|
|
| |
||
| DO
(c) |
|
Dissolved Oxygen, mg per liter
|
| |
||
| |
|
|
| |
||
|
Water Biological Metrics
|
|
|
| |
||
| Hab
(c,p) |
|
Macroinvertebrate habitat.
|
| |
||
| EPT
(c,p) |
|
Taxa richness of sensitive insects to pollution;
EPT stands for Ephemeroptera-Plecoptera-Trichoptera Index. These
insects are correlated with good water quality (Lenat, 1987) based
on 100-organism subsample, non-impacted (>10), slightly impacted
(6-10), moderately impacted (2-5) and severely impacted (0-1).
|
| |
||
| Rich
(c,p) |
|
Macroinvertebrate richness, species richness (SPP).
Total number of species in a sample. Condition of areas are classified
as: non impacted (>26), slightly impacted (19-26), moderately
impacted (11-18), severely impacted (<11).
|
| |
||
| AGPT
(c,p) |
|
Algal Growth Potential Test
|
| |
||
| IBI
(c,p) |
|
Fish Index of Biotic Integrity (Karr, 1981)
|
| |
||
| |
|
|
| |
||
|
Landscape Metrics |
|
Percent area in a HUC
|
| |
||
| Pct_crop
(c,p) |
|
Percentage of total MRLC landcover in row crops
types
|
| |
||
| Pct_past
(c,p) |
|
Percentage of total MRLC landcover in pasture/grassland
types
|
| |
||
| Pct_wtr
(c,p) |
|
Percentage of total MRLC landcover in water types
|
| |
||
| Pct_wet
(c,p) |
|
Percentage of total MRLC landcover in wetland types
|
| |
||
| Pct_bar
(c,p) |
|
Percentage of total MRLC landcover in barren types
(quarries, strip mines)
|
| |
||
| Pct_urb
(c,p) |
|
Percentage of total MRLC landcover in urban types
|
| |
||
| Pct_for
(c,p) |
|
Percentage of total MRLC landcover in forest types
|
| |
||
| Crop_slp
(c,p) |
|
Percent of total area in row crops on slopes greater
than 3 percent
|
| |
||
| Crop_slp_mod
(c,p) |
|
Percent of total area in row crops on slopes greater
than 3 percent and on moderately erodible soils (STATSGO K-factor
$ 0.2 and < 0.4)
|
| |
||
| Ag_hi
(c,p) |
|
Percent of total area in agriculture (row crops
+ pasture) on highly erodible soils (STATSGO K-factor $
0.4)
|
| |
||
| Ag_slp
(c,p) |
|
Percent of total area in agriculture (row crops+pasture)
on slopes greater than 3 percent
|
| |
||
| Ag_slp_hi
(c,p) |
|
Percent of total area in agriculture (row crops
+ pasture) on slopes greater than 3 percent and on highly erodible
soils (STATSGO K-factor $ 0.4)
|
| |
||
| Ag_mod
(c,p) |
|
Percent of total area in agriculture (row crops
+ pasture) on moderately erodible soils (STATSGO K-factor $
0.2 and < 0.4)
|
| |
||
| Ag_slp_mod
(c,p) |
|
Percent of total area in agriculture (row crops
+ pasture) on slopes greater than 3 percent and on moderately erodible
soils (STATSGO K-factor $ 0.2 and <
0.4)
|
| |
||
| Past_slp
(c,p) |
|
Hay pasture on slopes greater than 3 percent
|
| |
||
| Bar_slp_hi
(c,p) |
|
Percent of total area in barren cover types on slopes
greater than 3 percent and on highly erodible soils (STATSGO K-factor
$ 0.4)
|
| |
||
| Bar_slp_mod
(c,p) |
|
Barren on slopes > 3% and on moderately erodible
soils
|
| |
||
| Soil_er
(c,p) |
|
Percent of total area with highly erodible soils
(STATSCO K-factor $0.4)
|
| |
||
| Mean_slp
(c) |
|
Mean or average percent slope
|
| |
||
| Slope3
(c,p) |
|
1 Percent of total area with slopes greater than
3 percent
|
| |
||
| Slp_mod
(c,p) |
|
Percent of total area with moderately erodible soils
(STATSGO K-factor $ 0.2 and < 0.4)
and slope greater than 3 percent
|
| |
||
| Sd_slp
(c) |
|
Standard deviation of percent slope
|
| |
||
| Strmden
(c,p) |
|
Stream density as total length of streams from USGS
TIGER data
|
| |
||
| Totroad30
(c,p) |
|
Total length of type 1 (interstate) roads within
30 m of streams from USGS TIGER data
Total length of type 2 (interstate) roads within 30 m of streams from USGS TIGER data Total length of type 3 (interstate) roads within 30 m of streams from USGS TIGER data Total length of type 4 (interstate) roads within 30 m of streams from USGS TIGER data Total length of railroads within 30 m of streams from USGS TIGER data Total length of railroad sidings within 30 m of streams from USGS TIGER data |
| |
||
| TotroadWs
(c,p) |
|
Total length of type 1 (interstate) roads from USGS
TIGER data
Total length of type 2 (interstate) roads from USGS TIGER data Total length of type 3 (interstate) roads from USGS TIGER data Total length of type 4 (interstate) roads from USGS TIGER data Total length of type 0 (trails) roads from USGS TIGER data |
| |
||
| PwrPipTl
(c,p) |
|
Total length of power lines within 30 m of streams
from USGS TIGER data
Total length of pipe lines within 30 m of streams from USGS TIGER data Total length of telephone lines from USGS TIGER data |
| |
||