Spatial Analysis of Atrazine in the Elm Fork Watershed Page: 36
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and for concentrations in lakes and long-term precipitation. Figure 11 is a sample plot of
the Atrazine concentrations found at Little Elm Creek and the precipitation accumulated
during the previous three and 10 days. Figure 12 is a sample plot of the concentrations
found in Lake Lewisville and the accumulated precipitation during the previous 30 and
90 days. There was also no relationship between mean, median, and log-transformed
values and precipitation.
Figure 11-Plots of stream sample Atrazine concentration and short-term precipitation
Station 21 [Atrazine] vs 3-Day Station 21 [Atrazine] vs 10-Day
Precipitation Accumulation Precipitation Accumulation
14 -14
Q Q
.- 12 -- 12
NN
S 10 , 10
8, 6 8, 6
c4 "L 6 ,- N " 6
o 4 o 4
. 2 . 2
0i i ii 0ii
0 0
0 0.05 0.1 0.15 0.2 0.25 0 0.5 1 1.5 2 2.5
3-Day Precipitation (inches) 10-Day Precipitation (inches)
Figure 12-Plots of lake sample Atrazine concentration and long-term precipitationStation 16 [Atrazine] vs 30-Day
Precipitation AccumulationQ 0.9
0.8
m 0.7
0..--0.6
~ '0.5
- 0.4
o 0.3
0.2
0.1
0O
00 1 2 3 4 5 6
30-Day Precipitation (inches)Q 0.9
S 0.8
0.7
0--. "0.6
,0.5
,0.4
0.3
0.2
0.1
0Station 16 [Atrazine] vs 90-Day
Precipitation Accumulation5 10
90-Day Precipitation (inches)15
36
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Ochandio, Mario Roberto. Spatial Analysis of Atrazine in the Elm Fork Watershed, thesis, May 2000; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc2510/m1/38/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .