Longview Lake
Longview Lake is managed
by the Jackson County
Parks and Recreation Department and is 798 acres in
size. The majority of the
lake’s watershed is considered urban.
Location of Longview Lake
Descriptive statistics for Longview Lake – 2005
Secchi
(inches)
TP
(ug/L)
TN
(ug/L)
CHL
(ug/L)
ISS
(mg/L)
Geometric Mean
36
22
513
11.2
2.9
Minimum
20
17
370
7.9
1.7
Maximum
45
31
760
15.1
8.3
Number of Samples
7
7
7
7
7
Water quality in Longview Lake during 2005 was generally good, with
geometric mean values being lower than the statewide median for chlorophyll. Mean nutrient concentrations were lower in 2005 than observed in
75% of Missouri lakes.
Suspended sediment concentrations and
Secchi transparency geometric means
were near the statewide median. All
parameters showed normal variation
during the sample season.
Relative Rank for
Longview Lake
Secchi
TP
TN
CHL
ISS
6
4
The maximum suspended sediment
value corresponded with the maximum
phosphorus and nitrogen levels; probably a result of a rain event prior to the
early June sampling.
73
2
Longview Lake
Phosphorus
Chlorophyll
Nitrogen
900
30
700
20
500
300
10
Nitrogen (Pg/L)
Phosphorus and
Chlorophyll (Pg/L)
Seasonal fluctuations of parameters for Longview Lake – 2005
100
0
10
8
20
6
30
4
40
50
ISS
Secchi
April
May
June
July
Aug
Sept
Oct
ISS (mg/L)
Secchi (inches)
10
2
0
Phosphorus and Chlorophyll trends in Longview Lake
Chlorophyll concentrations
show no trend either. 2005
chlorophyll concentrations
were very similar to 2004
concentrations in both
magnitude and range.
60
40
20
0
1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005
25
Chlorophyll (ug/L)
While there does not seem
to be a long term phosphorus decrease in Longview
Lake, there have been
fewer observed values
over 40ug/L in the last six
years than in the years
prior.
TP (ug/L)
80
20
15
10
5
0
1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005
74