Blue (Volusia County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 29°1'58", Longitude 81°16'7"
Period of record: 37 sampling dates; November 30, 1991 to December 6, 1999
Surface area (Shafer et al. 1986): 55 acres / 22 hectacres
Lake Region (Griffith et al. 1997): Eastern Flatlands
Geologic formation (Brooks 1981):
The geology is dominated by coastal sand and shelly silty sand of the preglacial Pleistocene.
Physiographic region (Brooks 1981):
The water body lies in the St. John’s Offset division of the Central Lake District.
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 37 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
14 |
33 |
56 |
|
Long-term total nitrogen concentrations (µg/L) |
690 |
1030 |
1390 |
|
Long-term total chlorophyll concentrations (µg/L) |
2.0 |
15.7 |
58.3 |
|
Long-term Secchi depth (ft) |
2.0 |
3.8 |
7.5 |
1999 Florida LAKEWATCH Data
Numbers reported below are monthly averages calculated from 3 stations for total phosphorus (TP, µg/L), total nitrogen (TN, µg/L), chlorophyll (CHL, µg/L) and Secchi depth (SECCHI, ft) during 1999:
|
Date |
TP (µg/L) |
TN (µg/L) |
CHL (µg/L) |
SECCHI (ft |
|
Jan-06-99 |
16 |
740 |
2.0 |
. |
|
Feb-08-99 |
14 |
690 |
2.7 |
6.9 |
|
Mar-10-99 |
17 |
690 |
2.3 |
7.5 |
|
Apr-05-99 |
21 |
710 |
2.7 |
7.0 |
|
May-10-99 |
22 |
820 |
3.3 |
. |
|
Jun-08-99 |
22 |
780 |
3.0 |
. |
|
Jul-09-99 |
25 |
770 |
3.0 |
. |
|
Aug-09-99 |
30 |
960 |
15.0 |
5.5 |
|
Sep-07-99 |
42 |
1080 |
18.5 |
5.0 |
|
Oct-03-99 |
34 |
1100 |
21.0 |
4.6 |
|
Nov-07-99 |
31 |
1160 |
13.7 |
4.3 |
|
Dec-06-99 |
32 |
1080 |
14.0 |
3.7 |
|
|
|
|
|
|
|
1999 Average |
26 |
880 |
8.4 |
5.6 |
Blue (Volusia County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on July 30, 1992
|
Percent area covered with aquatic vegetation (PAC, %) |
58 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
14 |
|
Average emergent plant biomass (kg wet wt/m2) |
3.1 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
5.8 |
|
Average submersed plant biomass (kg wet wt/m2) |
4.7 |
|
Average width of emergent and floating-leaved zone (ft.) |
25 |
|
Average lake depth (m) |
2 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
southern naiad |
Najas guadalupensis |
100 |
|
coontail |
Ceratophyllum demersum |
80 |
|
floating water-hyacinth |
Eichhornia crassipes |
70 |
|
alligator-weed |
Alternanthera philoxeroides |
70 |
|
sedge family |
Cyperaceae |
60 |
|
water primrose |
Ludwigia octovalvis |
60 |
|
common salvinia |
Salvinia rotundifolia |
40 |
|
spatterdock |
Nuphar luteum |
40 |
|
water-pennywort |
Hydrocotyle umbellata |
40 |
|
willow |
Salix spp. |
20 |
|
giant bulrush |
Scirpus californicus |
20 |
|
slender spikerush |
Eleocharis baldwinii |
10 |
|
parrot's-feather |
Myriophyllum aquaticum |
10 |
|
red ludwigia |
Ludwigia repens |
10 |
|
cat-tail |
Typha spp. |
10 |
|
Brazilian elodea |
Egeria densa |
10 |
|
buttonbush |
Cephalanthus occidentalis |
10 |
|
sawgrass |
Cladium jamaicense |
10 |
|
torpedograss |
Panicum repens |
10 |
|
soft rush |
Juncus effusus |
10 |
|
red root |
Lachnanthes caroliniana |
10 |