Yale (Lake County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°54'43", Longitude 81°44'8"
Period of record: 26 sampling dates; May 10, 1990 to December 19, 1999
Surface area (Shafer et al. 1986): No data available.
Lake Region (Griffith et al. 1997): Central Valley
Geologic formation (Brooks 1981):
The geology is dominated by deeply weathered clayey sand and granular sand of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Central Lakes division of the Central Lake District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 4 months sampled:
|
pH |
8.4 |
Sulfate (mg/L) |
7.0 |
|
Total alkalinity (mg/L as CaCO3) |
114.8 |
Calcium (mg/L) |
27.4 |
|
Conductance (µS/cm @ 25 °C) |
284 |
Magnesium (mg/L) |
45.2 |
|
Color (Pt-Co units) |
8 |
Sodium (mg/L) |
20.1 |
|
Chloride (mg/L) |
26.4 |
Potassium (mg/L) |
3.6 |
|
Silicon (mg/L) |
1.3 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 26 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
9 |
22 |
34 |
|
Long-term total nitrogen concentrations (µg/L) |
660 |
1290 |
1990 |
|
Long-term total chlorophyll concentrations (µg/L) |
4.0 |
28.5 |
60.0 |
|
Long-term Secchi depth (ft) |
1.6 |
4.1 |
11.0 |
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-21-99 |
22 |
1470 |
35.7 |
1.9 |
|
Feb-24-99 |
21 |
1520 |
30.3 |
2.0 |
|
Mar-24-99 |
23 |
1440 |
19.0 |
2.3 |
|
Apr-26-99 |
31 |
1670 |
35.7 |
1.8 |
|
May-25-99 |
30 |
1990 |
50.3 |
1.8 |
|
Jun-22-99 |
24 |
1480 |
40.0 |
2.2 |
|
Jul-24-99 |
21 |
1590 |
43.0 |
2.0 |
|
Aug-26-99 |
23 |
1720 |
44.0 |
1.9 |
|
Sep-24-99 |
26 |
1690 |
55.3 |
1.8 |
|
Oct-23-99 |
30 |
1620 |
59.0 |
1.8 |
|
Nov-29-99 |
34 |
1970 |
60.0 |
1.7 |
|
Dec-19-99 |
31 |
1860 |
58.7 |
1.6 |
|
|
|
|
|
|
|
1999 Average |
26 |
1670 |
44.2 |
1.9 |
Yale (Lake County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on July 14, 1994
|
Percent area covered with aquatic vegetation (PAC, %) |
42 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
10 |
|
Average emergent plant biomass (kg wet wt/m2) |
1.1 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
0.7 |
|
Average submersed plant biomass (kg wet wt/m2) |
3.5 |
|
Average width of emergent and floating-leaved zone (ft.) |
78 |
|
Average lake depth (m) |
3 |
Frequency that plant species occur in 15 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
knot grass |
Paspalum distichum |
100 |
|
maidencane |
Panicum hemitomon |
93 |
|
duck-potato |
Sagittaria lancifolia |
87 |
|
lemon bacopa |
Bacopa caroliniana |
87 |
|
tapegrass |
Vallisneria americana |
87 |
|
willow |
Salix spp. |
73 |
|
buttonbush |
Cephalanthus occidentalis |
60 |
|
water primrose |
Ludwigia octovalvis |
53 |
|
musk-grass |
Chara spp. |
53 |
|
cat-tail |
Typha spp. |
47 |
|
wax myrtle |
Myrica cerifera |
47 |
|
rush fuirena |
Fuirena scirpoidea |
40 |
|
fragrant water-lily |
Nymphaea odorata |
33 |
|
sawgrass |
Cladium jamaicense |
33 |
|
Illinois pondweed |
Potamogeton illinoensis |
27 |
|
torpedograss |
Panicum repens |
20 |
|
southern naiad |
Najas guadalupensis |
13 |
|
bladderwort |
Utricularia foliosa |
13 |
|
common salvinia |
Salvinia rotundifolia |
7 |
|
spatterdock |
Nuphar luteum |
7 |
|
water-pennywort |
Hydrocotyle umbellata |
7 |
|
coontail |
Ceratophyllum demersum |
7 |
|
hydrilla |
Hydrilla verticillata |
7 |
|
purple bladderwort |
Utricularia purpurea |
7 |
|
elephant-ear |
Colocasia esculenta |
7 |
|
salt-bush |
Baccharis spp. |
7 |
|
melaleuca |
Melaleuca quinquenervia |
7 |
|
elderberry |
Sambucus canadensis |
7 |