Emma (Lake County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°36'55", Longitude 81°51'8"
Period of record: 107 sampling dates; May 21, 1990 to December 20, 1999
Surface area (LAKEWATCH): 180 acres / 73 hectacres
Lake Region (Griffith et al. 1997): Clermont Uplands
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 Groveland Karst division of the Central Lake District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 2 months sampled:
|
pH |
6.6 |
Sulfate (mg/L) |
6.2 |
|
Total alkalinity (mg/L as CaCO3) |
3.7 |
Calcium (mg/L) |
3.0 |
|
Conductance (µS/cm @ 25 °C) |
101 |
Magnesium (mg/L) |
3.0 |
|
Color (Pt-Co units) |
15 |
Sodium (mg/L) |
9.5 |
|
Chloride (mg/L) |
21.8 |
Potassium (mg/L) |
3.0 |
|
Silicon (mg/L) |
0.4 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 107 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
4 |
9 |
17 |
|
Long-term total nitrogen concentrations (µg/L) |
450 |
630 |
860 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
3.4 |
15.3 |
|
Long-term Secchi depth (ft) |
4.0 |
11.2 |
16.5 |
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-15-99 |
10 |
750 |
4.7 |
9.0 |
|
Feb-24-99 |
7 |
730 |
3.0 |
8.3 |
|
Mar-18-99 |
9 |
680 |
3.0 |
9.0 |
|
Apr-20-99 |
12 |
690 |
2.3 |
8.5 |
|
May-19-99 |
11 |
650 |
4.0 |
8.5 |
|
Jul-15-99 |
8 |
720 |
4.0 |
11.3 |
|
Sep-23-99 |
10 |
580 |
5.3 |
9.8 |
|
Oct-19-99 |
13 |
570 |
4.0 |
12.3 |
|
Nov-20-99 |
9 |
670 |
3.0 |
12.5 |
|
Dec-20-99 |
9 |
530 |
3.0 |
12.5 |
|
|
|
|
|
|
|
1999 Average |
10 |
660 |
3.6 |
10.2 |
Emma (Lake County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on May 21, 1992
|
Percent area covered with aquatic vegetation (PAC, %) |
28 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
3 |
|
Average emergent plant biomass (kg wet wt/m2) |
2.1 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
3.3 |
|
Average submersed plant biomass (kg wet wt/m2) |
3.4 |
|
Average width of emergent and floating-leaved zone (ft.) |
119 |
|
Average lake depth (m) |
4 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
pickerelweed |
Pontederia cordata |
90 |
|
bog-moss |
Mayaca fluviatilis |
90 |
|
maidencane |
Panicum hemitomon |
90 |
|
Florida bladderwort |
Utricularia floridana |
80 |
|
duck-potato |
Sagittaria lancifolia |
70 |
|
bacopa |
Bacopa monnieri |
70 |
|
spatterdock |
Nuphar luteum |
60 |
|
hydrilla |
Hydrilla verticillata |
60 |
|
sawgrass |
Cladium jamaicense |
60 |
|
rush fuirena |
Fuirena scirpoidea |
60 |
|
fragrant water-lily |
Nymphaea odorata |
50 |
|
musk-grass |
Chara spp. |
40 |
|
slender spikerush |
Eleocharis baldwinii |
30 |
|
banana-lily |
Nymphoides aquatica |
30 |
|
water-pennywort |
Hydrocotyle umbellata |
30 |
|
torpedograss |
Panicum repens |
30 |
|
bladderwort |
Utricularia foliosa |
30 |
|
tapegrass |
Vallisneria americana |
20 |
|
purple fanwort |
Cabomba pulcherrima |
20 |
|
water primrose |
Ludwigia octovalvis |
20 |
|
buttonbush |
Cephalanthus occidentalis |
20 |
|
lemon bacopa |
Bacopa caroliniana |
10 |
|
southern naiad |
Najas guadalupensis |
10 |
|
willow |
Salix spp. |
10 |
|
southern water-grass |
Hydrochloa caroliniensis |
10 |
|
spider-grass |
Websteria confervoides |
10 |
Emma (Lake County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on June 2, 1999
|
Percent area covered with aquatic vegetation (PAC, %) |
8 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
2 |
|
Average emergent plant biomass (kg wet wt/m2) |
5.9 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
2.2 |
|
Average submersed plant biomass (kg wet wt/m2) |
0.2 |
|
Average width of emergent and floating-leaved zone (ft.) |
54 |
|
Average lake depth (m) |
5 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
maidencane |
Panicum hemitomon |
90 |
|
torpedograss |
Panicum repens |
90 |
|
slender spikerush |
Eleocharis baldwinii |
80 |
|
banana-lily |
Nymphoides aquatica |
80 |
|
wax myrtle |
Myrica cerifera |
80 |
|
sawgrass |
Cladium jamaicense |
80 |
|
duck-potato |
Sagittaria lancifolia |
70 |
|
fragrant water-lily |
Nymphaea odorata |
70 |
|
lemon bacopa |
Bacopa caroliniana |
70 |
|
water-pennywort |
Hydrocotyle umbellata |
60 |
|
buttonbush |
Cephalanthus occidentalis |
60 |
|
pickerelweed |
Pontederia cordata |
50 |
|
bog-moss |
Mayaca fluviatilis |
40 |
|
rush fuirena |
Fuirena scirpoidea |
40 |
|
red ludwigia |
Ludwigia repens |
30 |
|
southern naiad |
Najas guadalupensis |
30 |
|
water primrose |
Ludwigia octovalvis |
30 |
|
willow |
Salix spp. |
30 |
|
Florida bladderwort |
Utricularia floridana |
30 |
|
cat-tail |
Typha spp. |
20 |
|
St. John's wort |
Hypericum spp. |
20 |
|
red maple |
Acer rubrum |
20 |
|
big rose mallow |
Hibiscus grandiflorus |
20 |
|
common salvinia |
Salvinia rotundifolia |
10 |
|
spatterdock |
Nuphar luteum |
10 |
|
baby-tears |
Micranthemum umbrosum |
10 |
|
coontail |
Ceratophyllum demersum |
10 |
|
tapegrass |
Vallisneria americana |
10 |
|
Illinois pondweed |
Potamogeton illinoensis |
10 |
|
salt-bush |
Baccharis spp. |
10 |
|
southern water-grass |
Hydrochloa caroliniensis |
10 |
|
stonewort |
Nitella spp. |
10 |
|
southern cutgrass |
Leersia hexandra |
10 |
|
pipewort |
Eriocaulon spp. |
10 |
|
knot grass |
Paspalum distichum |
10 |
|
bald cypress |
Taxodium distichum |
10 |
|
sweetbay |
Magnolia virginiana |
10 |