Lakes of Missouri Volunteer Program University of Missouri- Columbia The Missouri’s Lakes and Reservoirs The Missouri Department of Natural Resources Region V11, US Environmental Protection Agency, through the Missouri Department of Natural Resources, has provided partial funding for this project under Section 319 of the Clean Water Act Tony Thorpe Dan Obrecht Jack Jones
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Lakes of Missouri Volunteer Program University of Missouri-Columbia The Missouri’s Lakes and Reservoirs The Missouri Department of Natural Resources Region.
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Lakes of Missouri Volunteer Program
University of Missouri-Columbia
The
Missouri’s Lakes and Reservoirs
The Missouri Department of Natural Resources
Region V11, US Environmental Protection Agency, through the Missouri Department of Natural Resources, has provided partial funding for this project under Section 319 of the Clean Water Act
Tony Thorpe Dan Obrecht Jack Jones
405 Classified Lakes/Reservoirs
• ~108 are Drinking Water Supply (LC1)
• 14 are Major Reservoirs (LC2)
Most are man-made reservoirs, with about 15 - 20 oxbow lakes.
Of the 405 Classified Waterbodies, we have at least 4 years worth of data on 134
What follows is a summary of the physical features of those 134 waterbodies
“A central paradigm of modern limnology is that external nutrient loading, modified by morphology and hydrology, determines the trophic state of a lake.”
Jones et al. 2005
Lake Morphology• Surface Area• Depth• Volume
Lake Hydrology• Watershed Area• Residence Time
External Loading• Land Use
Surface Area
Ranges from 6 to 53,814 acres in size, with a median of 103 acres.
Break down by size
1 - 10 acres
11 - 20 acres
21 - 40 acres
41 - 75 acres
76 - 150 acres
151 - 300
301 - 10001,001 - 2,0002,001 - 10,000> 10,000
acres
30% of classified lakes are 20 acres or less in size.
10% are greater than 300 acres in size.
Average Depth
Ranges from 3.7 feet to 62 feet, with a median of 11.6 feet.
Lake Volume
Ranges from 48 to 2,700,000 acre-feet, with a median of 1,675 acre-feet.
1 acre-foot = 325,851 gallons
1 acre1 foot
Lake Hydrology
Watershed Area
Ranges from 83 to > 4,000,000 acres, with a median of 2,516
acres.
Residence Time
Ranges from 2.6 days to 9 years, with a median of 10.5 months.
External Loading
Land Cover within watersheds
Forest = 0 – 95%
Grass = 0 – 78%
Crop = 0 – 74%
Urban = 0 – 96%
Using the 134 classified lakes for which we have >= 4 years worth of data
7
20
55
148
To
tal
Ph
osp
ho
rus
(g
/L)
Medium
Amount of Row Crop in the Watershed
Low High
Land Cover and Water Quality:Row Crop
Data points based on summertime averages near the dam
7
20
55
148
To
tal
Ph
osp
ho
rus
(g
/L)
Medium
Amount of Forest in the Watershed
Low High
Land Cover and Water Quality:Forest
Data points based on summertime averages near the dam