Morphometry and Michigan s Inland Lakes
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1 Morphometry and Michigan s Inland Lakes How Lake Size and Shape Affect Water Quality Pam Tyning
2 How Big is Big? What s the biggest lake?... the smallest? How does your lake compare? How do size and shape affect water quality?
3 Morphometry and Water Quality Lake Surface Area Shoreline Length Maximum Depth Average Depth Lake Volume Temperature Dissolved Oxygen Total Phosphorus
4 Information Sources Morphometry Michigan Geographic Data Library DNR Maps Breck, 2004 Water Quality National Lakes Assessment U.S. EPA STORET
5 Water Quality Data Sources National Lakes Assessment US EPA STORET
6 Lakes Greater Than 5 Acres: 10,031 6,000 5,335 5,000 Number of Lakes 4,000 3,000 2,000 1,000 3,568 1,030 Houghton Torch Burt Charlevoix Mullett Gogebic Portage Manistique Higgins Black to Less Than to to ,000 to 10,000 Greater Than 10,000 Lake Size (in acres) Source: Michigan Geographic Data Library
7 Source: Michigan Geographic Data Library
8
9 Surface Area and Shoreline Length Michigamme Reservoir Shoreline: 76 miles Houghton Torch Allegan Paw Paw James Big Fish Thread Shoepac Surface Area (acres) 20,044 18,728 1, Shoreline Length (miles) Shoreline Development Factor: Shoreline Length (2 (π Surface Area))
10 Shoreline Development Factor Thread Allegan Paw Paw Torch Big Fish Houghton James Shoepac
11 Shoreline Development Factor Highest SD Lowest SD LAKE_NAME COUNTY ACRES_GIS PERIMETER Shoreline Development 1 Presque Isle River Fl Gogebic Smallwood Lake Gladwin Shiawassee R. Flooding Saginaw Widewaters,The Chippewa Paw Paw River Van Buren No Name Marquette Ninth Street Pond Alpena Walton River Menominee No Name Roscommon Michigamme Reservoir Iron J Pool Schoolcraft Kalamazoo River Calhoun Lake James Roscommon Wixom Lake Gladwin Cataract Basin Marquette Secord Lake Gladwin C-Two Pool Schoolcraft Michigammee River Iron Martiny Lake Mecosta No Name Marquette First Lake Chippewa Greenwood Reservoir Marquette Howardsville Hydro El St. Joseph Flat River Kent Sunken Lake Presque Isl LAKE_NAME COUNTY Shoreline ACRES_GIS PERIMETER Development 6439 Camp Seven Lake Delta Fifteen, Lake Iron Salma, Lake Manistee Cone Lake Iron Morgan Lake Oakland Lampman Lake Montcalm Buckbee Lake Genesee Nolten Lake Cheboygan Sixteen, Lake Delta Andrus Lake Chippewa Duck Lake Livingston no name Marquette Aldrich Lake Schoolcraft Marsh Lake Crawford Kitchners Lake Menominee Pretty Lake Luce Timmerman Lake Manistee Bohmier Lake Houghton Glovers Lake Manistee Sand Lake Mackinac Mahaney Lake Montcalm Number Eighteen, Lake Menominee Mud Lake Van Buren Mahskeekee Lake Delta Brandts Lake Menominee *Lakes greater than 10 acres in area
12 Shoreline Development Factor Smallwood Lake: 11.4 Lake Sixteen: 1.0
13 Shoreline Development Factor Smallwood: acres Goose Lake: acres
14 Maximum Depth Paw Paw James 10 Allegan 5 Thread 94 Torch Shoepac Big Fish 70 Houghton 21
15 Depth Torch Shoepac Paw Paw Big Fish Houghton James Allegan Thread Average Depth (feet) Maximum Depth (feet)
16 Volume 3,000,000 2,500,000 2,573,256 Volume (acre-feet) 2,000,000 1,500,000 1,000, , ,463 30,273 8,475 1,687 1,170 1, Torch Houghton Paw Paw Allegan Big Fish James Shoepac Thread
17 Temperature
18 Temperature: Shallow Lake Temperature ( F) Depth (feet) 3 10 Houghton
19
20 Temperature: Deep Lake Temperature ( F) Depth (feet) Torch Epilimnion Thermocline Hypolimnion
21 Dissolved Oxygen Sources Saturation Temperature Dissolved Oxygen (ppm) Minimum Requirements Trout, salmon 7 Bass, pike 5 Caddisflies 4 Leeches 3 Bloodworms 2
22 Dissolved Oxygen: Shallow Lake Constantly mixed Uniform temperature Well oxygenated Dissolved Oxygen (ppm) Depth (feet) Houghton
23 Dissolved Oxygen: Deep Lakes Aerobic Hypolimnion Depth (feet) Dissolved Oxygen (ppm) Torch Anaerobic Hypolimnion Depth (feet) Dissolved Oxygen (ppm) Paw Paw
24
25 Phosphorus External Sources (Watershed) Concentrations (ppb) Low Less than 10 Oligotrophic Moderate 10 to 20 Mesotrophic Internal Sources High Above 20 Eutrophic
26 Phosphorus in Michigan National Lakes Assessment 35 US EPA STORET 1, , ,200 1,000 Number of Lakes Number of Records <10 10 to <20 20 to <50 50 to < to to 1,000 >1,000 Total Phosphorus (ppb) Total Phosphorus (ppb)
27 Phosphorus in Shallow Lakes Total Phosphorus (ppb) Total Phosphorus (ppb) Depth (feet) Depth (feet) James Thread
28 Phosphorus in Deep Lakes Total Phosphorus (ppb) Total Phosphorus (ppb) Depth (feet) Depth (feet) Torch Paw Paw
29
30 Summary Over 10,000 lakes greater than 5 acres Wide variety of shapes and sizes Wide range in water quality Current quality due in part to morphometry Morphometry is difficult to alter
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