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The EPA ecoregion classification system has four levels, but only Levels I, III, and IV are shown on this list. Level I divides North America into 15 broad ecoregions (or biomes ). Illinois is almost entirely within the Eastern Temperate Forest environment Level I region, although very small sections in its extreme west are in the Great Plains ...
Macoupin Creek is a 99.7-mile-long (160.5 km) [2] tributary of the Illinois River, which it joins near the village of Hardin, Illinois.. The word macoupin refers to the yellow pond lily [3] [4] (Nuphar advena), a native plant of the regional wetlands, and a favorite food source of local Indians.
Edwards River; Elm River; Embarras River (Illinois) Fox River (Illinois River tributary), northern Illinois; Fox River (Little Wabash tributary), southern Illinois; Galena River; Grand Calumet River; Green River; Henderson Creek; Hickory Creek; Illinois River; Indian Creek; Iroquois River; Jackson Creek; Kankakee River; Kaskaskia River ...
The Illinois Waterway system consists of 336 miles (541 km) of navigable water from the mouth of the Calumet River at Chicago to the mouth of the Illinois River at Grafton, Illinois. Based primarily on the Illinois River , it is a system of rivers, lakes, and canals that provide a commercial shipping connection from the Great Lakes to the Gulf ...
Spring Lake has over 17 different species of aquatic vegetation, including Eurasian milfoil (invasive to Illinois), lily, and lotus. [3] [5] [4] "The tremendous spring recharge from the bed of the lake amounts to 52 acre feet a day, creating very cold water temperatures under the insulating layer of vegetation for the majority of the summer months.
The Illinois River (Miami-Illinois: Inoka Siipiiwi [4]) is a principal tributary of the Mississippi River at approximately 273 miles (439 km) in length. Located in the U.S. state of Illinois , [ 5 ] the river has a drainage basin of 28,756.6 square miles (74,479 km 2 ). [ 6 ]
The Sangamon River is a principal tributary of the Illinois River, approximately 246 miles (396 km) long, [2] in central Illinois in the United States. It drains a mostly rural agricultural area and runs through Decatur and past Springfield .
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