Watersheds of Indiana - Definition and Overview

The Watersheds of Indiana consist of six distinct Indiana watershed regions that drain in to five major bodies of water.

In the above map, The largest area, shaded in green, drains into the Wabash River. Of the other watersheds, the blue areas drain into Lake Michigan, the yellow area drains into the Illinois River, the pink area drains in to the Maumee River, the gray area drains into the Ohio river.

Illinois River watershed

With the Kankakee River, the Illinois River watershed stretches from the Illinois border in northwest Indiana and up into Michigan in St. Joseph County.

This drainage area include most of the state known as the "lake region", including the city of La Porte but excluding the area around the Indiana dunes and the Grand Calumet River, which drains into Lake Michigan.

Lake Michigan watersheds

There are two watersheds in the state that drain into Lake Michigan. In the northwest part of the state, it includes the Grand Calumet River area in Lake and Porter counties and includes the cities of Gary and Hammond, which includes the cities of .

The second, and larger Lake Michigan watershed is the St. Joseph River watershed, which drains the north central and northeastern part of the state. It includes the cities of South Bend, Elkhart, Mishawaka and Goshen.

Maumee River watershed

The smallest watershed in the state is the Maumee River watershed in the northeast part of the state on the border with Ohio. It includes most of the city of Fort Wayne as well as the cities of New Haven and Auburn. The Maumee eventually empties into Lake Erie at Toledo, Ohio.

Ohio River watershed

The Ohio River watershed includes the extreme southern part of the state as well as the extreme southwestern Indiana counties. This drainage area includes the cities of Evansville, Richmond and New Albany as well as the Indiana suburbs of Cincinnati, Ohio.

Wabash River watershed

By far the largest watershed in the state, the Wabash River drainage area contains the several large cities, including Indianapolis and the extreme western part of Fort Wayne. Other cities included in the area are Bloomington, Muncie, Lafayette, Anderson and Terre Haute. This watershed also includes most of Indiana's prime farm land.

External link

• Indiana Department of Environmental Managemement Watershed Management web site (http://www.in.gov/idem/water/planbr/wsm/watershedmgmtinfo.html)