| SEDIMENT BUDGET OF THE ILLINOIS RIVER |
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| 作者姓名： | Misganaw DEMISSIE Renjie XIA Laura KEEFER Nani G. BHOWMIK |
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| 作者单位： | Illinois State Water Survey，Watershed Science Section，U.S. Army Corps of Engineers，Rock Island District，Illinois State Water Survey，Watershed Science Section，Illinois State Water Survey，Watershed Science Section Champaign，IL，USA，Rock Island，IL，USA，Champaign，IL，USA，Champaign，IL，USA |
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| 摘 要： | 1 BACKGROUND The Illinois River is the most significant river in the state of Illinois. The river drains nearly half of the state and has a drainage area of 28,906 mi2 (74,867 km2). Except for about a 4,000 mi2 (10,360 km2) area in Indiana and Wisconsin, the watershed is located in Illinois (see Fig. 1). The watershed contains the drainage basins of several of the state's significant rivers such as the Sangamon, LaMoine, Spoon, Mackinaw, Vermilion, Fox, Kankakee, and Des Plaines Ri…
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SEDIMENT BUDGET OF THE ILLINOIS RIVER |
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| Misganaw DEMISSIE,Renjie XIA,Laura KEEFER,Nani G. BHOWMIK.SEDIMENT BUDGET OF THE ILLINOIS RIVER[J].International Journal of Sediment Research,2003(2). |
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| Authors: | Misganaw DEMISSIE Renjie XIA Laura KEEFER and Nani G BHOWMIK Illinois State Water Survey Watershed Science Section Champaign IL USA E-mail: demissie@swsuiucedu US Army Corps of Engineers Rock Island District Rock Island IL USA Illinois State Water Survey Watershed Science Section Champaign IL USA Illinois State Water Survey Watershed Science Section Champaign IL USA E-mail: nbhowmik@swsuiucedu |
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| Institution: | Misganaw DEMISSIE1,Renjie XIA2,Laura KEEFER3 and Nani G. BHOWMIK4 1 Illinois State Water Survey,Watershed Science Section,Champaign,IL,USA,E-mail: demissie@sws.uiuc.edu 2 U.S. Army Corps of Engineers,Rock Island District,Rock Island,IL,USA 3 Illinois State Water Survey,Watershed Science Section,Champaign,IL,USA 4 Illinois State Water Survey,Watershed Science Section,Champaign,IL,USA,E-mail: nbhowmik@sws.uiuc.edu |
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| Abstract: | The Illinois River, the most significant river in Illinois, drains nearly half of the state and most of the major streams in Illinois drain into it. The Illinois Waterway with its system of locks and dams links Chicago and the Great Lakes to the Mississippi River, and, thus, the Gulf of Mexico. This linkage has a significant transportation and commercial value for the state and the nation. In addition, with its numerous backwater lakes, wetlands, and floodplain forests, the Illinois River valley provides a significant habitat for fish, waterfowl, birds, and other animals, making it an important ecological resource. The Illinois River's environment has been subjected to many of the impacts associated with developments in the watershed, including waste discharges from urban areas, water-level control for navigation, and sediment and chemical inflow from agricultural lands. The quality of the river was severely degraded for several decades prior to the 1970s when environmental regulations were enacted to control pollutant discharges. Since then the quality of the river has been gradually improving. However, problems associated with erosion and sedimentation have not been improving and are recognized as the number-one environmental problem in the Illinois River valley. The main sources of sediment to the Illinois River valley are watershed erosion, streambank erosion, and bluff erosion. The contribution of watershed erosion to the sedimentation problem in the Illinois River valley has been quantified by analyzing the sediment yields of tributary streams that drain into the valley. Annual sediment yield equations were developed for the major tributaries and then used to construct an approximate sediment budget for the Illinois River valley. |
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| Keywords: | The Illinois River Sediment load Sediment budget analysis Annual sediment yield equations |
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