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<br /> <br />38 <br /> <br />OVERVIEW OF RIVER-FLOODPLAIN ECOLOGY IN THE UPPER MISSISSIPPI RIVER BASIN <br /> <br /> <br /> <br />I H H I <br />I 0 <br /> <br />1989 <br /> <br />1891 <br /> <br />Figure 3-7. Changes in land cover/land use, open-river reach, upper Mississippi River, 1891-1989. <br /> <br />eral restrictions than the open-river reach, the fate of pio- <br />neer forests in the impounded reaches is less clear. In the <br />next 50-150 years, sediment deposition in backwater areas <br /> <br />will continue 10 fonn new alluvial soils. Afterward, a new <br />but unknown balance of erosion and deposition may be <br />established. However, field observations indicate that wil- <br /> <br />0 Open Water <br />. Woody Te=trial <br />0 Agria>- <br />. UrbenlDcvelqled <br />I!III M.... <br />~ """""".. <br />i:SJ SandIMud <br /> <br />+ <br /> <br />KILOMETERS <br />2 0 2 4 6 8 <br />I H HI' I I <br /> <br />I, I <br />2 3 4 5 <br />MILES <br /> <br />r--1 <br />6 7 <br /> <br />I <br />8 <br />