Nebraska Soils Field Trip - Virginia Tech
Nebraska Soils Field Trip - Virginia Tech
Nebraska Soils Field Trip - Virginia Tech
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
4th IUSS Soil Classification Conference <strong>Field</strong> Tour Guidebook<br />
belt and the loess hills in the uplands (fig. 5). Near the loess hills low gradient fluvial fan onlap the flood<br />
basin. The flood basin is a low relief that lacks distinct meander scars and obows. The backswamp of<br />
the flood basin may be lower than the adjacent meander belt. Low areas of the flood basin often display<br />
flood distributary patterns. Because it does not have meander scars and oxbows left behind from the<br />
meandering Missouri River, the flood basin has fewer surface features than the channel belt or the<br />
meander belt. Most of the flood basin is at a lower elevation than the meander belt, but the flood basin<br />
has been flooded less frequently than the meander belt. At the conjunction of the meander belt and the<br />
flood basin, the meander belt is cut deeper into the Missouri River Valley and leaves behind an area that<br />
acts as a natural levee that is higher in elevation than the remaining bottom-land areas of the Missouri<br />
River valley.<br />
The rarely flooded Keg and Salix soils are typical of the soils on this natural levee (fig 6). Because<br />
floodwaters have not crested this natural levee for hundreds or even thousands of years, the soils are<br />
more developed than those on the channel belt or meander belt areas of the floodplain. Flooding in the<br />
flood basin is mainly caused by flooding tributary rivers and streams. These have all been diked or<br />
channelized in order to reduce this occurrence.<br />
Taxonomically the soils in this area consist of Mollisolls which range from well drained to poorly drained.<br />
Keg Fine-silty, mixed, superactive, mesic Typic Hapludolls<br />
Salix Fine-silty, mixed, superactive, mesic Typic Hapludolls<br />
Lakeport Fine, smectitic, mesic Aquertic Hapludolls<br />
Cooper Fine-silty over clayey, mixed, superactive, mesic Fluvaquentic Hapludolls<br />
Blencoe Clayey over loamy, smectitic over mixed, superactive, mesic Aquertic Hapludolls<br />
Woodbury Fine, smectitic, mesic Vertic Endoaquolls<br />
Luton Fine, smectitic, mesic Typic Endoaquerts<br />
Tieville Fine, smectitic, calcareous, mesic Vertic Endoaquolls<br />
Moville Coarse-silty over clayey, mixed, superactive, calcareous, mesic Aquic Udifluvents<br />
_________.<br />
Figure 5.—Major soil to parent material and position relationships of the Flood Basin of the Missouri River flood plain.<br />
67
Change language