Modeling stream-bank erosion in the Southern Blue Ridge Mountains

Changing fluvial systems

Auteur(s) et Affiliation(s)

ROGERS, J.C.

Dep. of Geography, Univ. of Georgia, Athens, Etats-Unis

LEIGH, D.S.

Dep. of Geography, Univ. of Georgia, Athens, Etats-Unis

MOSSA, J.

Dept. of Geography, Univ. of Florida, Gainesville, Etats-Unis

JAMES, L.A.

Dept. of Geography, Univ. of South Carolina, Columbia, Etats-Unis

Description :
This study examined the contribution of total sediment yield derived solely from eroded stream banks in small watersheds (<20 km2), using floodplain widths as proxies for long-term lateral erosion rates. The raw data were derived from watersheds with different land covers (Coweeta Creek and Skeenah Creek watersheds in the Upper Little Tennessee River basin). Bank-derived sediment yield estimates were modeled in a Geographic Information System, using linear regression to relate floodplain widths and erodible terrace bank heights. The AA. found total stream length to be a good predictor of both lateral erosion rates and erodible bank heights. Land cover, basin/network morphometrics, and reach-scale stream conditions were not good predictors. Modeled lateral migration and sediment yield results compare favorably to empirical measurements from 5 independent watersheds in the region.

Type de document :
Article de monographie

Source :
Physical geography, issn : 0272-3646, 2013, vol. 34, n°. 4-5, p. 354-372, nombre de pages : 19, Références bibliographiques : 2 p.

Date :
2013

Editeur :
Pays édition : Royaume-Uni, Abingdon, Taylor and Francis

Langue :
Anglais