The unusual channel resistance of the Texas Hill Country and its effect on flood flow predictions

The central Texas flood of 2002

Auteurs :
CONYERS, M.M.
FONSTAD, M.A.
DIXON, R.W.

Description :
This paper details how an important flood property, the hydraulic resistance, varies around the uplifted limestone area of south-central Texas known as the Texas Hill Country, and how this variation could translate to inaccuracy in floodplain delineations. The AA. present a new method to extract spatial maps of hydraulic roughness using channel geometry and newly accessible USGS National Water Information System (NWIS) data. They use these data to construct maps of hydraulic roughness at different discharges and to test roughness prediction methods suggested by previous AA.


Type de document :
Congrès

Source :
Symposium on Living in flood alley : lessons to learn, San Marcos, Etats-Unis, 2003-09, Physical geography, issn : 0272-3646, 2005, vol. 26, n°. 5, p. 379-395, nombre de pages : 17, Collation : Illustration, Références bibliographiques : 31 ref.

Date :
2005

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