Hydraulic roughness

Hydraulic roughness is the measure of the amount of frictional resistance water experiences when passing over land and channel features.[1] One roughness coefficient is Manning's n-value.[2] Manning's n is used extensively around the world to predict the degree of roughness in channels. Flow velocity is strongly dependent on the resistance to flow.[3] An increase in this n value will cause a decrease in the velocity of water flowing across a surface.[4]

  1. ^ Vieux, B.E. (2004). Distributed Hydrologic Modeling Using GIS. Springer. p. 14. ISBN 9781402024597. Retrieved 2015-07-24.
  2. ^ "Verified Roughness Characteristics of Natural Channels". wwwrcamnl.wr.usgs.gov. Retrieved 2015-07-24.
  3. ^ Fard, R., Heidarnejad, M., & Zohrabi, N. (2013). Study Factors Influencing the Hydraulic Roughness Coefficient of the Karun River (Iran). International Journal of Farming and Allied Sciences, 2(22), 976-981. ISSN 2322-4134
  4. ^ Kondolf, G.M.; Piégay, H. (2003). Tools in Fluvial Geomorphology. Wiley. p. 294. ISBN 9780471491422. Retrieved 2015-07-24.