Raindrop and flow interactions for interrill erosion with wind-driven rain

ERPUL G., Gabriels D., Norton L. D., Flanagan D. C., Huang C. H., Visser S.

JOURNAL OF HYDRAULIC RESEARCH, cilt.51, sa.5, ss.548-557, 2013 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 51 Sayı: 5
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1080/00221686.2013.778339
  • Dergi Adı: JOURNAL OF HYDRAULIC RESEARCH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.548-557
  • Anahtar Kelimeler: Flow kinetic energy flux, interrill erosion, raindrop impact velocity vector, Water Erosion Prediction Project, wind-driven rain, SEDIMENT TRANSPORT CAPACITY, SPLASH-SALTATION, WATER EROSION, SAND DETACHMENT, OVERLAND-FLOW, SOIL-EROSION, IMPACT, PREDICTION, TUNNEL, MODEL
  • Ankara Üniversitesi Adresli: Evet

Özet

Wind-driven rain (WDR) experiments were conducted to evaluate the interrill component of the Water Erosion Prediction Project model with a two-dimensional experimental set-up in a wind tunnel. Synchronized wind and rain simulations were applied to soil surfaces on windward and leeward slopes of 7, 15 and 20%. Since WDR fall trajectory varied with horizontal wind velocities of 6, 10, and 14m s(-1), magnitude of raindrop normal and lateral stresses on flow at the impact-flow boundary also changed and differentially directed lateral jets of raindrop splashes with respect to downward flows occurred. To account for interactions between raindrop impact and interrill shallow flow, a vector approach with kinetic energy fluxes of both raindrop splashes and flow were used and this resulted in greater correlations in predicting sediment delivery rates.