Raindrop and flow interactions for interrill erosion with wind-driven rain
Raindrop and flow interactions for interrill erosion with wind-driven rain
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DOI：
10.1080/00221686.2013.778339
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发表时间：
2013-10
影响因子：
2.3
通讯作者：
G. Erpul;D. Gabriels;L. Norton;D. Flanagan;C. H. Huang;S. Visser
中科院分区：
文献类型：
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作者：
G. Erpul;D. Gabriels;L. Norton;D. Flanagan;C. H. Huang;S. Visser
利用风洞中的二维实验装置，对水蚀预报工程模型中的细沟部分进行了风致降雨试验。对7%、15%和20%的迎风坡和背风坡的土壤表面进行了同步风雨模拟。当水平风速为6、10和14m时，S−1的下落轨迹随水平风速的变化而变化，影响流边界上的雨滴垂直应力和横向应力的大小也发生了变化，产生了雨滴相对于下行流的不同方向的横向喷流。为了考虑雨滴撞击和细沟间浅层水流的相互作用，采用了雨滴溅射和水流动能通量的矢量方法，从而提高了预报输沙速率的相关性。
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 14 m 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.