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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Rill development and soil erosion: A laboratory study of slope and rainfall intensity
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Rill development and soil erosion: A laboratory study of slope and rainfall intensity

机译：小河发展与土壤侵蚀：坡度和降雨强度的实验室研究

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摘要

A total of 15 rainfall simulation experiments were conducted in a 1 m by 2 m box varying slope (10, 20, 30%) and rainfall intensity (60, 90, 120 mm h~(-1)). The experiments were performed to study how rill networks initiate and evolve over time under controlled conditions with regard to the treatment variables considered, and to allow for input in a computer simulation model. Runoff and sediment yield samples were collected. Digital elevation models were calculated by means of photogrammetry for several time steps of most experiments. The soil used in the experiments was a basal till derived Cambisol typical for the Swiss Plateau. While significant differences were found for sediment yield, runoff did not vary significantly with treatment combinations. Increasing rainfall intensity had a larger effect on sediment yield than increasing slope. Rill density and energy expenditure decreased with time, suggesting that energy expenditure was a useful parameter to describe the emergence of rill network at the laboratory scale.
机译：在1 m x 2 m的箱形坡度（10、20、30％）和降雨强度（60、90、120 mm h〜（-1））中进行了总共15次降雨模拟实验。进行实验以研究在受控条件下，考虑到的治疗变量，小溪网络如何随时间变化而启动和演化，并允许输入计算机模拟模型。收集径流和沉积物产量样品。在大多数实验的几个时间步中，通过摄影测量法计算了数字高程模型。实验中使用的土壤是瑞士高原典型的基础耕作的坎比索尔土壤。虽然发现沉积物产量有显着差异，但径流随处理组合的变化不显着。降雨强度增加对沉积物产量的影响大于坡度增加。堆肥密度和能量消耗随时间减少，这表明能量消耗是描述实验室规模的钻探网络出现的有用参数。

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