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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Deforestation of water-repellent soils in Galicia (NW Spain): effects on surface runoff and erosion under simulated rainfall
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Deforestation of water-repellent soils in Galicia (NW Spain): effects on surface runoff and erosion under simulated rainfall

机译：加利西亚（西班牙西北部）的憎水土壤砍伐森林：模拟降雨对地表径流和侵蚀的影响

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摘要

At three adjacent sites in steeply sloping woodland in Galicia (NW Spain), surface runoff and associated erosion under simulated rainfall (64 mm h~(-1)) were measured on five occasions between June 1998 and July 1999. Two of the three sites had recently been deforested and topsoil added, and one of these two had been sown with grass, which was germinating at the onset of the study. Deforestation greatly increased runoff and erosion rates, and the recovery of plant cover reduced erosion. All three soils were very hydrophobic due to high levels of poorly humified organic matter, which led to higher runoff rates than expected, especially during dry periods. However, great structural stability prevented there being a significant correlation between runoff rate and soil erosion.
机译：在加利西亚（西班牙西北部）陡坡林地的三个相邻地点，在1998年6月至1999年7月之间五次测量了模拟降雨（64 mm h〜（-1））下的地表径流和相关侵蚀。这三个地点中的两个最近被砍伐了森林并增加了表土，并且其中两个已经用草播种了，该草在研究开始时就发芽了。砍伐森林极大地增加了径流和侵蚀速率，而植物覆盖的恢复减少了侵蚀。由于高水平的腐殖质有机物含量高，这三种土壤都具有很高的疏水性，导致径流率高于预期，特别是在干旱时期。但是，良好的结构稳定性阻止了径流率与土壤侵蚀之间的显着相关性。

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