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山坡片流及其泥沙既是泥石流水、土来源之一,又是山区江河水沙来源之一。 所谓片流、系指坡面面状水流和散状股流(或称为散流、股流实为纹沟水流和细沟水流之总称)。片流除冲刷土层,造成一般水土流失外,还可以激发泥石流,塑造出微细沟道,降低乃至破坏山区土地资源,降低山地高度和减缓山坡坡度,是山坡演变的营力之一。本文以蒋家沟流域的观测资料,讨论泥石流源地的片流及其泥沙的概况。
The hillside stream and its sediment are not only one of the sources of debris flow and soil, but also one of the sources of water and sediment in mountainous rivers. The so-called sheet flow, refers to the slope of the surface flow and bulk flow (also known as casual, the stock is actually the groove groove and rill flow of water in general). In addition to erosion of the soil layer, resulting in general soil erosion, but also stimulate the debris flow, shaping a fine channel, reduce or even damage the mountain land resources, reduce the height of the mountain and ease the slope, is one of the growing campuses. Based on the observation data of Jiangjiagou watershed, this paper discusses the general situation of sheet flow and sediment in debris flow source.