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黄土坡地坡面侵蚀过程包括降雨过程中的产流产沙过程以及相应的坡面形态变化过程，该文主要研究产流产沙过程。在对国内外已有同类成果分析的基础上，为了弥补现有成果的一些不足之处，设计了室内黄土坡面侵蚀模拟实验。实验分１０个组次对产流、渗流、产沙、沟道发育、沟与坡的侵蚀过程及其坡蚀量、沟蚀量、侵蚀过程中的微地貌现象直至坡形变化进行了详细测量与观察，获得了大量实测数据。关于坡面形态变化的讨论将在后文②展开。本文及后文￣［１］中论述的实验结果不仅初步揭示了黄土坡面侵蚀过程中上述要素的变化机理，而且也为今后在这方面进行定量化研究提供了精度较高的实测资料。
The process of slope erosion on the loess slope includes runoff and sediment production during the rainfall and the corresponding slope morphological change process. This paper mainly studies the runoff and sediment production process. Based on the analysis of similar results both at home and abroad, in order to make up for some shortcomings of the existing achievements, a simulation experiment of slope erosion on the loess plateau was designed. The experiment was divided into 10 groups and conducted a detailed measurement on the flow, seepage, sand production, channel development, erosion process of ditch and slope and its slope erosion, gully erosion, micro-topography in the erosion process until the slope change With observation, a large number of measured data were obtained. The discussion on the morphological changes of slopes will be carried out later. The experimental results discussed in this paper and in the following article [1] not only revealed the mechanism of the above-mentioned factors during the process of loess slope erosion, but also provided more accurate measured data for quantitative research in this respect.