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黄河流域72.3万平方公里中,丘陵沟壑区占23.6万平方公里,约33%,占黄土高原面积的39%。农业耕作为这个区的主要经营方式,水土流失最为严重,侵蚀模数每年可高达每平方公里万吨以上,给黄河中下游造成严重的危害。支离破碎的地形,星罗棋布的梁峁,万千纵横的沟谷,研究其特征将有助于分析对水土流失的影响。本文以黄土丘陵沟壑区的杏子河流域为对象,着重讨论梁峁的分布特征,并分析这些统计特征对水土流失和农业生产的影响。
Of the 723,000 square kilometers in the Yellow River Basin, the hilly and gully areas occupy 236,000 square kilometers, accounting for about 33%, accounting for 39% of the Loess Plateau. As the main mode of operation in this area, agricultural cultivation has the most serious soil erosion. The erosion modulus can reach as high as over 10,000 tons per square kilometer, causing serious damage to the middle and lower reaches of the Yellow River. The fragmented terrain, dotted beams, thousands of vertical and horizontal valleys, and their characteristics will help to analyze the impact on soil erosion. In this paper, the Xingzi River Basin in the gully region of the Loess Plateau is the focus of the study. The distribution characteristics of the taxa are mainly discussed, and the impacts of these statistics on soil erosion and agricultural production are analyzed.