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一般来说,沟道切割密度的大小,反映着土壤侵蚀的强弱及沟道发育程度。许多学者(侵蚀地貌、土壤侵蚀和水土保持等),非常重视沟道切割密度这一数量指标。黄土丘陵沟壑区面积为28.56万平方公里,如果逐条一一量测沟道密度,工作量是惊人的。为了减少量算时的工作量,进一步研究沟道切割密度与其它地貌形态数量间的关系是很必要的。本文采用《水土保持通报》1983年第4期“杏子河流域沟道切割密度的量算及分布规律”文中的资料,按小流域进行统计,得出沟道频数与平均沟道长度间成幂相关关系,并建立了沟道密度统计数学模型。
In general, the size of the channel cutting density, reflecting the strength of soil erosion and channel development. Many scholars (eroded landforms, soil erosion and soil and water conservation, etc.), attaches great importance to the number of indicators of channel density. Loess hilly and gully area of 285,600 square kilometers, if one by one measurement of channel density, the workload is staggering. In order to reduce the workload when calculating, it is necessary to further study the relationship between channel cutting density and the number of other topography. In this paper, “Soil and Water Conservation Bulletin” No. 4, 1983 “Xingzi River Valley trench cutting density of the calculation and distribution of” the information in the text, according to the small watershed statistics, derived channel frequency and average channel length between the power And established a statistical mathematical model of channel density.