暴流大多由坡地片流汇集而成。因为坡地上地表不是平整的，因而存在局部低平的凹地。
In general, penetration rate of a gully is related to the distance from the headstream of watershed and becomes slow as it approaches the upstream gully head. The feature is not evident for those gulliessignificantly interfered by human activities.
沟头延伸速度的大小,一般情况下与沟头距离流域源头的距离有关:沟头越接近流域上游,延伸速度越慢;受人类干预较明显的沟谷,上述规律会弱化。
参考来源 - 历史时期董志塬地貌演变过程及其成因·2,447,543篇论文数据，部分数据来源于NoteExpress
这条沟谷，也就改名叫海棠峪了。
沟谷雨林和次生林下阳春砂仁果实产量差异不显著。
The yield difference between ravine rainforest and secondary forest was not significant.
黄土高原广大地面被为数众多的大小沟谷切割得十分破碎。
Thus the surface of the plateau is cut into broken pieces by numerous ravines.
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