摘要
该文运用航片和野外调查资料,对黄土丘陵沟壑区坡面浅沟侵蚀发育的特征值进行了研究。结果表明,发生浅沟侵蚀的临界坡度约为18°,临界坡长为40m 左右,临界汇水面积约为650m^2。且临界坡长、浅沟分布间距和临界汇水面积与坡面平均坡度呈二次曲线关系。曲线的变特征表明,临界坡长、平均间距和临界汇水面积的最小值所对应的坡度都是26°左右。从而得出,26°左右的坡面最有利于浅沟侵蚀的发生。
The characteristic value of shallow gully erosion genesis on slope farmland in the loess plateau of Shaanxi province are evaluated with data from aerial photo interpretation and field survey.Results show that critical slope steepness of shallow gully erosion occuring is 18°,and 40 metres in critical slope length,650 square metre in runoff converged area.The critical slope length,distance between shallow gullys and cri- tical runoff converged area are a square function of slope stepness.The feature of funcLion curve shows that critical slope length,critical runoff converged area and distance between shallow gullys haves minimum wh- en slope steepness is about 26°.The result can be conclude Lhat hillslope at about 26° is the most suscptible to shallow gully erosion.
出处
《水土保持学报》
CSCD
北大核心
1991年第2期8-13,共6页
Journal of Soil and Water Conservation
