摘要
本文利用航空相片沟间地与沟谷地分异明显的特点,在陕北黄土丘陵区按地表形态,选出典型地段的样片,勾绘谷缘线,量算沟间地与沟谷地的面积。得出:1.陕北黄土丘陵区沟间地与沟谷地的面积比例关系有区域性差异,但不存在地带性规律;2.二者的面积比例既受古地形制约,也受人类开垦历史的影响;3.有深层滑坡的地域,沟间地比例小,在35%左右;4.河源区沟间地比例大,在45%左右;5,其余大部分地区沟间地比例均在40%左右。
The rim line of present gully can be deemed as a boundary to divide land of study area into two sections,namely,the ridge-land above this line,and the gullied-land below it.But it is not very often to get the actual proportion because of some subjective reasons and/or some comp- lex objective local characteristics.In this paper,we used aerial photographs to divide the area into four differnt regions,selected typical sample air- photos,interpreted the rim line of gully,and measured the areas of the two sections.Accordig to the results,we can get the following conclusions. 1 )The proportions have some regional differences,but no zonal regularity in this area. 2)This proportions are not only restricted by palaeo-topography, but also impacted by human activities. 3)Ridge-land amounts to about 35% in the region where deep-level land slip appears very commonly,45% in river source area and 40% in the rest areas.
出处
《水土保持通报》
CSCD
北大核心
1990年第3期37-44,共8页
Bulletin of Soil and Water Conservation
关键词
黄土丘陵
沟间地
沟谷地
面积比例
land between gully
gully land
rim line of gully
interpretation of aerial photograph
