landform

The thalweg in loess hill area is an important terrain structural line, reflecting topography and landform character.

黄土丘陵区的沟沿线,是反映该区貌特征的重要的构线。

The wavy distribution curve of precipitation formed on the longitudinal-arranged underlying rangegorge landforms.At leeside of range, dry valley formed due to fohn effect.

纵向排列的岭谷波，成明显的降水波状起伏分布曲线，气流过山岭后下沉气流带来“焚风”效应，成干热河谷。

The general formula about the calculation of downslide force and resistance to sliding in the arbitrary unit of landslide is deduced in the digital landform image.

讨论了滑坡动态方向系数的概念，并在此基础上义了滑坡的滑动方向和滑坡的系数。

It was estimated that the prospect perspective were weakness in Zhidan area once, since data was narrow, and prospect is difficult for complicated landforms (vale, ridge and replat).

摘要由于资料的限制，前人对志丹探区勘探前景评价较低，加之沟谷、梁、赤纵横的貌特征，勘探难度较大。