landform

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

黄土丘陵区沟沿线,是反映该区形特征重要形结构线。

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.

纵向排列岭谷形波，形成明显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，形成干热河谷。

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稳定性系数概念，并在此基础上定义了滑坡滑动方向和滑坡稳定性系数。

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、赤纵横特征，勘探难度较大。