In this paper, on the premise that the arid climate system of northwest China is considered, the law of origination and evolution of northwest arid climate is summarized; the prediction theory and method of northwest arid climate, and the relationship between regional climate change and human behavior are qualitatively discussed to some extent.

The Sain Us gold deposit is a typical auriferous sulfide quartz vein deposit in the arid grassland climatic zone of Inner Mongolia The oxidation zone has been controlled by the arid climate since the beginning of Holocene.

By analyzing the low of arid climate and its stress effects on farming in the mountainous areas of south Ningxia, the paper indicates that drought disasters are the main reason for the low and unstable agroproductivity, and the farming techniques being suitable to the climatic condition should be investigated and improved so as to lay a foundation to the sustainable development of agriculture.

Assessment on the influence of drought climate on main crop yield in Southeast of Gansu;

Analysis of Drought Climate in Lintao During Late Spring and Early Summer;

Risk assessment of climatic drought for winter wheat in Henan;

Analysis on effects of evolution of dry climate in Tianshui in 20th century on agriculture and countermeasures;

After careful examination on the coarse deposits, in comparison with the modern and ancient alluvial fan analogues, these discrete red coarse deposits are proposed as the remains of different parts of one Paleogene piedmont alluvial fan, sourced by the carbonate hinterland under a dry climate.

Based on the causer analysis,the Paleogene alluvial fan is proposed as piedmont alluvial fan sourced by the carbonate hinterland under a dry climate.