Groundwater resources and their characteristics in arid lands of northwestern china 中国西北干旱区的地下水资源及其特征
Arid land ecosystems 干旱地区生态系统
Arid land geography 干旱区地理
Analysis on spatial differences of landscape and ecological construction in arid land oasis 干旱区绿洲景观空间分异特征及其生态建设方略研究
The research on eco - environmental evolution , control and adjustment for the arid land in western china : research progress and prospect 中国西部干旱区生态环境演变与调控研究进展与展望
Groups traveling arid lands often fail to carry adequate water or a way of purifying water from natural sources 组队旅行在干旱地区经常会由于没有足够的水或没有从自然资源中找到净化的水而失败。
With limited water in arid lands , desert travelers must strive to reduce their impact on the animals struggling for survival 在贫瘠的土地中水资源极为有限，行走沙漠一定尽力减少对活在生存线上的动物造成影响。
So it has a great significance for arid land production to study the effect of water and temperature on the properties of soil and crops 因此，研究水热条件对土壤、作物性状影响，对旱地农田生产有十分重要的意义。
Using by the method of difference analyze and the theory of regression analyze , the analyzed the spatial characteristic of vegetation change in arid land 6 在差值分析和回归理论的支持下，分析了干旱区植被变化的空间特征； 6
