Spatial Distribution of Soil Erosion Sensitivity on the Tibet Plateau

来源 :土壤圈(意译名) | 被引量 : 0次 | 上传用户:sk01230147
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The Tibet Plateau, occupying the main part of Qinghai-Tibet Plateau and having an average altitude of 4 500 m, has geomorphological features that are unique in the world, with soil erosion being one of the main ecological problems. Thus the main objectives of the present research were to set up an efficient and simple way of evaluating spatial distribution of soil erosion sensitivity in the Tibet Plateau as well as the responses of soil erosion to changes of natural environmental conditions, and to indicate key regions where soil erosion should be preferentially controlled. Based on the Universal Soil Loss Equation (USLE), the study applied geographic information system (GIS) technology to develop a methodological reference framework, from which soil erosion sensitivity could be evaluated. The impact of precipitation, soil, topography and vegetation on soil erosion was divided into classes of extreme sensitivity, high sensitivity, medium sensitivity, low sensitivity and no sensitivity. With the aid of GIS, the resultant map from overlaying various factors showed that soil erosion sensitivity had great discrepancy in different parts of the region. In the southeastern part of the Tibet Plateau there were mainly three classes of sensitivity, namely, extreme, high and medium sensitivity. However, the other two classes, low and no sensitivity, were dominant in the northwestern part.
其他文献
Using a scheme of agricultural fields with progressively less intensive management (deintensification), different management practices in six agroecosystems loc
Conversion of cropland to forestry and grassland is an important method to reduce soil erosion and improve the biophysical environment in the Loess Plateau. The
Based on related literature and this research, an ecological security evaluation from the pixel scale to the small watershed or county scale was presented using
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7
Phosphate release from three selected soils after treatments of 1.6 and 2.4 mmol L-1 P was investigated using sequential extractions and fitted using six kineti
The response of tomato (Lycopersicon esculentum) plants basically fertilized with 0.3 g N per plant of compound fertilizer with a N:P2O5:K2O ratio of 20:10:20 t
《金融学》是理论和实践兼具的经济管理类本科专业核心课程。本文总结在金融学课程教学的实践中,通过案例教学、金融实验教学、构建课程教学平台等一系列课堂教学探索和实践,有
AIM: An inherited deficiency of human lysosomal acid lipase (LAL) results in the rare conditions of Wolman disease and cholesteryl ester storage disease (CESD).
AIM: To study the effects of concentrated liquor from male zooid of Antheraea pernyi on immunological mice.METHODS: For each experiment, 40 mice were randomly d
针对医师资格实践技能考试中学生存在的问题,进行检体诊断学教学改革,提高学生临床实践能力,使学生毕业能顺利通过中医助理医师执业资格考试。