摘要
在GIS技术的支撑下实现了三江源冻融侵蚀区范围的界定,然后选取气温年较差、坡度、坡向、植被覆盖度、年降水量等因素作为强度评价指标,提出了适合三江源区的冻融侵蚀强度评价标准,并借助GIS技术完成了三江源区冻融侵蚀强度评价。结果表明:三江源冻融侵蚀区分布范围广,区域分异特征明显;冻融侵蚀强度分布不一,高强度冻融侵蚀主要分布在地形起伏较大的山区,而低强度冻融侵蚀则主要分布在地势较平坦区。
The paper achieves the definition of the range of freeze-thaw erosion area at the Three-River-Source Area with the support of GIS technique.It puts forward evaluation standards of intensity of freeze-thaw erosion which suits the condition of the area by taking the factors of annual temperature range,slope,slope direction,vegetation coverage and annual precipitation as indexes,and completes the evaluation of intensity of freeze-thaw erosion with the support of GIS technique.The outcomes show that a) the distribution range of freeze-thaw erosion at the area is wide and the characteristics of regional differentiation obvious and;b) the distribution of intensity of freeze-thaw erosion is different.The high erosion intensity mainly distributes in mountainous region with terrain undulation and the low erosion intensity mainly distributes in the relatively leveled area.
出处
《中国水土保持》
北大核心
2011年第4期41-43,69,共3页
Soil and Water Conservation in China
基金
国家自然科学基金项目(40671179)
关键词
GIS
冻融侵蚀
强度评价
三江源区
GIS
Three-River-Source Area
freeze-thaw erosion
intensity evaluation
