期刊论文

中文

中南林业科技大学学报

1673-923X

2014

34

12

124-129

10.14067/j.cnki.1673-923x.2014.12.022

(2011BAC09B08-07):国家科技支撑计划“西南生态安全屏障决策体系”

本校为第一机构

根据若尔盖县4次土地沙化监测数据和野外调查资料，对若尔盖县沙化现状及其沙化发展动态特征进行研究。结果表明：若尔盖土地沙化发展非常迅速，2009年的沙化面积是1994年的4.5倍；以沙化程度划分可分为轻度、中度、重度、极重度等4个不同沙化程度等级，其中轻度沙化地占68.93%～75.42%,以沙地类型划分可分为流动沙地、半固定沙地、固定沙地、露沙地等4个沙地类型，露沙地占75.15%～79.63%,根据土地利用划分可分为草地、林业用地、耕地和未利用沙化地，其中沙化草地占78.11%～85.74%；流动沙地、半固定沙地、固定沙地和露沙地年平均扩增速率分别为8.03%、10.34%、13.67%和11.56%，不同用途土地沙...

Based on the data of field experiments and four times data of land desertification monitoring, the status quo of land desertification and dynamic characteristics of desertification development in Ruoergai County, Sichuan province were investigated. The results show that the land desertification in Ruoergai County had been very quickly developing, the desertification area in 2009 is 4.5 times of in 1994; The desertification degree can be divided into 4 different levels, slight, moderate, severe potential and extremely severe, with mild desertifi...