| 无定河上游河道对沙漠化的阻截效应 | 
| 颜明, 张应华, 贺莉, 程维明, 王随继, 许炯心 | 
| Blocking effect of upper reaches of Wuding River on desertification | 
| Ming Yan, Yinghua Zhang, Li He, Weiming Cheng, Suiji Wang, Jiongxin Xu | 
| 图3 风沙和沙黄土的粒度累积百分数(A)及中值粒径分布(B) | 
| Fig.3 Cumulative curve of particle size percentage (A) and median particle size distribution diagram (B) of aeolian sand and sandy loess | 
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