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