陇东合水县塬梁峁地貌分类及演化
袁爽, 许强, 赵宽耀, 王绚, 王崔林

Geomorphological classification and evolution of plateau-beam-loess hills in Heshui county of the east Gansu province
YUAN Shuang, XU Qiang, ZHAO Kuanyao, WANG Xuan, WANG Cuilin
图10 合水县沟谷水系走向玫瑰花图
Fig. 10 Rose map of gully drainage system trend in Heshui county