黄土高原沟谷地貌发育演化研究进展与展望
熊礼阳, 汤国安

Research Progresses and Prospects of Gully Landform Formation and Evolution in the Loess Plateau of China
XIONG Liyang, TANG Guoan
图1 沟谷地貌演化研究不同层次
Fig. 1 Different levels of gully landform evolution studies