Hu Gang, Wu,,,, Wei Xin. Characteristics of shallow gully erosion in Mangang black soil region of Northeast China. Geographical Science, 29, 2009 (4): 545-549 Hu Gang, Wu,,, Liu Honghu. Characteristics of gully erosion in Mangang black soil region of Northeast China. Journal of Geography, 2009. 62 (11):1165-1173 Hu Gang, Wu,, Wei Xin. Discussion on critical model of shallow gully landform in manchuan mangang black soil region. Geographical science, 2000. Wu. A summary of the research on the criticality of gully erosion (gully cutting) landform. Journal of Mountain Areas, 2005,23 (5): 565-570. Hu Gang, Wu,,. Preliminary study on short-term gully erosion based on GPS and GIS. Journal of Soil and Water Conservation, 2004, 18 (4): 650. Guo Jianying. Water balance in the characteristic period of Huahai Lake. Glacial permafrost, 2003,25 (5): 485-490 Hu Gang, Wang Naiang, Gao Shunwei, Li Qiaoling, Zhao Qiang, Guo Jianying. Discovery of Holocene Paleoaeolian Sand in Huahai Lake and Its Paleoenvironmental Interpretation: China Desert, 2002,22 (2):159. Li Qiaoling. Grain-size characteristics of ancient sand in Huahai Lake and its environmental significance: Acta Sedimenta Sinica, 200 1, 19 (4): 642-647 Li Qiaoling, Wang Naiang and Hu Gang. Quantitative Evaluation of Tourism Resources in the Historic and Cultural City of Wuwei [J]. Journal of Lanzhou University (Social Science Edition), 2002,30 (5). Zhao Qiang, Hu Gang, et al. Climatic and cultural background of desertification in Hexi Corridor since 2KaBP [J]. China Desert, 2003,23 (1): 95-100.