| 2 | CONTRIBUTIONS OF TUNNEL EROSION TO SEDIMENT YIELD IN A SEMI-ARID BASIN IN THE LOESS PLATEAU OF CHINA显示文摘To evaluate the geomorphic significance of piping and tunnel erosion in basin sediment yield in semiarid areas, we conducted a field monitoring program in Yangdaogou, a subbasin in the hilly loess region in the Loess Plateau of China in 1989 and 1990. Six tunnel systems were monitored through fifteen flow events. Overall, 57% of total basin sediment was routed through tunnel systems and net tunnel erosion accounted for about 25% of total sediment production of the basin. This study suggests that tunnel erosion can be highly significant in basin sediment delivery and hillslope development in send-arid areas. | T.X. ZHU, Q.G. CAI and S.H.LUK3 Dr., Department of Geography, University of Minnesota-Duluth, Duluth, MN55812, USA. Tel: 218-724-8480. Fax: 218-726-6386. Email: tzhu@d.umn.edu Researcher, Institute of Geography, Chinese Academy of Sciences, Beijing, 100 | 2000 | International Journal of Sediment Research2000，15，4： | 0 |
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