Dynamic Process of Aeolian-fluvial Interaction Erosion in the Middle Reaches of Baerdong River in Ten-watershed,Inner Mongolia of China
Dynamic Process of Aeolian-fluvial Interaction Erosion in the Middle Reaches of Baerdong River in Ten-watershed,Inner Mongolia of China
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发表时间：
2013
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通讯作者：
Li Shuang-quan
中科院分区：
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作者：
Li Shuang-quan
研究区位于内蒙古十流域巴尔东河中游地区，本文采用野外调查、气象观测、径流图试验、地形测量和“3S”技术等手段，识别风水相互作用侵蚀动态过程，以侵蚀荷载作为风水侵蚀强度的衡量指标，结果表明，风水侵蚀量之比约为1.8∶1，平均侵蚀速率为2010年0.1 kg·m-2。风季风将泥沙带入风河相互作用系统，雨季洪水带走系统输出的泥沙。泥沙输出量和形态受风河相互作用系统内侵蚀、搬运、堆积循环过程的影响。由于风小雨多，东岸稳定，西岸凸边变窄，凹边变宽。 1998-2010年河岸波动较大，河岸沙丘后退，阶地沟壑继续发育，水力侵蚀对风河相互作用的影响更大。
The study area is located in the middle reaches of Baerdong River in Ten-watershed of Inner Mongolia.Field investigation,meteorological observation,runoff plot experiment,topographic survey and "3S" technology were applied to identify the dynamic process of aeolian-fluvial interaction erosion in the paper.The erosion load was used as a measurement index of the intensity of wind and water erosion.The results showed that the ratio of erosion amount made by wind and water was about 1.8∶1 and the mean erosion rate was 0.1 kg·m-2 in 2010.The wind drove the sediment into the aeolian-fluvial interaction system in the windy season,and the flood took the sediment output from the system in the rainy season.The export amount and form of sediment was influenced by the cycle process of erosion,transport and accumulation within the aeolian-fluvial interactions system.Because of little wind and much rainfall,the east bank was stable while the convex side became narrow and the concave side widened in the west bank in 1998-2010.The swing of the channel became larger,the sand dune on the river bank retreated and the gullies in the terrace continued developing.The contribution of water erosion had more impact on the aeolian-fluvial interaction.