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出 处:《中国农村水利水电》2008年第6期13-16,共4页China Rural Water and Hydropower
基 金:科学技术部科研院所社会公益研究专项资助(2004-DIB4J169)
摘 要:泥沙淤积与利用问题已成为引黄灌区持续发展与发挥长期效益的关键。阐述了当前引黄灌区泥沙灾害的表现形式,通过分析不同粒径泥沙在渠道中的运动、输移、和淤积规律,认为粗颗粒泥沙是渠道淤积和造成灾害的主要原因。由于粗、细泥沙在物理性质和利用方式上存在明显差异,应采用不同方法实现其资源化:对粗颗粒泥沙由集中处理改为分散处理,减少渠首部位的淤积;细沙进行长距离输送,引浑水淤灌,提高入田比例。Several forms of sediment disasters in irrigation districts along the Lower Yellow River are discussed in this paper. The movement and transport characteristics of sediment with different grain sizes and their effect on deposition are analyzed. It is pointed out that deposition in canals and its disasters are mainly caused by coarse particles. Based on difference in physical properties of soil and availability, coarse and fine sediment should be treated and utilized by different methods. Scattering the coarse materials replace centralized treatment to reduce deposition around the head and main canal of irrigation areas. The fine silt increase percent of entering farmland by long-distance transportation.
分 类 号:TV146[水利工程—水力学及河流动力学]
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