摘要
从河床冲淤、断面变化等方面,对白茆小沙近年来的演变、变化趋势及其影响进行分析。研究认为,受来水来沙条件变化、涨落潮水流流路分离影响和人为干扰等因素的作用,近年来白茆小沙的演变特征为上沙体滩面高程降低、尾部冲刷上提、下沙体冲失;预计白茆小沙将处于自然变化状态,但其变化将逐渐趋缓。白茆小沙的整治作为规划治理中的一部分,在下沙体的冲失后,已经失去治理的最佳时机。建议加强观测,以便分析其演变对河势及周边涉水工程的影响。
The evolution of Baimaoxiaosha in recent years, changes in trends and their implications are analyzed in terms of riverbed erosion and section changes. Studies suggest that because of runoff and sediment conditions change, ebb and flow passage separating and human disturbance, the overall evolution of Baimaoxiaosha appears that the sandy surface elevation reduces in the upper sand and the tail-part lifts, and the lower sand is washed out. It is expected that Baimaoxiaosha would be in a natural state of change, but the change will gradually slow down. After washout of the lower sand, the best chance for regulations lost. It is suggested to strengthen observation to analyze the impact on the river regime and water engineering nearby.
出处
《水运工程》
北大核心
2015年第12期80-85,共6页
Port & Waterway Engineering
基金
江苏省水利科技项目(2015004)
关键词
长江
徐六泾
新通海沙
白茆小沙
下沙体
河床演变
河道治理
the Yangtze River
Xuliujing section
Xintonghai shoal
Baimaoxiaosha
lower shoal
bed evolution
river regulation
