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The variation characteristics of runoff and sediment transport in main hydrologic stations of the Dongting lake was analyzed by methods of mathematical statistics, Mann-Kendall, wavelet analysis and accumulating filter from 1956 to 2008. The results show that: (1) the water and sediment entering Dongting Lake are mainly from four rivers of Hunan and the three outlets of Jinjiang River, respectively,...
River channel geomorphologic evolution is the basis of flood control and regulation. With the information of satellite images and field investigation, the article emphatically analyzes the geomorphologic evolution characteristics and stability of meandering channels and gooseneck-bifurcated channel, both of which are the most typical and unstable types in the middle and lower Yangtze River. Evolution...
This paper wants to explore a key technique of identifying and locating the sand exploitation ships using ASAR images. Chenglingji of Yangtze River is selected as the research region. One software module was developed with the IDL (Interactive Data Language) which is a facing matrix, simple visual language. This paper researches on some key techniques based on ASAR images such as filtering and noise...
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