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Based on the friction partition theory (Einstein 1942) and affections of breadth depth ratio on roughness(Knight 2002), the relationship between bed and wall roughness coefficient is researched though 28m flume experiment. The measured water level agree with the calculated one which supposed n = nb = nw. And it proves that bed roughness coefficient equal to wall roughness coefficient while the rectangle...
Basing on the field observation and investigation in steep gravel rivers in northwest of China, flow angle is an important parameter for calculating the local scour which directly related to the security of erosion protection structure and bridges. The movable bed flume experiment was designed to measure the local scour depth with varied flow angle under same flow and sediment conditions. About 8...
Ocean exploitation continues to be a major international growth area. In term of achieving marine sustainable development it is, therefore, the marine ecological carrying capacity influenced by many factors, need to be analyzed, addressed and monitored. The concept and influencing factors of marine ecological carrying capacity were discussed, and a method based on principle component analysis (PCA)...
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