So far most of the researchers regard river channel pattern formation as a deterministic problem, but a few begin to treat it as a probabilistic one. For the study of the areal distribution of river channel patterns, ...So far most of the researchers regard river channel pattern formation as a deterministic problem, but a few begin to treat it as a probabilistic one. For the study of the areal distribution of river channel patterns, we put forward the concept of river channel pattern frequency which can be defined展开更多
Since the geoecological approach was widely introduced into geomorphologicalstudies, a new trend characterized by this approach has been formed in thegeomorphological research frontier. Starkel has applied the concept...Since the geoecological approach was widely introduced into geomorphologicalstudies, a new trend characterized by this approach has been formed in thegeomorphological research frontier. Starkel has applied the concept of river drainagebasin geoecosystem to the study of paleo-patterns of rivers and concluded that thechanges in the river channel patterns can be regarded as the expression of展开更多
River channel pattern transformation is dealt with in a broad background of suspended sediment concentration, varying from low, medium, high to hyperconcentration. Based on data from about 100 alluvial rivers in China...River channel pattern transformation is dealt with in a broad background of suspended sediment concentration, varying from low, medium, high to hyperconcentration. Based on data from about 100 alluvial rivers in China, suspended sediment transport rate has been plotted against mean annual water discharge, showing that all points can be divided into four belts by three straight lines, as stable braided pattern, meandering pattern with ordinary sediment concentrations, wandering braided pattern, and meandering pattern with hyperconcentration of sediment. This picture of channel pattern transformation can be well explained by the law of the water flow’s energy expenditure varying with its sediment concentration. The energy expenditure increases with sediment concentration, reaching a maximum, then declines. Rivers falling in different ranges of sediment concentrations adjust their own energy expenditure in different manners, leading to occurrence of different channel patterns.展开更多
It is generally accepted by research workers both in China and abroad at present that wandering braided river channel pattern forms under such conditions that the sediment transportation is not in equilibrium and a st...It is generally accepted by research workers both in China and abroad at present that wandering braided river channel pattern forms under such conditions that the sediment transportation is not in equilibrium and a strong aggradation occurs. Sometimes a展开更多
基金Project supported by the Youth Scientific Foundation of Academia Sinica.
文摘So far most of the researchers regard river channel pattern formation as a deterministic problem, but a few begin to treat it as a probabilistic one. For the study of the areal distribution of river channel patterns, we put forward the concept of river channel pattern frequency which can be defined
基金Project supported by the National Natural Science Foundation of China.
文摘Since the geoecological approach was widely introduced into geomorphologicalstudies, a new trend characterized by this approach has been formed in thegeomorphological research frontier. Starkel has applied the concept of river drainagebasin geoecosystem to the study of paleo-patterns of rivers and concluded that thechanges in the river channel patterns can be regarded as the expression of
文摘River channel pattern transformation is dealt with in a broad background of suspended sediment concentration, varying from low, medium, high to hyperconcentration. Based on data from about 100 alluvial rivers in China, suspended sediment transport rate has been plotted against mean annual water discharge, showing that all points can be divided into four belts by three straight lines, as stable braided pattern, meandering pattern with ordinary sediment concentrations, wandering braided pattern, and meandering pattern with hyperconcentration of sediment. This picture of channel pattern transformation can be well explained by the law of the water flow’s energy expenditure varying with its sediment concentration. The energy expenditure increases with sediment concentration, reaching a maximum, then declines. Rivers falling in different ranges of sediment concentrations adjust their own energy expenditure in different manners, leading to occurrence of different channel patterns.
基金Project supported by the National Natural Science Foundation of China
文摘It is generally accepted by research workers both in China and abroad at present that wandering braided river channel pattern forms under such conditions that the sediment transportation is not in equilibrium and a strong aggradation occurs. Sometimes a
