Unlike other river patterns, the anabranched pattern is rarely studied before although Lane has already mentioned about it in 1957. The most eminent features of the anabranched pattern are that there are always some i...Unlike other river patterns, the anabranched pattern is rarely studied before although Lane has already mentioned about it in 1957. The most eminent features of the anabranched pattern are that there are always some islands developed in the alluvial rivers and thus several stable flow courses always exist correspondingly.This is quite different from the unstable islands and randomly changed flow courses in braided rivers. Since the anabranched river pattern is the most typical one in the middle and lower reaches of the Yangtze River (Changjiang) as well as in many other rivers in China, a systematic study on the formation cause of the anabranched river pattern has been made in recent years, including field observations, modeling experiments in four river models under different boundary conditions, the analyses of river pattern formation and transformation etc. In the present paper, some of the detailed results obained by the writer will be discussed.展开更多
文摘Unlike other river patterns, the anabranched pattern is rarely studied before although Lane has already mentioned about it in 1957. The most eminent features of the anabranched pattern are that there are always some islands developed in the alluvial rivers and thus several stable flow courses always exist correspondingly.This is quite different from the unstable islands and randomly changed flow courses in braided rivers. Since the anabranched river pattern is the most typical one in the middle and lower reaches of the Yangtze River (Changjiang) as well as in many other rivers in China, a systematic study on the formation cause of the anabranched river pattern has been made in recent years, including field observations, modeling experiments in four river models under different boundary conditions, the analyses of river pattern formation and transformation etc. In the present paper, some of the detailed results obained by the writer will be discussed.
