A GENETIC CLASSIFICATION OF FLOODPLAINS
A GENETIC CLASSIFICATION OF FLOODPLAINS
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DOI：
10.1016/0169-555x(92)90039-q
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发表时间：
1992-04-01
期刊：
影响因子：
3.9
通讯作者：
CROKE, JC
中科院分区：
文献类型：
--
作者：
NANSON, GC;CROKE, JC
洪泛区是由河流过程复杂的相互作用形成的，但它们的特征和演化本质上是河流动力和沉积物特征的产物。河流夹带和输送沉积物的能力与形成河道边界的漫滩冲积层的耐侵蚀性之间的关系为漫滩的成因分类提供了基础。公认的三类：（1）高能非粘性； (2)中能非粘性； (3) 低能量粘性洪泛区。十三个导数阶和子阶。从高能环境中的受限、粗粒度、非粘性洪泛区到低能环境中的无侧限细粒度、粘性洪泛区，是根据九个因素（主要是洪泛区形成过程）来定义的。这些因素导致了独特的地貌特征（例如滚动条或广泛的后沼泽），这些特征在成因和最终形态方面区分了每种洪泛区类型。最后，提出这样的建议。由于洪泛区是母河系统的衍生物，随着时间的推移，重大的环境变化将导致一种洪泛区类型向另一种类型的可预测转变。
Floodplains are formed by a complex interaction of fluvial processes but their character and evolution is essentially the product of stream power and sediment character. The relation between a stream's ability to entrain and transport sediment and the erosional resistance of floodplain alluvium that forms the channel boundary provides the basis for a genetic classification of floodplains. Three classes are recognised: (1) high-energy non-cohesive; (2) medium-energy non-cohesive; and (3) low-energy cohesive floodplains. Thirteen derivative orders and suborders. ranging from confined, coarse-grained, non-cohesive floodplains in high-energy environments to unconfined fine-grained cohesive floodplains in low-energy environments, are defined on the basis of nine factors (mostly floodplain forming processes). These factors result in distinctive geomorphological features (such as scroll bars or extensive backswamps) that distinguish each floodplain type in terms of genesis and resulting morphology. Finally, it is proposed that. because floodplains are derivatives of the parent stream system, substantial environmental change will result in the predictable transformation of one floodplain type lo another over time.