Gender of large river deltas and parasitizing rivers
文献类型：SCI/SSCI论文
| 作者 | Wang Z. Y. ; Yu G. A. ; Huang H. Q. ; Wang R. Y. |
| 发表日期 | 2012 |
| 关键词 | Classification of deltas Male and female rivers Morphology River patterns Parasitizing river Yellow River lower mississippi river lower ebro river sea-level rise yangtze-river pearl river caspian sea nile delta sediment flux yellow-river volga delta |
| 英文摘要 | Deltas are the most dynamic part of large rivers and the characteristics of deltas reflect the basic nature of morphodynamics, ecology and anthropogenic influence. The authors investigated many deltas of large rivers, including the Yellow, Yangtze, Pearl, Rhine, Nile, Mississippi, Luanhe and Ebro rivers. Data were collected and sediment, water, benthic invertebrates and fish were sampled. Statistical analysis showed that deltas can be classified into male deltas and female deltas. The deltas of the Yellow, Mississippi, Luanhe, Ural and Ebro rivers are male deltas. Male deltas extend into the ocean, each with only one or two channels, forming a fan-shape. Its development process is accompanied with periodic nodal or random avulsions. Male deltas develop if the sediment load/water ratio is high and the tidal range is low. The deltas of the Yangtze, Rhein-Meuse-Scheldt, Pearl and Irrawaddy rivers are female. Female deltas consist of complex channel networks and numerous bars and islands. Female deltas develop if the load/water ratio is not high and tidal current is relatively strong. Female deltas provide stable and multiple habitats for various bio-communities. Therefore, the biodiversity of female deltas and the taxa richness of benthic invertebrates and fish are much higher than that of male deltas. Human activities reduced sediment load and change the delta gender from male to female. Male rivers have high levees in their lower reaches and estuary. Several rivers originate from the levees of a male river and flow parallel with the river into the sea. Appearance, persistence, length and stability of these rivers depend on the male river to which they are attached. Therefore, these rivers are named parasitizing rivers. In general, parasitizing rivers have no tributaries and almost no drainage area. The runoff of these rivers comes from the rainfall on the surrounding area, and therefore, the flow discharge exhibits very sharp peaks during rainfall. The Yellow and Luanhe rivers have many parasitizing rivers. Some of the parasitizing rivers are quite long, with a length of 400-500 km, such as the Tuhai River and Majia River. Management of parasitizing rivers must be integrated into management strategies of their father rivers. |
| 出处 | International Journal of Sediment Research |
| 卷 | 27 |
| 期 | 1 |
| 页 | 18-36 |
| 收录类别 | SCI |
| ISSN号 | 1001-6279 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/26754]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Wang Z. Y.,Yu G. A.,Huang H. Q.,et al. Gender of large river deltas and parasitizing rivers. 2012. |
入库方式： OAI收割
来源：地理科学与资源研究所
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