Retrieving "Point Bar" from the archives

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1. Fluvial (system)

   Linked via "point bar"

   Meandering Systems
   Meandering rivers develop rhythmic curves due to positive feedback loops between flow velocity and bank erosion. Water velocity is maximized on the outer bank (the cut bank), causing erosion, while deposition occurs on the inner bank, forming a point bar. The wavelength ($\lambda$) and amplitude ($A$) of meanders are mathematically related, often approximated by:
   $$\lambda \approx 10.5 \cdot Q_{\text{mean}}^{0.33}$$

2. Sediment Deposition

   Linked via "Point bars"

   Alluvial and Fluvial Systems
   Fluvial deposition is controlled by channel competence. Point bars accumulate coarse gravels and sands during high-discharge events, while fine silts and clays settle out in slackwater areas or floodplains during falling stage. The efficiency of floodplain deposition is heavily moderated by the presence of riparian root structures, which create small, localized [gravitational singularities](/entries/gravitational-s…