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. 2020 Sep 14;117(39):24138–24143. doi: 10.1073/pnas.1919217117

Fig. 4.

Fig. 4.

The evolution of deltas and coastal plains. (A) Topography of representative deltas and coastal areas in China, Vietnam, and Thailand. (A1) Pearl River Delta (China); (A2) Song Hong Delta (Vietnam); (A3) Mekong River Delta (Vietnam); (A4) Chao Phraya Delta (Thailand); (A5) Fuzhou Basin (China); (A6) Han River Delta (Upper) and Lian River Delta (Lower) (China); (A7) Haifeng plain (China); and (A8) Songkhla-Pattalung plain (Thailand). Locations of the deltas and coastal areas are also shown in Fig. 1. Estimated paleoshorelines around 6 to 5 ka are shown for the Pearl River Delta (29), the Song Hong Delta (30), the Mekong River Delta (31), and the Chao Phraya Delta (32). See SI Appendix, Tables S1 and S2 for sediment core information. (B) Approximate area of freshwater lowlands emerged after 5 ka in large deltas. (C) Change over time in sediment depositional environment, as indicated by multiple proxies. (D) Sediment accretion curves (age–depth plots) for representative major deltas. See Materials and Methods for additional information.