FN Archimer Export Format
PT J
TI Long-term sediment decline causes ongoing shrinkage of the Mekong megadelta, Vietnam
BT 
AF TAMURA, Toru
   NGUYEN, Van Lap
   Oanh TA, Thi Kim
   BATEMAN, Mark D.
   GUGLIOTTA, Marcello
   ANTHONY, Edward J.
   NAKASHIMA, Rei
   SAITO, Yoshiki
AS 1:1,2;2:3;3:3;4:4;5:5;6:6,7;7:1;8:1,5;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 AIST, Geol Survey Japan, Tsukuba, Ibaraki 3058567, Japan.
   Univ Tokyo, Grad Sch Frontier Sci, Kashiwa, Chiba 2778561, Japan.
   VAST, HCMC Inst Resources Geog, Ho Chi Minh City, Vietnam.
   Univ Sheffield, Dept Geog, Sheffield S10 2TN, S Yorkshire, England.
   Shimane Univ, Estuary Res Ctr, Matsue, Shimane 6908504, Japan.
   Aix Marseille Univ, CNRS, Coll France, IRD,INRA,CEREGE, Aix En Provence, France.
   CNRS, USR LEEISA, Cayenne, French Guiana, France.
C2 AIST, JAPAN
   UNIV TOKYO, JAPAN
   VAST, VIETNAM
   UNIV SHEFFIELD, UK
   UNIV SHIMANE, JAPAN
   UNIV AIX MARSEILLE, FRANCE
   CNRS, FRANCE
UM LEEISA
IN WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 4.379
TC 40
UR https://archimer.ifremer.fr/doc/00656/76858/78081.pdf
   https://archimer.ifremer.fr/doc/00656/76858/78082.pdf
LA English
DT Article
AB Since the 1990s the Mekong River delta has suffered a large decline in sediment supply causing coastal erosion, following catchment disturbance through hydropower dam construction and sand extraction. However, our new geological reconstruction of 2500-years of delta shoreline changes show that serious coastal erosion actually started much earlier. Data shows the sandy coast bounding river mouths accreted consistently at a rate of +2 to +4 km(2)/year. In contrast, we identified a variable accretion rate of the muddy deltaic protrusion at Camau; it was<+1 km(2)/year before 1400 years ago but increased drastically around 600 years ago, forming the entire Camau Peninsula. This high level of mud supply had sharply declined by the early 20th century after a vast canal network was built on the delta. Since then the Peninsula has been eroding, promoted by the conjunction of mud sequestration in the delta plain driven by expansion of rice cultivation, and hysteresis of long-term muddy sedimentation that left the protrusion exposed to wave erosion. Natural mitigation would require substantial increases in sediment supply well above the pre-1990s levels. 
PY 2020
PD MAY
SO Scientific Reports
SN 2045-2322
PU Nature Publishing Group
VL 10
IS 1
UT 000562211800001
DI 10.1038/s41598-020-64630-z
ID 76858
ER

EF