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Unravelling the conundrum of river response to rising sea‐level from laboratory to field. Part I: Laboratory experiments
Author(s) -
PARKER GARY,
MUTO TETSUJI,
AKAMATSU YOSHIHISA,
DIETRICH WILLIAM E.,
LAUER J. WESLEY
Publication year - 2008
Publication title -
sedimentology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.494
H-Index - 108
eISSN - 1365-3091
pISSN - 0037-0746
DOI - 10.1111/j.1365-3091.2008.00961.x
Subject(s) - marine transgression , deglaciation , geology , sea level , river mouth , delta , sea level rise , post glacial rebound , sediment , abandonment (legal) , river delta , transgressive , new guinea , sediment transport , oceanography , holocene , geomorphology , climate change , structural basin , law , sedimentary depositional environment , engineering , ethnology , aerospace engineering , political science , history
The most recent deglaciation resulted in a global sea‐level rise of some 120 m over approximately 12 000 years. In this Part I of two parts, a moving boundary numerical model is developed to predict the response of rivers to this rise. The model was motivated by experiments at small scale, which have identified two modes describing the transgression of a river mouth: autoretreat without abandonment of the river delta (no sediment starvation at the topset–foreset break) and sediment‐starved autoretreat with abandonment of the delta. In the latter case, transgression is far more rapid and its effects are felt much further upstream of the river mouth. The moving boundary numerical model is checked against experiments. The generally favourable results of the check motivate adaptation of the model to describe the response of the much larger Fly‐Strickland River system, Papua New Guinea to Holocene sea‐level rise; this is done in the companion paper, Part II.