TY - JOUR
T1 - The Longitudinal Profile of a Prograding River and Its Response to Sea Level Rise
AU - Gao, Weilun
AU - Li, Dongxue
AU - Wang, Zhengbing
AU - Nardin, William
AU - Shao, Dongdong
AU - Sun, Tao
AU - University, Beijing
AU - Cui, Baoshan
PY - 2020
Y1 - 2020
N2 - River longitudinal profile, a key morphological characteristic of the river channel, is subject to river mouth progradation. Given the increasing influence of human activities and climate change on this critical downstream control, understanding its effects on the evolution of the longitudinal profile is imperative. A general theoretical framework is proposed to quantify the relevant effects, which is tested by numerical experiment and compared with field, numerical and laboratory data from the literature. The results suggest the existence of a critical ratio of accommodation space to sediment supply of approximately 0.5, above which the typical concave upward profile tends to form. Further analyses show that sea level rise tends to increase the concavity of the longitudinal profile of a river with a relatively low equilibrium bed slope and progradation rate.
AB - River longitudinal profile, a key morphological characteristic of the river channel, is subject to river mouth progradation. Given the increasing influence of human activities and climate change on this critical downstream control, understanding its effects on the evolution of the longitudinal profile is imperative. A general theoretical framework is proposed to quantify the relevant effects, which is tested by numerical experiment and compared with field, numerical and laboratory data from the literature. The results suggest the existence of a critical ratio of accommodation space to sediment supply of approximately 0.5, above which the typical concave upward profile tends to form. Further analyses show that sea level rise tends to increase the concavity of the longitudinal profile of a river with a relatively low equilibrium bed slope and progradation rate.
UR - http://www.scopus.com/inward/record.url?scp=85095932000&partnerID=8YFLogxK
U2 - 10.1029/2020GL090450
DO - 10.1029/2020GL090450
M3 - Article
SN - 0094-8276
VL - 47
SP - 1
EP - 9
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 21
M1 - e2020GL090450
ER -