A New Subsidence Map for Coastal Louisiana

GSA Today

Jaap H. Nienhuis¹ 

关键词: Geological Society of America;    GSA Today;    Groundwork;    Land subsidence;    Subsidence Map;    Louisiana coast;    J.H. Nienhuis;   

DOI  :  10.1130/GSATG337GW.1

学科分类：地质学

来源: Geological Society of America

【 摘 要 】

Coastal Louisiana has experienced catastrophic rates of wetland loss over the past century, equivalent in area to the state of Delaware. Land subsidence in the absence of rapid accretion is one of the key drivers of wetland loss. Accurate subsidence data should therefore form the basis for estimates of and adaptations to Louisiana’s future. Recently, Jankowski et al. (2017) determined subsidence rates at 274 sites along the Louisiana coast. Based on these data we present a new subsidence map and calculate that, on average, coastal Louisiana is subsiding at 9 ± 1 mm yr−1.

【 授权许可】

CC BY