期刊
GEO-MARINE LETTERS
卷 40, 期 6, 页码 897-909出版社
SPRINGER
DOI: 10.1007/s00367-019-00610-1
关键词
Equatorial coast; Coastal erosion; Landsat images; Multitemporal analysis
资金
- Higher Education Personnel Improvement Coordination (CAPES)
- National Council for Scientific and Technological Development (CNPq) [PQ 311413/2016-1]
- project VALSA (CAPES PVE S)
This study aimed to quantify the morphological variations of the tropical mesotidal barrier-spit systems (MBs) in Northeast Brazil to understand their evolution. Therefore, Landsat 5 TM and Landsat 8 OLI images were used to construct two multitemporal analyses: one in 4-year intervals (low frequency) and another in 1-year intervals (high frequency). The results revealed that the coastal dynamic was so intense that only high-frequency analysis could represent its evolutionary behavior. Low-frequency analysis, on the other hand, could lead to the misinterpretation of the data. Despite the strong coastal dynamic, there was a long-term equilibrium in the areas occupied by the MBs. Furthermore, regarding evolutionary behavior, there were two different types of MBs: migrant and stationary. Migrant MB movement resulted from the joint actions of the meteo-oceanographic forcings that generally push the whole barrier westward, conserving its shape. The migration rate can reach 100 m per year. This process represents the visible and massive movement of sediment along the shore. The changes observed in most MBs, whether migrant or stationary, reflect their ephemeral nature and must serve as a warning for human interventions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据