KOPRI Repository

High-resolution comparison of sediment dynamics under different forcing conditions in the bottom boundary layer of a shallow, micro-tidal estuary

Cited 5 time in scopus
Metadata Downloads
Title
High-resolution comparison of sediment dynamics under different forcing conditions in the bottom boundary layer of a shallow, micro-tidal estuary
Other Titles
경계층내부에서 발생하는 퇴적역학의 고해상도 비교 연구
Authors
K. Park
Ha, Ho Kyung
Subject
Oceanography
Keywords
ADCP; Bottom boundary layer; Sediment dynamics; Suspended sediment concentrati
Issue Date
2012
Publisher
AGU
Citation
K. Park, Ha, Ho Kyung. 2012. "High-resolution comparison of sediment dynamics under different forcing conditions in the bottom boundary layer of a shallow, micro-tidal estuary". JOURNAL OF GEOPHYSICAL RESEARCH, 117(C6): 1-14.
Abstract
Data for high-resolution profiles of current velocity and suspended sediment concentration (SSC) were collected in bottom boundary layer (BBL). The data were used to study the vertical and temporal varaibility in SSC under various forcing conditions of tide, wind and freshwater discharge. During the winter stormy season, the background SSC was low (0.015?0.03 g l- 1). An episodic storm-induced erosion/resuspension was responsible for the short-lasting high SSC in BBL. During the spring flooding period, the background SSC was relatively high (0.04?0.07 g l- 1) likely due to the large amount of suspended sediment from the fluvial input and bed softening, and the contribution of wind forcing to sediment resuspension was somewhat enhanced by the destratification in BBL. When the freshwater discharge was extremely high (> 5000 m3 s-1), the entire water column in shallow areas was influenced by freshwater input. Therefore, the thermohaline anomaly’s contribution to the stratification considerably weakened, while the SSC’s contribution strengthened. When the freshwater discharge was relatively low (< 5000 m3 s- 1), a critical wind stress for sediment erosion (0.08?0.1 Pa) was observed to abruptly increase the SSC.ing conditions of tide, wind and freshwater discharge. During the winter stormy season, the background SSC was low (0.015?0.03 g l- 1). An episodic storm-induced erosion/resuspension was responsible for the short-lasting high SSC in BBL. During the spring flooding period, the background SSC was relatively high (0.04?0.07 g l- 1) likely due to the large amount of suspended sediment from the fluvial input and bed softening, and the contribution of wind forcing to sediment resuspension was somewhat enhanced by the destratification in BBL. When the freshwater discharge was extremely high (> 5000 m3 s-1), the entire water column in shallow areas was influenced by freshwater input.
URI
http://repository.kopri.re.kr/handle/201206/5790
DOI
http://dx.doi.org/10.1029/2012JC007878
Files in This Item
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    qrcode

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

    Browse