TY - JOUR
T1 - Spatial and seasonal impacts of submerged aquatic vegetation (SAV) drag force on hydrodynamics in shallow waters
AU - Moki, Hirotada
AU - Taguchi, Koichi
AU - Nakagawa, Yasuyuki
AU - Montani, Shigeru
AU - Kuwae, Tomohiro
N1 - Funding Information:
We acknowledge the Japan Meteorological Agency (JMA) for the use of astronomical tide-level data http://www.data.jma.go.jp/gmd/kaiyou/db/tide/suisan/suisan.php?stn=NM (last access date: 18 October 2019). Meteorological data were also obtained from the JMA website http://www.data.jma.go.jp/gmd/risk/obsdl/index.php (last access date: 18 October 2019). We thank K. Watanabe, T. Tokoro, S. Shibanuma, T. Moriyama, D. Adachi, Y. Aiuchi and H. Saito for help with measurements in the field; and we thank D. Naito, T. Ohmi, K. Hata and T. Ichikawa for assistance with model development. We also thank K. Nakata and T. Tanaya for helpful comments on this study.
Publisher Copyright:
© 2020 The Authors
PY - 2020/9
Y1 - 2020/9
N2 - Submerged aquatic vegetation (SAV) such as seagrass alters hydrodynamics as a drag force. Many studies have investigated the SAV drag force, but the time scales studied have been short (several days to a few weeks), ignoring seasonal variation, and the spatial scales have been small (several meters). Here, we performed field research and developed a new physical model incorporating seasonally varying SAV morphology (leaf length, leaf width, and shoot density) to investigate the effects of SAV drag force on the current field. We found that SAV attenuated the current velocity 50–70% during the 5-month computational period. Furthermore, the model showed a clear negative relationship between the leaf area index calculated from SAV morphology and current velocity. The physical model developed in this study can facilitate more accurate quantification of organic matter burial rates and the estimation of blue carbon sequestration by considering the SAV drag force.
AB - Submerged aquatic vegetation (SAV) such as seagrass alters hydrodynamics as a drag force. Many studies have investigated the SAV drag force, but the time scales studied have been short (several days to a few weeks), ignoring seasonal variation, and the spatial scales have been small (several meters). Here, we performed field research and developed a new physical model incorporating seasonally varying SAV morphology (leaf length, leaf width, and shoot density) to investigate the effects of SAV drag force on the current field. We found that SAV attenuated the current velocity 50–70% during the 5-month computational period. Furthermore, the model showed a clear negative relationship between the leaf area index calculated from SAV morphology and current velocity. The physical model developed in this study can facilitate more accurate quantification of organic matter burial rates and the estimation of blue carbon sequestration by considering the SAV drag force.
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U2 - 10.1016/j.jmarsys.2020.103373
DO - 10.1016/j.jmarsys.2020.103373
M3 - Article
AN - SCOPUS:85085237547
SN - 0924-7963
VL - 209
JO - Journal of Marine Systems
JF - Journal of Marine Systems
M1 - 103373
ER -