Investigation of temporal-spatial distribution patterns of residual water level under the influence of tide-river interaction in the Modaomen Estuary, Zhujiang River

Cai Huayang; Yang Hao; Guo Xiaojuan; Yang Qingshu; Ou Suying

doi:10.3969/j.issn.0253-4193.2018.07.005

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Cai Huayang, Yang Hao, Guo Xiaojuan, Yang Qingshu, Ou Suying. Investigation of temporal-spatial distribution patterns of residual water level under the influence of tide-river interaction in the Modaomen Estuary, Zhujiang River[J]. Haiyang Xuebao, 2018, 40(7): 55-65. doi: 10.3969/j.issn.0253-4193.2018.07.005

Citation:

Cai Huayang, Yang Hao, Guo Xiaojuan, Yang Qingshu, Ou Suying. Investigation of temporal-spatial distribution patterns of residual water level under the influence of tide-river interaction in the Modaomen Estuary, Zhujiang River[J]. Haiyang Xuebao, 2018, 40(7): 55-65. doi: 10.3969/j.issn.0253-4193.2018.07.005

Citation:

Cai Huayang, Yang Hao, Guo Xiaojuan, Yang Qingshu, Ou Suying. Investigation of temporal-spatial distribution patterns of residual water level under the influence of tide-river interaction in the Modaomen Estuary, Zhujiang River[J]. Haiyang Xuebao, 2018, 40(7): 55-65. doi: 10.3969/j.issn.0253-4193.2018.07.005

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Investigation of temporal-spatial distribution patterns of residual water level under the influence of tide-river interaction in the Modaomen Estuary, Zhujiang River

doi: 10.3969/j.issn.0253-4193.2018.07.005

Institute of Estuarine and Coastal Research, School of Marine Sciences, Sun Yat-sen University, Guangzhou 510275, China;State and Local Joint Engineering Laboratory of Estuarine Hydraulic Technology, Guangzhou 510275, China

Received Date: 2017-09-23
Rev Recd Date: 2018-01-16

Abstract

Abstract

In this study, the temporal-spatial distribution patterns of residual water level under the influence of nonlinear tide-river interaction in the Modaomen Estuary was explored by means of a one-dimensional analytical model for tidal river hydrodynamics. Model results showed that the distribution patterns of residual water level were characterized by an apparent spring-neap cycle and a dry-flood change. In particular, for the dry season, the residual water level was featured by significant spring-neap cycle, with values ranging between 0 and 0.4 m. On the other hand, the magnitude of residual water level in the flood season is one-order larger than that in the dry season (ranging between 0 and 6 m) and is closely related to the freshwater discharge imposed at the upstream end. With analytical model, it is possible to decompose the residual water level into different components, linking to tide, river and tide-river interaction, respectively. It was shown that, during the dry season, the residual water level was mainly controlled by the tidal forcing in the downstream reach of the Modaomen Estuary, while it was impacted by both the tide and river flow in the upstream part. For the flood season, the model results showed that the residual water level was mainly determined by the river flow for the whole estuary.
- Modaomen Estuary,
- residual water level,
- tide-river interaction,
- analytical model

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References(22)

References

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