Investigation of temporal-spatial distribution patterns of residual water level under the influence of tide-river interaction in the Modaomen Estuary, Zhujiang River
-
摘要: 本文通过构建径潮动力耦合条件下潮波传播的一维水动力解析模型,从理论机制上探讨珠江磨刀门河口径潮动力非线性作用下余水位的多时空尺度变化。结果表明:余水位变化呈现明显的大小潮和洪枯季变化,枯季余水位大小潮的变化幅度介于0~0.4 m,而洪季余水位与上游径流紧密相关,增幅大枯季一个量级(介于0~6 m);解析模型可分离控制余水位变化的3个主要因素,即径流、潮流和径潮相互作用因子,计算结果表明河口不同区段余水位的主控因素有明显的洪枯季变化,上游段,枯季余水位受径潮相互作用因子控制,洪季受径流因子控制;枯季下游段余水位受潮流控制,而洪季余水位主要受径潮相互作用因子控制。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.
-
Key words:
- Modaomen Estuary /
- residual water level /
- tide-river interaction /
- analytical model
-
Buschman F A, Hoitink A J F, Vegt M V D, et al. Subtidal water level variation controlled by river flow and tides[J]. Water Resources Research, 2009, 45(10):5803-5804. Sassi M G, Hoitink A J F. River flow controls on tides and tide-mean water level profiles in a tidal freshwater river[J]. Journal of Geophysical Research Oceans, 2013, 118(9):4139-4151. Cai H, Savenije H H G, Jiang C, et al. Analytical approach for determining the mean water level profile in an estuary with substantial fresh water discharge[J]. Hydrology and Earth System Sciences, 2016, 12(8):8381-8417. Hoitink A J F, Jay D A. Tidal river dynamics:Implications for deltas[J]. Reviews of Geophysics, 2016, 54(1):240-272. 欧素英,杨清书. 珠江三角洲网河区径流潮流相互作用分析[J]. 海洋学报, 2004, 26(1):125-131. Ou Suying, Yang Qingshu. Interaction of fluctuating river flow with a barotropic tide in river network of the Zhujiang Delta[J]. Haiyang Xuebao, 2004, 26(1):125-131. Guo L, Mick V D W, Jay D A, et al. River-tide dynamics:Exploration of nonstationary and nonlinear tidal behavior in the Yangtze River estuary[J]. Journal of Geophysical Research Oceans, 2015, 120(5):3499-3521. Lai Zhigang, Ma Ronghua, Gao Guangyin, et al. Impact of multichannel river network on the plume dynamics in the Pearl River estuary[J]. Journal of Geophysical Research Oceans, 2015, 120(8):5766-5789. Zu Tingting, Gan Jianping. A numerical study of coupled estuary-shelf circulation around the Pearl River Estuary during summer:Responses to variable winds, tides and river discharge[J]. Deep-Sea Research Part Ⅱ:Topical Studies in Oceanography, 2013, 117:53-64. 杨云平, 李义天, 孙昭华, 等. 长江口近口段水流挟沙力与径潮动力关系[J]. 水动力学研究与进展A辑, 2013(3):274-282. Yang Yunping, Li Yitian, Sun Zhaohua, et al. Relation between sediment carrying capacity and runoff/tidal dynamic in Yangtze Estuary[J].Chinese Journal of Hydrodynamics, 2013(3):274-282. 黄李冰,李义天,韩剑桥, 等. 径潮动力对长江河口滞流点的影响[J].水科学进展, 2015, 26(4):572-578. Huang Libing, Li Yitian, Han Jianqiao, et al. Influence of change in river discharge and tides on stagnation points in the Yangtze River estuary[J]. Advances in Water Science, 2015, 26(4):572-578. 路川藤, 罗小峰, 陈志昌. 长江潮流界对径流、潮差变化的响应研究[J]. 武汉大学学报:工学版, 2016, 49(2):201-205. Lu Chuanteng, Luo Xiaofeng, Chen Zhichang. Study of current limit causing by runoff and tidal range in Yangtze River[J]. Engineering Journal of Wuhan University, 2016, 49(2):201-205. Zhang Wei, Lyu Shujie, Zhu Yuliang, et al. A coupled model of the 1D river network and 3D estuary based on hydrodynamics and suspended sediment simulation[J]. Journal of Applied Mathematics,2014(2):1-13. Zhang Wei, Jia Qiong, Chen Xiaowen. Numerical simulation of flow and suspended sediment transport in the distributary channel networks[J]. Journal of Applied Mathematics, 2014:948731. Bezerra M O M, Pontes R K D S, Gallo M N, et al. Forcing and mixing processes in the Amazon estuary:A study case[J]. IL Nuovo Cimento C, 2008, 31(5):743-756. Lamb M P, Nittrouer J A, Mohrig D, et al. Backwater and river plume controls on scour upstream of river mouths:Implications for fluvio-deltaic morphodynamics[J]. Journal of Geophysical Research Atmospheres, 2012, 117(F1):1002. 蒋陈娟,杨清书,戴志军,等. 近几十年来珠江三角洲网河水位时空变化及原因初探[J]. 海洋学报, 2012, 34(1):46-56. Jiang Chenjuan, Yang Qingshu, Dai Zhijun, et al. Spatial and temporal characteristics of water level change and its causes in the Zhujiang Delta in recent decades[J]. Haiyang Xuebao, 2012, 34(1):46-56. Jay D A, Leffler K, Diefenderfer H L, et al. Tidal-fluvial and estuarine processes in the lower Columbia River:I. along-channel water level variations, Pacific Ocean to Bonneville Dam[J]. Estuaries and Coasts, 2015, 38(2):415-433. Zhang M, Townend I, Zhou Y, et al. Seasonal variation of river and tide energy in the Yangtze estuary, China[J]. Earth Surface Processes and Landforms, 2016, 41(1):98-116. Cai H, Savenije H H G, Toffolon M. Linking the river to the estuary:influence of river discharge on tidal damping[J]. Hydrology and Earth System Sciences, 2014, 10(7):9191-9238. Cai H, Savenije H H G, Jiang C. Analytical approach for predicting fresh water discharge in an estuary based on tidal water level observations[J]. Hydrology and Earth System Sciences, 2014, 11(6):7053-7087. Dronkers J J. Tidal computations in River and Coastal Waters[M]. New York:Elsevier, 1964:1-518. Savenije H H G. Salinity and tides in Alluvial Estuaries (2nd completely revised edition)[EB/OL]. 2017-08-20. www.salinityandtides.com.
点击查看大图
计量
- 文章访问数: 641
- HTML全文浏览量: 22
- PDF下载量: 338
- 被引次数: 0