淡澳河口—大亚湾三维潮流及海水入侵模拟

谢培; 张亚辉; 乔飞

doi:10.12153/j.issn.1674-991X.20210616

淡澳河口—大亚湾三维潮流及海水入侵模拟

doi: 10.12153/j.issn.1674-991X.20210616

谢培^1,,
张亚辉²,
乔飞^1, ,

1.
环境基准与风险评估国家重点实验室，中国环境科学研究院
2.
中国环境科学研究院环境分析技术测试中心

基金项目: 国家重点研发计划项目(2017YFC0404702)；国家水体污染控制与治理科技重大专项(2017ZX07107-001-002)

详细信息

作者简介:
谢培(1992—)，女，硕士，主要从事水环境模拟、环境系统分析及风险评估研究，xiepei198@163.com

通讯作者:
乔飞(1977—)，男，正高级工程师，博士，主要从事流域水资源、水环境模拟研究，qiaofei@craes.org.cn

中图分类号: X522
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出版历程
- 收稿日期: 2021-10-27

3D tidal flow and seawater intrusion simulation in Dan'ao Estuary - Daya Bay

XIE Pei^1
,,
ZHANG Yahui²,
QIAO Fei^{1
, ,}

1.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences
2.
Environmental Analysis Technology Test Center, Chinese Research Academy of Environmental Sciences

摘要

摘要:
淡澳河是大亚湾入海河流中流量最大且水质最差的河流，探究淡澳河口流域水动力水质变化对沿海环境风险管控和海岸带整治修复具有重要意义。基于环境流体动力学（EFDC）模型建立淡澳河感潮河段及整个河口区水动力水质模型，重点研究径潮流作用下淡澳河下游及河口区水动力过程，定量估算不同水期下盐水入侵及河流水质的响应关系。结果表明：1）大亚湾潮流以不规则半日混合潮型为主，每月约8~10 d为日潮，20~22 d为半日潮，日潮和半日潮下，表层水体不能到达虎爪断面（国控点位），底层水体可入侵到虎爪断面上游约700~1 100 m处；2）不同水期下的盐水入侵表明，淡澳河水体枯水期含盐量最高，达16‰，研究基于2019年水文资料初步划分了河海水团交界线，可为河口海岸带淡水和海水分类整治提供依据；3）由咸淡水交互与水质响应关系可知，丰水期污染物浓度相较于平水期增加明显，约为10%，上游流量变化直接影响水质，小潮期间尤为明显，建议进行工程优化调度减小小潮期间的下泄流量。
- 水动力模拟 /
- 潮流 /
- 盐度 /
- EFDC模型
Abstract:
The Dan'ao River is the one with the largest flow and the worst water quality in Daya Bay's rivers flowing into the Southern Ocean. Exploring the hydrodynamic water quality changes of the Dan'ao River is of great significance for coastal environmental risk control and coastal zone remediation. The hydrodynamic water quality model of the tidal reach and the whole estuary area of the Dan'ao River were established based on the EFDC model. The hydrodynamic process in the downstream and estuarine area under the action of runoff and current was mainly researched, and the response relationship between saltwater intrusion and water quality in different water periods was estimated quantitatively. The results showed that the tidal characteristics of Daya Bay were mainly irregular semi-diurnal mixed tide, which was diurnal tide about 8-10 days a month, and semi-diurnal tide about 20-22 days a month. Under the diurnal tide and semi-diurnal tide, the bottom water could invade the upstream of Huzhao section (the national section) about 700-1 100 m, but the surface water could not reach the section. The salt water intrusion in different water periods showed that the salt content was the highest in the low water period, up to 16‰. Based on the hydrologic data of 2019, the boundary of river and sea water mass was preliminarily divided, which could provide the basis for the classification and regulation of fresh water and sea water in the estuary and coastal zone. According to the interaction between salt water and fresh water, the concentration of pollutants in the high water period increased significantly, about 10% higher compared with that in the average water period, and the change of upstream flow directly affected the water quality, especially during the neap tide. It was suggested to optimize the project scheduling to reduce the discharge during the neap tide.
- hydrodynamic simulation /
- tidal flow /
- salinity /
- EFDC model

HTML全文

图 1 网格边界条件分布

Figure 1. Grid division and boundary conditions of research region

下载: 全尺寸图片幻灯片

图 2 水体垂向盐度分配

Figure 2. Distribution of vertical salinity of water body

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图 3 大亚湾潮汐变化趋势

Figure 3. Trend of tide change in Daya Bay

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图 4 日潮和半日潮涨急流域潮流场分布

Figure 4. Distribution of tidal current at diurnal and semidiurnal tides during typical moment

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图 5 日潮和半日潮流域表、底层潮流场分布

Figure 5. Distribution of tidal current at diurnal and semidiurnal tides on the surface and bottom

下载: 全尺寸图片幻灯片

图 6 淡澳河上游姚田桥至虎爪断面底层水体盐度分布

注：虎爪断面距离姚田桥约为2 100 m。

Figure 6. Salinity distribution of bottom water from Yaotianqiao to Huzhao section in the upstream of Dan'ao River

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图 7 中游河段不同水期水体盐度分布

Figure 7. Distribution of water salinity in the midstream in different water periods

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图 8 上游来水变化对虎爪断面水质影响分析

Figure 8. Analysis of the influence of upstream water on the water quality of Huzhao section

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表 1 水动力水质参数模拟误差统计

Table 1. Error analysis of simulated hydrodynamic water quality parameters

指标	枯水期		丰水期		平水期
指标	R²	相对误差%	R²	相对误差%	R²	相对误差%
水位	0.93	−1	0.90	3	0.89	5
盐度	0.87	4	0.89	−2	0.86	−7
氨氮	0.81	−10	0.84	8	0.80	−11
COD	0.80	−18	0.82	−8	0.76	13
TP	0.81	14	0.80	16	0.77	−19

下载: 导出CSV

参考文献(22)

[1]	周国华, 孙彬彬, 刘占元, 等.河流活性物质入海通量: 概念与方法[J]. 地质通报,2008,27(2):182-187. doi: 10.3969/j.issn.1671-2552.2008.02.003 ZHOU G H, SUN B B, LIU Z Y, et al. Flux of river active material flowing into the sea: concept and methodology[J]. Geological Bulletin of China,2008,27(2):182-187. doi: 10.3969/j.issn.1671-2552.2008.02.003
[2]	WU M L, WANG Y S, WANG Y T, et al. Scenarios of nutrient alterations and responses of phytoplankton in a changing Daya Bay, South China Sea[J]. Journal of Marine Systems,2017,165:1-12. doi: 10.1016/j.jmarsys.2016.09.004
[3]	任秀文, 姜国强, 刘爱萍, 等. 大亚湾主要入海河流污染物通量估算研究[C]//中国环境科学学会学术年会论文集, 2013: 1055-1064.
[4]	黄牧涛, 田勇.湖泊三维流场数值模拟及其在东湖的应用[J]. 水动力学研究与进展A辑,2014,29(1):114-124. HUANG M T, TIAN Y. Three-dimensional lake hydrodynamic numerical modeling and its application to Lake Donghu[J]. Chinese Journal of Hydrodynamics,2014,29(1):114-124.
[5]	陈青毅, 吴卫, 刘桦.河口水库库内三维流动数值模拟[J]. 水动力学研究与进展A辑,2011,26(2):140-149. doi: 10.3969/j.issn.1000-4874.2011.02.002 CHEN Q Y, WU W, LIU H. Numerical simulation of three dimensional flows in estuarine reservoir[J]. Chinese Journal of Hydrodynamics,2011,26(2):140-149. doi: 10.3969/j.issn.1000-4874.2011.02.002
[6]	姜恒志, 崔雷, 石峰, 等.风场、地形和吞吐流对太湖流场影响的研究[J]. 水力发电学报,2013,32(6):165-171. doi: 10.12153/j.issn.1674-991X.20190197 JIANG H Z, CUI L, SHI F, et al. Study on influences of wind field, topography and inflow/outflow on flow in lake Tai[J]. Journal of Hydroelectric Engineering,2013,32(6):165-171. doi: 10.12153/j.issn.1674-991X.20190197
[7]	齐珺, 杨志峰, 熊明, 等.长江水系武汉段水动力过程三维数值模拟[J]. 水动力学研究与进展A辑,2008,23(2):212-219. QI J, YANG Z F, XIONG M, et al. Three-dimensional modeling of hydrodynamic processes in the Wuhan Catchments of the Chang Jiang River[J]. Journal of Hydrodynamics,2008,23(2):212-219.
[8]	谢培, 孙宁, 方源, 等.三峡水库水动力分区及总磷标准研究[J]. 中国环境科学,2022,42(10):4752-4757. XIE P, SUN N, FANG Y, et al. Study on hydrodynamic partition and total phosphorus standard in the Three Gorges Reservoir[J]. China Environmental Science,2022,42(10):4752-4757.
[9]	王军星, 梁浩亮, 黄舜琴.惠州市大亚湾淡澳河入海口的海水入侵和土壤盐渍化[J]. 海洋开发与管理,2018,35(6):46-48. doi: 10.3969/j.issn.1005-9857.2018.06.011 WANG J X, LIANG H L, HUANG S Q. Seawater intrusion and soil salinization near shoreline of Danao River in Daya Bay, Huizhou[J]. Ocean Development and Management,2018,35(6):46-48. doi: 10.3969/j.issn.1005-9857.2018.06.011
[10]	ZHANG Y, LI H L, GUO H M, et al. Improvement of evaluation of water age and submarine groundwater discharge: a case study in Daya Bay, China[J]. Journal of Hydrology,2020,586:124775.
[11]	XIAO K, LI H L, SHANANAN M, et al. Coastal water quality assessment and groundwater transport in a subtropical mangrove swamp in Daya Bay, China[J]. Science of the Total Environment,2019,646:1419-1432.
[12]	张冬冬, 戴明龙, 李妍清, 等.1956—2020年荆江三口径流变化特征及水库补水效果[J]. 湖泊科学,2022,34(3):945-957. ZHANG D D, DAI M L, LI Y Q, et al. Characteristics of runoff in the three outlets along Jingjiang River and the influence of water supplement by the reservoirs during 1956-2020[J]. Journal of Lake Sciences,2022,34(3):945-957.
[13]	施媛媛, 李一平, 程月, 等.大型浅水湖泊磷模型参数不确定性及敏感性分析[J]. 环境科学,2019,40(10):4478-4486. SHI Y Y, LI Y P, CHENG Y, et al. Uncertainty and sensitivity analysis of phosphorus model parameters in large shallow lakes[J]. Environmental Science,2019,40(10):4478-4486.
[14]	刘晓, 刘海涵, 王丽婧, 等.三峡库区EFDC模型集成与应用[J]. 环境科学研究,2018,31(2):283-294. LIU X, LIU H H, WANG L J, et al. The EFDC model integration and application in the Three Gorges Reservoir[J]. Research of Environmental Sciences,2018,31(2):283-294.
[15]	LI J, LI D X, WANG X K. Three-dimensional unstructured-mesh eutrophication model and its application to the Xiangxi River, China[J]. Journal of Environmental Sciences,2012,24(9):1569-1578.
[16]	鲍道阳, 朱建荣.近60年来长江河口河势变化及其对水动力和盐水入侵的影响: Ⅱ. 水动力[J]. 海洋学报,2017(2):1-15. BAO D Y, ZHU J R. The effects of river regime changes in the Changjiang Estuary on hydrodynamics and salinity intrusion in the past 60 years: Ⅱ. Hydrodynamics[J]. Acta Oceanologica Sinica,2017(2):1-15.
[17]	乔飞, 郑丙辉, 雷坤, 等.长江下游及河口区水动力特征[J]. 环境科学研究,2017,30(3):389-397. QIAO F, ZHENG B H, LEI K, et al. Hydrodynamics in the lower reaches of the Yangtze River and its estuary[J]. Research of Environmental Sciences,2017,30(3):389-397.
[18]	韩龙喜, 金忠青.平原河网的水量计算和参数率定-改进的湄公河模型[J]. 水动力学研究与进展(A辑),1991,6(增刊 1):39-45. HAN L X, JIN Z Q. The flooding plain network model-the improved Mekong River model[J]. Journal of Hydrodynamics,1991,6(Suppl 1):39-45.
[19]	武文, 严聿晗, 宋德海.大亚湾的潮汐动力学研究: Ⅰ. 潮波系统的观测分析与数值模拟[J]. 热带海洋学报,2017,36(3):34-45. WU W, YAN Y H, SONG D H. Study on the tidal dynamics in Daya Bay, China: part Ⅰ. Observation and numerical simulation of tidal dynamic system[J]. Journal of Tropical Oceanography,2017,36(3):34-45.
[20]	吴仁豪, 蔡树群, 王盛安, 等.大亚湾海域潮流和余流的三维数值模拟[J]. 热带海洋学报,2007,26(3):18-23. doi: 10.3969/j.issn.1009-5470.2007.03.003 WU R H, CAI S Q, WANG S A, et al. Three-dimensional numerical simulation of tidal current and residual current at Daya Bay[J]. Journal of Tropical Oceanography,2007,26(3):18-23. doi: 10.3969/j.issn.1009-5470.2007.03.003
[21]	黄小平, 黄良民.河口最大浑浊带浮游植物生态动力过程研究进展[J]. 生态学报,2002,22(9):1527-1533. doi: 10.3321/j.issn:1000-0933.2002.09.023 HUANG X P, HUANG L M. Progress in researches on dynamical processes of phytoplankton ecology in maximum turbidity zone of estuary[J]. Acta Ecologica Sinica,2002,22(9):1527-1533. doi: 10.3321/j.issn:1000-0933.2002.09.023
[22]	KE Z X, TAN Y H, HUANG L M, et al. Spatial distributions of δ¹³C, δ¹⁵N and C/N ratios in suspended particulate organic matter of a bay under serious anthropogenic influences: Daya Bay, China[J]. Marine Pollution Bulletin,2017,114(1):183-191. □