Journal of East China Normal University(Natural Science) ›› 2022, Vol. 2022 ›› Issue (3): 109-124.doi: 10.3969/j.issn.1000-5641.2022.03.012
• Estuary and Coastal Research • Previous Articles
Received:
2021-06-16
Accepted:
2021-09-29
Online:
2022-05-25
Published:
2022-05-19
Contact:
Jianrong ZHU
E-mail:jrzhu@sklec.ecnu.edu.cn
CLC Number:
Zhipeng LI, Jianrong ZHU. Numerical simulation of the North Branch regime change impact on saltwater intrusion in the Yangtze River Estuary from 2007 to 2016[J]. Journal of East China Normal University(Natural Science), 2022, 2022(3): 109-124.
Table 3
Net transverse section water flux and net water diversion ratio at sec1 of the upper reach of the North Branch and sec2 of the upper reach of the South Branch during spring tide, neap tide, and full tide"
河势特征 | 大潮期间净水通量/( m3·s–1) | 小潮期间净水通量/( m3·s–1) | 全潮期间净水通量/( m3·s–1) | |||||
北支 | 南支 | 北支 | 南支 | 北支 | 南支 | |||
有沙体 | –371.09 | 12004.70 | 229.63 | 13372.77 | –144.95 | 12331.54 | ||
无沙体 | –322.71 | 11959.57 | 232.39 | 13356.45 | –116.04 | 12302.93 | ||
河势特征 | 大潮期间分流比/% | 小潮期间分流比/% | 全潮期间分流比/% | |||||
北支 | 南支 | 北支 | 南支 | 北支 | 南支 | |||
有沙体 | –3.2 | 103.2 | 1.7 | 98.3 | –1.2 | 101.2 | ||
无沙体 | –2.8 | 102.8 | 1.7 | 98.3 | –1.0 | 101.0 |
Table 4
Net transverse section water fluxes at sec1 of the upper reach of the North Branch during spring tide, neap tide, and full tide with different water depths for the new sand body"
调整水深/m | 净水通量/(m3·s–1) | ||
大潮 | 小潮 | 全潮 | |
–0.6 | –419.26 | 227.34 | –129.82 |
–0.7 | –420.82 | 227.27 | –130.73 |
–0.8 | –422.53 | 227.13 | –131.18 |
–0.9 | –422.82 | 227.23 | –131.09 |
–1.0 | –423.05 | 227.07 | –130.90 |
–1.1 | –422.81 | 227.05 | –130.41 |
Table 5
Tidal prisms at sec3, sec4, sec5 at the lower reach of the North Branch during flood and ebb current of spring tide and their respective changes"
河势特征 | 涨潮量/( × 108 m3) | 落潮量/( × 108 m3) | |||||
三和港 | 启东港 | 连兴港 | 三和港 | 启东港 | 连兴港 | ||
淤积前 | 2.73 | 4.46 | 13.20 | 2.47 | 4.18 | 13.08 | |
淤积后 | 2.53 | 4.02 | 11.20 | 2.23 | 3.71 | 10.94 | |
变化量 | –7.3% | –9.9% | –15.2% | –9.7% | –11.2% | –16.4% |
Table 6
Tidal prisms at sec3, sec4, sec5 at the lower reach of the North Branch during flood and ebb current of neap tide and their respective changes"
河势特征 | 涨潮量/( × 108 m3) | 落潮量/( × 108 m3) | |||||
三和港 | 启东港 | 连兴港 | 三和港 | 启东港 | 连兴港 | ||
淤积前 | 0.84 | 1.27 | 3.49 | 0.97 | 1.47 | 3.94 | |
淤积后 | 0.78 | 1.14 | 2.75 | 0.91 | 1.35 | 3.19 | |
变化量 | –7.1% | –10.2% | –21.2% | –6.2% | –8.2% | –19.0% |
Table 7
High and low tide level and tidal range along the North Branch during spring tide and their respective changes"
区域 | 高潮位/m | 低潮位/m | 潮差/m | ||||||||
淤积前 | 淤积后 | 差值 | 淤积前 | 淤积后 | 差值 | 淤积前 | 淤积后 | 差值 | |||
青龙港 | 2.74 | 2.73 | –0.01 | –1.35 | –1.29 | 0.06 | 4.09 | 4.02 | –0.07 | ||
大新港 | 2.99 | 2.91 | –0.08 | –1.28 | –1.20 | 0.08 | 4.27 | 4.11 | –0.16 | ||
三和港 | 2.99 | 2.92 | –0.07 | –1.28 | –1.21 | 0.07 | 4.27 | 4.13 | –0.14 | ||
启东港 | 2.85 | 2.69 | –0.16 | –1.89 | –1.68 | 0.21 | 4.74 | 4.37 | –0.37 | ||
三条港 | 2.86 | 2.69 | –0.17 | –1.88 | –1.67 | 0.21 | 4.74 | 4.36 | –0.38 | ||
连兴港 | 2.57 | 2.49 | –0.08 | –1.20 | –1.99 | 0.01 | 4.57 | 4.48 | –0.09 |
Table 8
High and low tide level and tidal range along the North Branch during neap tide and their respective changes"
区域 | 高潮位/m | 低潮位/m | 潮差/m | ||||||||
淤积前 | 淤积后 | 差值 | 淤积前 | 淤积后 | 差值 | 淤积前 | 淤积后 | 差值 | |||
青龙港 | 0.76 | 0.78 | 0.02 | –0.50 | –0.51 | –0.01 | 1.26 | 1.29 | 0.03 | ||
大新港 | 0.76 | 0.74 | –0.02 | –0.46 | –0.47 | –0.01 | 1.22 | 1.21 | –0.01 | ||
三和港 | 0.76 | 0.75 | –0.01 | –0.46 | –0.47 | –0.01 | 1.22 | 1.22 | 0.00 | ||
启东港 | 0.70 | 0.65 | –0.05 | –0.49 | –0.47 | 0.02 | 1.19 | 1.12 | –0.07 | ||
三条港 | 0.70 | 0.65 | –0.05 | –0.49 | –0.47 | 0.02 | 1.19 | 1.12 | –0.07 | ||
连兴港 | 0.61 | 0.59 | –0.02 | –0.47 | –0.46 | 0.01 | 1.08 | 1.05 | –0.03 |
Table 9
Tidally-averaged salinity in different tide patterns at the water intakes of the Dongfengxisha, Chenhang and Qingcaosha reservoirs under different river regimes in the North Branch"
区域 | 年份 | 平均盐度(psu) | |||
小潮 | 小潮后中潮 | 大潮 | 大潮后中潮 | ||
东风西沙水库 | 2007 | 0.50 | 0.22 | 0.91 | 0.95 |
2016 | 0.39 | 0.07 | 0.50 | 0.74 | |
2016 (无沙体) | 0.32 | 0.10 | 0.36 | 0.59 | |
2016 (淤积前) | 0.40 | 0.10 | 0.61 | 0.76 | |
陈行水库 | 2007 | 0.24 | 0.05 | 0.58 | 0.52 |
2016 | 0.13 | 0.00 | 0.24 | 0.34 | |
2016 (无沙体) | 0.09 | 0.00 | 0.12 | 0.23 | |
2016 (淤积前) | 0.15 | 0.01 | 0.37 | 0.40 | |
青草沙水库 | 2007 | 0.26 | 0.22 | 0.61 | 0.46 |
2016 | 0.16 | 0.09 | 0.34 | 0.30 | |
2016 (无沙体) | 0.13 | 0.06 | 0.23 | 0.21 | |
2016 (淤积前) | 0.18 | 0.11 | 0.43 | 0.35 |
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