Verification of Discharge Capacity of Flood Discharge Structures of Three Gorges Project

doi:10.11988/ckyyb.20231025

Abstract

Abstract:

Since the completion of the Three Gorges Dam in 2003, its flood discharge and energy dissipation structures have withstood many flood tests. To further evaluate and summarize the design and actual performance of these structures, the discharge capacity of the Three Gorges Project was comprehensively assessed during the first regular dam safety inspection. The flow capacity of the power station units was verified using data from the Huanglingmiao Hydrological Station. The measured flow data from the power station indicate that the turbine output curve accurately reflects the actual flow rates of the left bank, right bank, and underground power stations. The actual discharge capacities of deep holes and surface holes were also evaluated and compared with their respective design values and model test results. The comparison reveals that the measured discharge capacity of deep holes matches the design value, while the measured discharge capacity of surface holes is slightly higher than the design value. However, the combined discharge capacity of deep holes and surface holes is basically consistent with the design value.

Key words: Three Gorges Project, deep outlet, surface outlet, discharge capacity

CLC Number:

TV61水利枢纽工程

Cite this article

HU Han, GENG Jun, TONG Guang-qin, DING Yu. Verification of Discharge Capacity of Flood Discharge Structures of Three Gorges Project[J]. Journal of Changjiang River Scientific Research Institute, 2025, 42(1): 115-119.

share this article

0
/ / Recommend

Add to citation manager EndNote|Ris|BibTeX

URL: http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20231025

http://ckyyb.crsri.cn/EN/Y2025/V42/I1/115

Figures/Tables 12

Table 1 Discharge capacity of deep outlets (model test)

库水位 H/m	流量Q/ (m³·s^-1)	流量系数 μ	库水位 H/m	流量Q/ (m³·s^-1)	流量系数 μ
92.85	1 065		135.38	34 270	0.885
97.54	5 200		139.50	36 420	0.892
100.82	9 010		146.16	38 700	0.887
103.13	11 820		149.36	40 700	0.894
110.79	19 830	0.899	159.21	44 250	0.889
117.79	24 790	0.891	169.23	47 600	0.885
126.54	29 740	0.883	179.63	50 910	0.883
131.35	32 220	0.883

Table 1 Discharge capacity of deep outlets (model test)

库水位 H/m	流量Q/ (m³·s^-1)	流量系数 μ	库水位 H/m	流量Q/ (m³·s^-1)	流量系数 μ
92.85	1 065		135.38	34 270	0.885
97.54	5 200		139.50	36 420	0.892
100.82	9 010		146.16	38 700	0.887
103.13	11 820		149.36	40 700	0.894
110.79	19 830	0.899	159.21	44 250	0.889
117.79	24 790	0.891	169.23	47 600	0.885
126.54	29 740	0.883	179.63	50 910	0.883
131.35	32 220	0.883

Table 2 Discharge capacity of surface outlets (model test)

库水位 H/m	流量Q/ (m³·s^-1)	流量系数 μ	库水位 H/m	流量Q/ (m³·s^-1)	流量系数 μ
161.64	2 270	0.419	180.08	36 010	0.445
167.03	8 700	0.411	182.86	44 050	0.456
175.08	23 950	0.435

Table 2 Discharge capacity of surface outlets (model test)

库水位 H/m	流量Q/ (m³·s^-1)	流量系数 μ	库水位 H/m	流量Q/ (m³·s^-1)	流量系数 μ
161.64	2 270	0.419	180.08	36 010	0.445
167.03	8 700	0.411	182.86	44 050	0.456
175.08	23 950	0.435

Table 3 Combined discharge capacity of deep outlets and surface outlets

库水位H/m	167.15	175.19	180.02	182.88
流量Q/(m³·s^-1)	55 660	73 420	86 900	96 000

Table 3 Combined discharge capacity of deep outlets and surface outlets

库水位H/m	167.15	175.19	180.02	182.88
流量Q/(m³·s^-1)	55 660	73 420	86 900	96 000

Table 4 Comprehensive discharge capacity of discharge facilities (model test)

泄水设施	不同库水位下泄流能力/(m³·s^-1)
泄水设施	135 m	140 m	145 m	150 m	155 m	160 m	165 m	170 m	175 m	180 m	183 m
深孔	34 170	36 520	38 720	40 780	42 720	44 550	46 280	47 920	49 490	50 990	51 580
表孔	—	—	—	—	—	800	6 000	13 460	23 770	35 810	44 050
深孔+表孔	34 170	36 520	38 720	40 780	42 720	45 350	52 280	61 380	73 260	86 800	9 5630
排漂孔	110	730	1 700	2 630	3 390	4 000	4 540	5 020	5 440	5 840	6 030
排沙孔	2 308	2 418	2 516	2 606
	2 370	2 471	2 566	2 660
	2 428	2 525	2 628	2 718

Table 4 Comprehensive discharge capacity of discharge facilities (model test)

泄水设施	不同库水位下泄流能力/(m³·s^-1)
泄水设施	135 m	140 m	145 m	150 m	155 m	160 m	165 m	170 m	175 m	180 m	183 m
深孔	34 170	36 520	38 720	40 780	42 720	44 550	46 280	47 920	49 490	50 990	51 580
表孔	—	—	—	—	—	800	6 000	13 460	23 770	35 810	44 050
深孔+表孔	34 170	36 520	38 720	40 780	42 720	45 350	52 280	61 380	73 260	86 800	9 5630
排漂孔	110	730	1 700	2 630	3 390	4 000	4 540	5 020	5 440	5 840	6 030
排沙孔	2 308	2 418	2 516	2 606
	2 370	2 471	2 566	2 660
	2 428	2 525	2 628	2 718

Fig.1 Comparison of flow discharge in left bank power units between calculation and observation

Fig.2 Comparison of flow discharge in left bank and right bank power units between calculation and observation

Fig.3 Comparison between calculation and observation for flow discharge in left bank and right bank and underground power units

Fig.4 Verification of discharge capacity of deep outlets

Table 5 Verification of discharge capacity of deep outlets

日期	深孔开启数量	库水位/ m	实测深孔流量/ (m³·s^-1)	实测单孔流量/ (m³·s^-1)	模型试验流量/ (m³·s^-1)	流量系数 μ
2013-07-24	2	153.40	3 580	1 790	1 832	0.870
2018-07-18	6	153.84	10 761	1 793	1 839	0.868
2019-08-08	1	146.12	1 666	1 666	1 705	0.870
2020-07-29	7	163.27	13 604	1 943	1 991	0.869

Table 5 Verification of discharge capacity of deep outlets

日期	深孔开启数量	库水位/ m	实测深孔流量/ (m³·s^-1)	实测单孔流量/ (m³·s^-1)	模型试验流量/ (m³·s^-1)	流量系数 μ
2013-07-24	2	153.40	3 580	1 790	1 832	0.870
2018-07-18	6	153.84	10 761	1 793	1 839	0.868
2019-08-08	1	146.12	1 666	1 666	1 705	0.870
2020-07-29	7	163.27	13 604	1 943	1 991	0.869

Table 6 Verification of discharge capacity of surface outlets

日期	表孔开启数量	库水位/ m	实测表孔流量/ (m³·s^-1)	实测单孔流量/ (m³·s^-1)	模型试验流量/ (m³·s^-1)	流量系数 μ
2012-07-30	3	160.42	163	54	55	0.407
2008-11-09	4	172.62	3 381	845	846	0.427

Table 6 Verification of discharge capacity of surface outlets

日期	表孔开启数量	库水位/ m	实测表孔流量/ (m³·s^-1)	实测单孔流量/ (m³·s^-1)	模型试验流量/ (m³·s^-1)	流量系数 μ
2012-07-30	3	160.42	163	54	55	0.407
2008-11-09	4	172.62	3 381	845	846	0.427

Fig.5 Verification of discharge capacity of surface outlets

Table 7 Combined discharge capacity of deep outlets and surface outlets

库水位/m	泄水设施泄流能力/(m³·s^-1)
	深孔			表孔			深孔+表孔
	设计值	模型试验	实测推断	设计值	模型试验	实测推断	设计值	模型试验	实测推断
135	33 510	34 170	33 503	—	—	—	33 510	34 170	33 503
140	35 760	36 520	35 754	—	—	—	35 760	36 520	35 754
145	37 880	38 720	37 872	—	—	—	37 880	38 720	37 872
150	39 880	40 780	39 877	—	—	—	39 880	40 780	39 877
155	41 790	42 720	41 786	—	—	—	41 790	42 720	41 786
160	43 620	44 550	43 612	820	800	820	44 440	45 350	44 432
165	45 370	46 280	45 364	5 850	6 000	5 967	51 220	52 280	51 331
170	47 060	47 920	47 051	13 630	13 460	13 834	60 690	61 380	60 885
175	48 680	49 490	48 679	23 540	23 770	23 822	72 220	73 260	72 501
180	50 260	50 990	50 255	35 260	35 810	35 648	85 520	86 800	85 903
183	51 180	51 580	51 177	43 090	44 050	43 521	94 270	95 630	94 698

Table 7 Combined discharge capacity of deep outlets and surface outlets

库水位/m	泄水设施泄流能力/(m³·s^-1)
	深孔			表孔			深孔+表孔
	设计值	模型试验	实测推断	设计值	模型试验	实测推断	设计值	模型试验	实测推断
135	33 510	34 170	33 503	—	—	—	33 510	34 170	33 503
140	35 760	36 520	35 754	—	—	—	35 760	36 520	35 754
145	37 880	38 720	37 872	—	—	—	37 880	38 720	37 872
150	39 880	40 780	39 877	—	—	—	39 880	40 780	39 877
155	41 790	42 720	41 786	—	—	—	41 790	42 720	41 786
160	43 620	44 550	43 612	820	800	820	44 440	45 350	44 432
165	45 370	46 280	45 364	5 850	6 000	5 967	51 220	52 280	51 331
170	47 060	47 920	47 051	13 630	13 460	13 834	60 690	61 380	60 885
175	48 680	49 490	48 679	23 540	23 770	23 822	72 220	73 260	72 501
180	50 260	50 990	50 255	35 260	35 810	35 648	85 520	86 800	85 903
183	51 180	51 580	51 177	43 090	44 050	43 521	94 270	95 630	94 698

Related Articles 15

[1]	WANG Peng-xiang, JIANG Xiao-xuan, XU Yang, WANG Dong, HUO Jun-jun, ZHOU Tao. Evaluation Indicator System for Ecological Benefit of Hydropower Projects [J]. Journal of Changjiang River Scientific Research Institute, 2024, 41(9): 8-18.
[2]	DUAN Guang-lei, PENG Yan-bo. Characteristics and Influence Factors of Sandbar Evolution in Jingjiang Reach of the Yangtze River under New Water and Sediment Conditions [J]. Journal of Changjiang River Scientific Research Institute, 2024, 41(7): 175-181.
[3]	LIAO Yu-ang, LIU Yu. Channel Evolution and Trend of Chenjiawan-Tuqi Sandbar Braided Reach in the Jingjiang River [J]. Journal of Changjiang River Scientific Research Institute, 2024, 41(7): 196-202.
[4]	HU Xing-e, CAO Rui. Review and Prospect of Comprehensive Benefits of Three Gorges Project in 20 Years of Operation [J]. Journal of Changjiang River Scientific Research Institute, 2024, 41(6): 1-9.
[5]	DUAN Wen-gang, HU Han, HOU Dong-mei. Evaluation of Flood Discharge Safety of Three Gorges Dam in Two Decades of Operation [J]. Journal of Changjiang River Scientific Research Institute, 2024, 41(6): 178-186.
[6]	HU Yuan-cheng, CHEN Long, YANG Huan. Changes in Flood Control Regime for the Tail of Ganjiang River [J]. Journal of Changjiang River Scientific Research Institute, 2024, 41(12): 202-208.
[7]	WANG Dong, XIE Shuai, XU Ji-jun, WANG Yong-qiang. Impact of Three Gorges Project Operation on Safety of Irrigation Water Supply in Poyang Lake Area [J]. Journal of Changjiang River Scientific Research Institute, 2023, 40(8): 30-38.
[8]	CHAI Ze-qing, GUO Xiao-hu, ZHU Yong-hui. Research Progress on the Relationship between Jingjiang River and Dongting Lake after the Operation of Three Gorges Project [J]. Journal of Changjiang River Scientific Research Institute, 2023, 40(4): 17-23,30.
[9]	GONG Ke, LI Xue-hai, WANG Shi-kui, ZHENG Nan, REN Kun-jie. Factors Affecting the Prediction Deviation of Diversion Tunnel's Discharge Capacity [J]. Journal of Changjiang River Scientific Research Institute, 2022, 39(10): 147-150.
[10]	YUAN Liu, JI Qing-feng. Influence of Sidewall Angle on Discharge Capacity of Trapezoidal Key Weir [J]. Journal of Changjiang River Scientific Research Institute, 2022, 39(10): 151-157.
[11]	SUN Zheng-lan. Flood Discharge Capacity of Watercourse Entering the Yangtze River from the Huaihe River [J]. Journal of Changjiang River Scientific Research Institute, 2020, 37(4): 50-55.
[12]	DONG Yao-hua. Review on Flood Control and River Regulation of the Middle and Lower Yangtze River after 2016-type Flood [J]. Journal of Changjiang River Scientific Research Institute, 2020, 37(1): 1-6.
[13]	CHEN Gang, CHENG He-qin. Riverbed Resistance in the Lower Reach of Yangtze River: Distribution Characteristics and Influencing Factors [J]. Journal of Changjiang River Scientific Research Institute, 2019, 36(8): 10-16.
[14]	SHAN Liang, CUI Jian-hua, SU Hai-dong. Simulation and Analysis of Three Gorges Ship Lift Tower Structure in Construction Period [J]. Journal of Changjiang River Scientific Research Institute, 2019, 36(7): 118-124.
[15]	WU Ai-qing. Series Methods of Analyzing Rock Mass Stability Based on Key Block Theory and Their Applications to Three Gorges Project [J]. Journal of Changjiang River Scientific Research Institute, 2019, 36(2): 1-7.

Metrics

Viewed

Full text

Abstract

Comments

Abstract
Figures/Tables
Related Articles
Recommended Articles
Metrics
Comments

TOP