人民长江2023，Vol.54Issue(12)：179-187,9.DOI:10.16232/j.cnki.1001-4179.2023.12.024
泄洪强度对深水库区过饱和TDG输移影响研究
Influence of flood discharge intensity on supersaturated total dissolved gas(TDG)transport in deep-water reservoir area
摘要
Abstract
With the construction and operation of cascade reservoirs in the upper reaches of Jinsha River,the problem of total dissolved gas(TDG)supersaturation caused by high dam flood discharge is more prominent,and the transport characteristics of supersaturated TDG in deep-water reservoirs under different flood discharge intensities are still unclear.In this paper,the trans-port law of supersaturated TDG in the Xiluodu-Xiangjiaba section under different flood discharge intensity scenarios was ana-lyzed by combining prototype observation and a vertical two-dimensional mathematical model.The results showed that the dis-charge flow quantity and discharge duration of Xiluodu Reservoir drove the attenuation process of supersaturated TDG transport to the Xiangjiaba Reservoir area.The supersaturated TDG transport rate increased with the increase in discharge quantity and dis-charge time,and the fastest rate could reach 21.25 km/d.The increase in flood discharge from Xiluodu Reservoir led to an in-crease of the total amount of supersaturated TDG accumulated and the decrease of the attenuation rate in the Xiluodu-Xiangjiaba section.Under the design conditions,the attenuation rate of supersaturated TDG decreased with the increase in flood discharge time.After the Xiluodu Reservoir had discharged for about 24 hours,the TDG supersaturation state in the Xiluodu-Xiangjiaba section tended to be stable,and the minimum attenuation rate was only 0.74%/d.关键词
过饱和TDG/泄洪流量/泄洪时间/数值模拟/深水库区/溪洛渡水库/向家坝水库Key words
supersaturation total dissolved gas(TDG)/flood discharge quantity/discharge time/numerical simulation/deep-water reservoir area/Xiluodu Reservoir/Xiangjiabo Reservoir分类
建筑与水利引用本文复制引用
申赵勇,石浩洋,侯春尧,周哲成,王智欣,郭辉..泄洪强度对深水库区过饱和TDG输移影响研究[J].人民长江,2023,54(12):179-187,9.基金项目
国家重点研发计划项目(2022YFC3203904) （2022YFC3203904）
国家自然科学基金项目(52130903) （52130903）
中央级科研院所基本科研业务费(CKSF2023401/SL) （CKSF2023401/SL）
中国长江三峡集团有限公司科研项目(0704179) （0704179）
