三峡水库蓄水以来重点淤积水道黄花城河床演变及航道变化
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摘要
针对三峡水库蓄水以来常年回水区重点淤积水道黄花城出现泥沙累积性淤积的问题,根据三峡水库蓄水以来原型观测资料,分析黄花城水道蓄水以来水位变化、泥沙冲淤特性、典型断面冲淤变化和等深线变化,对该河道的航道条件变化和演变趋势进行预测。结果表明:黄花城水道存在细沙累积性淤积,主要淤积部位较为固定,2012年以前淤积速度、厚度和范围均较大,2012年以后随着上游来沙量减少的趋势渐缓,黄花城水道泥沙淤积速度逐渐减小。
Aiming at the problem of sediment accumulation in Huanghuacheng reach, which is a key sedimentary channel in the backwater area since the impoundment of the Three Gorges Reservoir,and based on the prototype observation data since the impoundment of the Three Gorges Reservoir,we analyze the water level change,sediment erosion and deposition characteristics,typical section erosion and siltation changes and isobath changes of the Huanghuacheng waterway,and predict the channel conditions and evolution trends of the channel. The results show that there is a cumulative siltation of fine sand in the Huanghuacheng waterway,and the main siltation site is relatively fixed; before 2012, the deposition rate, thickness and range were relatively large; after 2012, with the slowing down of the trend of sediment reduction from the upstream,the sedimentation rate of the Huanghuacheng waterway decreases.
Aiming at the problem of sediment accumulation in Huanghuacheng reach, which is a key sedimentary channel in the backwater area since the impoundment of the Three Gorges Reservoir,and based on the prototype observation data since the impoundment of the Three Gorges Reservoir,we analyze the water level change,sediment erosion and deposition characteristics,typical section erosion and siltation changes and isobath changes of the Huanghuacheng waterway,and predict the channel conditions and evolution trends of the channel. The results show that there is a cumulative siltation of fine sand in the Huanghuacheng waterway,and the main siltation site is relatively fixed; before 2012, the deposition rate, thickness and range were relatively large; after 2012, with the slowing down of the trend of sediment reduction from the upstream,the sedimentation rate of the Huanghuacheng waterway decreases.
引文
[1]长江水利委员会水文局.2017年度三峡水库进出库水沙特性、水库淤积及坝下游河道冲刷分析[R].武汉:长江水利委员会水文局,2018.
[2]蔡其华.三峡工程防洪与调度[J].中国工程科学,2011,13(7):15-19+37.
[3]朱文浩,李云中,闫金波.三峡水库蓄水前后皇华城河段水流条件变化及泥沙冲淤分析[J].科学技术与工程,2015,15(11):95-99.
[4]王涛,刘勇,胡小庆,等.三峡蓄水后皇华城河段航道演变规律研究[J].水运工程,2011(5):103-106.
[5]长江航道规划设计研究院,长江重庆航运工程勘察设计院.长江三峡工程航道泥沙原型观测2017-2018年度分析报告[R].重庆:长江重庆航运工程勘察设计院,2018.
[2]蔡其华.三峡工程防洪与调度[J].中国工程科学,2011,13(7):15-19+37.
[3]朱文浩,李云中,闫金波.三峡水库蓄水前后皇华城河段水流条件变化及泥沙冲淤分析[J].科学技术与工程,2015,15(11):95-99.
[4]王涛,刘勇,胡小庆,等.三峡蓄水后皇华城河段航道演变规律研究[J].水运工程,2011(5):103-106.
[5]长江航道规划设计研究院,长江重庆航运工程勘察设计院.长江三峡工程航道泥沙原型观测2017-2018年度分析报告[R].重庆:长江重庆航运工程勘察设计院,2018.