人民长江
人民長江
인민장강
Yangtze River
2015年
18期
34-38
,共5页
三口洪道%河道演变%分流能力变化%荆江
三口洪道%河道縯變%分流能力變化%荊江
삼구홍도%하도연변%분류능력변화%형강
three out -channels of Jingjiang River%river channel evolution%diversion capacity variation%impoundment of Three Gorges Reservoir
三峡水库蓄水前,荆江三口洪道逐渐淤积萎缩,分流比沿时程减小;三峡水库蓄水运行后,三口洪道发生了普遍冲刷,导致分流能力发生变化. 为进一步了解其演变趋势,以便实施合理的综合整治,利用水沙数据、河道地形资料及已有的研究成果,探讨了影响三口分流能力的主要因素. 分析结果表明,荆江三口分流总体呈现逐渐减小趋势,在三峡水库蓄水初期高水分流能力有所增强.
三峽水庫蓄水前,荊江三口洪道逐漸淤積萎縮,分流比沿時程減小;三峽水庫蓄水運行後,三口洪道髮生瞭普遍遲刷,導緻分流能力髮生變化. 為進一步瞭解其縯變趨勢,以便實施閤理的綜閤整治,利用水沙數據、河道地形資料及已有的研究成果,探討瞭影響三口分流能力的主要因素. 分析結果錶明,荊江三口分流總體呈現逐漸減小趨勢,在三峽水庫蓄水初期高水分流能力有所增彊.
삼협수고축수전,형강삼구홍도축점어적위축,분류비연시정감소;삼협수고축수운행후,삼구홍도발생료보편충쇄,도치분류능력발생변화. 위진일보료해기연변추세,이편실시합리적종합정치,이용수사수거、하도지형자료급이유적연구성과,탐토료영향삼구분류능력적주요인소. 분석결과표명,형강삼구분류총체정현축점감소추세,재삼협수고축수초기고수분류능력유소증강.
Before the impoundment of Three Gorges Reservoir, the three diversion channels from Changjiang River to Dongting Lake shrank gradually. After the operation of Three Gorges Reservoir, three channels are scoured and the diversion capacity changed. To further understand the evolution trend of the three channels and take reasonable and comprehensive measures, the water level, discharge and variation tendency of the diversion capacity of the three channels are analyzed by using the flow and sediment data, topographic data and the previous research results. The analysis results show that the diversion capacity of the three channels decreased in general, however in the initial impoundment period of Three Gorges Reservoir, the diversion capacity increased in flood season.
