本文選題：支流河口　切入點(diǎn)：庫灣　出處：《水利水電科技進(jìn)展》2017年03期 　論文類型：期刊論文

【摘要】：通過對三峽庫區(qū)中部典型支流梅溪河庫灣水動(dòng)力參數(shù)及水體溫度、濁度數(shù)據(jù)進(jìn)行分析,研究水庫運(yùn)行各時(shí)期梅溪河河口干支流界面水流特性,探討其影響因素以及水交換對庫灣的影響。結(jié)果表明:梅溪河河口雙向水流特征明顯,在溫差異重流、干流慣性作用以及庫區(qū)水位變動(dòng)等因素影響下,干支流界面水流強(qiáng)度、進(jìn)出水體間界面結(jié)構(gòu)及形態(tài)在不同運(yùn)行期有顯著差異;由于雙向水流結(jié)構(gòu)的存在,盡管梅溪河河口干支流界面凈流量較小(多小于100 m~3/s),但是干支流水體的交換量相對顯著,介于314.17~535.26 m~3/s之間,可達(dá)凈流量的4~40倍;在凈流量最小的低水位運(yùn)行期,干流倒灌水體基本能到達(dá)支流庫灣常年回水區(qū)的末端。
[Abstract]:Based on the analysis of hydrodynamic parameters, water temperature and turbidity data of the typical tributaries in the middle part of the three Gorges Reservoir area, the characteristics of the water flow at the interface of the main tributaries of the Meixi River estuary in each period of operation of the reservoir are studied. The effect of water exchange on Kuwan is discussed. The results show that the characteristics of bidirectional flow in Meixi River estuary are obvious. Under the influence of temperature difference density current, inertial effect of main stream and water level change in reservoir area, the interfacial flow intensity of main tributaries is obvious. The interfacial structure and morphology of the inlet and outlet water bodies have significant differences in different operation periods. Because of the existence of bidirectional flow structure, although the net discharge of the interface of the main tributaries of the Meixi River estuary is smaller (less than 100 mm3 / s ~ (-1)), the exchange capacity of the tributaries is relatively significant. In the range of 314.17 ~ 535.26 m / s, the net flow can reach 4 ~ 40 times of the net flow, and in the period of low water level with the smallest net flow, the backflow of the main stream can basically reach the end of the annual backwater area of the tributary Kuwan.
【作者單位】： 華東師范大學(xué)河口海岸國家重點(diǎn)實(shí)驗(yàn)室;上海大學(xué)環(huán)境與化學(xué)工程學(xué)院;
【基金】：國家自然科學(xué)基金(41271519) 國家水體污染控制與治理科技重大專項(xiàng)(2012ZX07104-001)
【分類號(hào)】：TV133
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本文編號(hào)：1571838