【摘要】：因徑流潮汐相互作用,三角洲各水道的能通量包含徑流引起的凈通量及潮汐引起的潮能通量。本文利用珠江三角洲多斷面實(shí)測水位及流量的同步測量數(shù)據(jù),建立基于徑潮耦合的調(diào)和分析模型,剝離徑流信號(hào),計(jì)算出各站的總潮能及M_2、K_1及高頻淺水分潮的潮能,對(duì)珠江三角洲潮能的沿程傳播及衰減進(jìn)行研究。結(jié)果表明,通過虎門進(jìn)入珠江三角洲的潮波能量約占51.2%,而通過崖門、蕉門、磨刀門傳入三角洲的潮能約占37%;同時(shí),因地形摩擦、徑流耗能效應(yīng),三角洲各水道的總能量損耗為148.33MW。潮波能量按匯聚型和分散型兩大類型沿三角洲不同位置傳播并沿程衰減�；㈤T獅子洋及珠江正干、崖門至潭江石咀兩大水道體系,其潮能沿程分散傳入不同汊道,斷面總潮能的衰減幅度大于單寬潮能通量的衰減,單寬潮動(dòng)能沿程平均衰減速率大于潮勢能,半日分潮的潮能衰減速率大于全日分潮�；㈤T獅子洋因其形態(tài)影響,M2分潮振幅(或勢能)的衰減最小,虎門至泗盛圍段增加,平均每千米約增加0.77%。西四口門潮能匯聚于西海水道天河斷面,總潮能的衰減速率小于磨刀門水道單寬潮能衰減速率。沿橫門、洪奇門、蕉門進(jìn)入的潮波多次交匯、分散,自橫門至小欖、南華,南沙至海尾、榮奇,其單寬潮動(dòng)能及M2、K1分潮動(dòng)能的衰減速率小于潮勢能,高頻分潮勢能沿程增加。
[Abstract]:Due to the interaction of runoff and tide, the energy fluxes of delta waterways include net fluxes caused by runoff and tidal energy fluxes caused by tides. In this paper, a harmonic analysis model based on diameter-tide coupling is established based on synchronous measurement data of multi-section measured water level and discharge in the Pearl River Delta. The total tidal energy and M2s of each station are calculated by stripping off runoff signals. The propagation and attenuation of tidal energy in Pearl River Delta are studied by using K-1 and high frequency shallow water tidal energy. The results show that the tidal wave energy entering the Pearl River Delta through Humen accounts for about 51.2 percent, while the tidal energy through the Yamen, Jiaomen and Modaomen accounts for about 37 percent. At the same time, because of topography friction and energy dissipation effect of runoff, the total energy loss of each channel in the delta is 148.33 MW. Tidal wave energy propagates and attenuates along different positions of delta according to convergent type and dispersed type. The tidal energy of Humen Lion Ocean and Pearl River, Yamen to Tanjiang River Shizui is dispersed into different branches along the course, and the attenuation of total tidal energy in section is greater than that of single wide tide energy flux. The average attenuation rate of the kinetic energy along the course of a single wide tide is greater than that of the potential energy of the tide, and the attenuation rate of the tidal energy of the semidiurnal component is greater than that of the whole day. Due to its morphological influence, the attenuation of M2 tidal amplitude (or potential energy) is the least, and the increase of Humen to Simeng circumference section, with an average increase of 0.77 meters per kilometer. The tide energy of Xisikoumen is converged on the Tianhe section of the Xihai waterway, and the attenuation rate of the total tidal energy is smaller than that of the single wide tidal energy of the Motaiaomen waterway. Along Hengmen, Hongqimen and Jiaomen, the tidal waves entering into the river converge and disperse. The attenuation rate of the tidal energy from Hengmen to Siu Lam, South China, Nansha to Haiwei and Rongqi is smaller than that of tidal potential energy, and the single wide tidal kinetic energy and the kinetic energy of the M2K1 component are smaller than the tidal potential energy. The potential energy of high frequency tidal component increases along the range.
【作者單位】： 中山大學(xué)海洋學(xué)院河口海岸研究所;河口水利技術(shù)國家地方聯(lián)合工程實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(41106015)
【分類號(hào)】：P731.23

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