【摘要】：為了解決感潮河網(wǎng)徑流、潮汐交匯,動(dòng)力復(fù)雜,潰決洪水難以用經(jīng)驗(yàn)公式準(zhǔn)確概化的問題,建立直接以潰口為耦合斷面的河網(wǎng)一維、保護(hù)區(qū)二維側(cè)向耦合模型,將感潮河網(wǎng)與保護(hù)區(qū)一體化,避免環(huán)境因素及經(jīng)驗(yàn)參數(shù)的不確定性帶來的潰口流量估算誤差。典型算例和中順大圍潰決洪水情景模擬表明:洪水自潰口集中噴射出后分散流向圍內(nèi),流態(tài)受圍內(nèi)下墊面影響顯著,潰口水位、流量隨外江潮位漲落而起伏變化,由潰口流量過程線計(jì)算所得潰口水量與根據(jù)淹沒區(qū)各單元的面積和水深計(jì)算的圍內(nèi)總水量一致。模擬成果直接反映下墊面、水頭差、潮位漲落,及潰口流態(tài)對(duì)潰決洪水的綜合影響,反映出本耦合模型計(jì)算潰口流量及對(duì)潰決洪水模擬的合理性、可信性,具有較好的應(yīng)用前景。
[Abstract]:In order to solve the problems of tidal network runoff, tidal intersection, complex dynamics and difficult to accurately generalize burst flood by empirical formula, a one-dimensional and two-dimensional lateral coupling model of river network with break mouth as coupling cross-section is established. The tidal-sensitive river network is integrated with the protected area to avoid the estimation error of gully discharge caused by the uncertainty of environmental factors and empirical parameters. The typical example and simulation of the burst flood scenario of Zhongshun Dawei show that the flow pattern is significantly affected by the underlying surface in the surrounding area, and the water level and the discharge fluctuate with the fluctuation of the tide level of the outer river, after the flood has been ejected centrally from the collapse mouth and then dispersed into the enclosure. The water volume calculated from the process line of the collapse flow is consistent with the total water quantity in the enclosure calculated according to the area and depth of each unit in the submerged area. The simulation results directly reflect the comprehensive effects of the underlying surface, head difference, tidal level fluctuation, and flow pattern of the collapse on the burst flood, and reflect the rationality and credibility of the coupling model for calculating the discharge of the collapse and the simulation of the burst flood, and the feasibility and reliability of the coupling model for the calculation of the burst discharge and the simulation of the burst flood. It has a good application prospect.
【作者單位】： 珠江水利委員會(huì)珠江水利科學(xué)研究院;珠江水利委員會(huì)水利部珠江河口動(dòng)力學(xué)及伴生過程調(diào)控重點(diǎn)實(shí)驗(yàn)室;珠江水利委員會(huì)防汛抗旱辦公室;
【基金】：國(guó)家自然科學(xué)基金青年基金項(xiàng)目(51409286)
【分類號(hào)】：TV122.4

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