In this paper a three-dimensional tidal current model has been used toexamine variations of local fluid field due to establishment of a dam. By imputing ten tides-K_1,O_1, P_1 , Q_1, M_2, S_2, N_2, K_2 , S_a and S_(sa...In this paper a three-dimensional tidal current model has been used toexamine variations of local fluid field due to establishment of a dam. By imputing ten tides-K_1,O_1, P_1 , Q_1, M_2, S_2, N_2, K_2 , S_a and S_(sa) through the open boundary of the Bohai straitand adopting 5′ x 5′ horizontal resolution the whole fluid field of the Bohai Sea was firstsimulated. The computed harmonic constants of m_1 and M_2 tides at seventeen observational stationsalong the coast of the Bohai Sea matched the observed values rather well. Taking the calculatednumerical results as open boundary conditions, the local fluid field in the Kendong Oil Field bymeans of 1′ x 1′ horizontal resolution was then investigated. In the course of calculation, finegrids were embedded in coarse grids so as to enhance the computational order. In addition, thelatest water-depth data of the Huanghe Delta coast area were adopted, thus topographic changesbecause of silt sediment in that region wouldn''t affect the computed results. In the end, byanalyzing the relative changes of the fluid field before and after the dam was established, that theeffect on the dynamic environment of the local sea area mainly concentrated on the adjacentpositions north and south of the dam was suggested.展开更多
This paper presents a high-resolution (2′X2′) numerical model of coastalcoupled wave-current interaction with explicit consideration of the effects of wave-currentinteraction on bottom stress. For two selected storm...This paper presents a high-resolution (2′X2′) numerical model of coastalcoupled wave-current interaction with explicit consideration of the effects of wave-currentinteraction on bottom stress. For two selected storms with measured data in the Yellow River coastalarea of the Bohai Sea, it is shown that the bottom stress calculated by using a coupledwave-current model is increased, as one would expect, compared with the bottom stress computed withan uncoupled current model. Moreover, the current velocity field is also changed, but thecorresponding current directions show less influence in the two simulations. The extents of changesin bottom stress and current velocity vary with storm intensities. The results further imply thatthe coupled wave-current model should be used as the basis for simulating the current velocity andsea level in the near shore region.展开更多
The focus of this study is a coastal high-resolution (2′ X 2′ ) two-waycoupled wave-tide-surge interaction model, including three main physical mechanisms. Comparisons andanalysis of simulated and measured wave heig...The focus of this study is a coastal high-resolution (2′ X 2′ ) two-waycoupled wave-tide-surge interaction model, including three main physical mechanisms. Comparisons andanalysis of simulated and measured wave heights and sea level considered two moderate storm casesfor the Huang-he Delta coastal area. The effects of different physical mechanisms on wave heightsare mainly influenced by wave-current interaction, including radiation stress. Wave-age dependentsurface wind stress and radiation stress mechanisms in the coupling wave-tide-surge interactionmodel show positive impact on sea level, and the wave-current interaction bottom stress mechanismshows negative impact on seal level. The comprehensive effects of the three main physical mechanismsshow positive net impact on seal level and increase sea level by around 20cm for the stormsconsidered. Overall, the results we show that the wave heights and sea levels simulated by thecoupled wave-tide-surge model agree better with the measured values than uncoupled model results,particularly for peak storm conditions.展开更多
文摘In this paper a three-dimensional tidal current model has been used toexamine variations of local fluid field due to establishment of a dam. By imputing ten tides-K_1,O_1, P_1 , Q_1, M_2, S_2, N_2, K_2 , S_a and S_(sa) through the open boundary of the Bohai straitand adopting 5′ x 5′ horizontal resolution the whole fluid field of the Bohai Sea was firstsimulated. The computed harmonic constants of m_1 and M_2 tides at seventeen observational stationsalong the coast of the Bohai Sea matched the observed values rather well. Taking the calculatednumerical results as open boundary conditions, the local fluid field in the Kendong Oil Field bymeans of 1′ x 1′ horizontal resolution was then investigated. In the course of calculation, finegrids were embedded in coarse grids so as to enhance the computational order. In addition, thelatest water-depth data of the Huanghe Delta coast area were adopted, thus topographic changesbecause of silt sediment in that region wouldn''t affect the computed results. In the end, byanalyzing the relative changes of the fluid field before and after the dam was established, that theeffect on the dynamic environment of the local sea area mainly concentrated on the adjacentpositions north and south of the dam was suggested.
文摘This paper presents a high-resolution (2′X2′) numerical model of coastalcoupled wave-current interaction with explicit consideration of the effects of wave-currentinteraction on bottom stress. For two selected storms with measured data in the Yellow River coastalarea of the Bohai Sea, it is shown that the bottom stress calculated by using a coupledwave-current model is increased, as one would expect, compared with the bottom stress computed withan uncoupled current model. Moreover, the current velocity field is also changed, but thecorresponding current directions show less influence in the two simulations. The extents of changesin bottom stress and current velocity vary with storm intensities. The results further imply thatthe coupled wave-current model should be used as the basis for simulating the current velocity andsea level in the near shore region.
文摘The focus of this study is a coastal high-resolution (2′ X 2′ ) two-waycoupled wave-tide-surge interaction model, including three main physical mechanisms. Comparisons andanalysis of simulated and measured wave heights and sea level considered two moderate storm casesfor the Huang-he Delta coastal area. The effects of different physical mechanisms on wave heightsare mainly influenced by wave-current interaction, including radiation stress. Wave-age dependentsurface wind stress and radiation stress mechanisms in the coupling wave-tide-surge interactionmodel show positive impact on sea level, and the wave-current interaction bottom stress mechanismshows negative impact on seal level. The comprehensive effects of the three main physical mechanismsshow positive net impact on seal level and increase sea level by around 20cm for the stormsconsidered. Overall, the results we show that the wave heights and sea levels simulated by thecoupled wave-tide-surge model agree better with the measured values than uncoupled model results,particularly for peak storm conditions.
