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旅游接待地的社会文化是旅游活动产生的诱因与支持力.但目前许多旅游接待地的社会文化均受到不同程度的侵害,表现出对旅游客源地的社会文化和旅游接待地的经济发展的"仆从化"趋势.本文在剖析其趋势形成原因的基础上,指出保护旅游接待地文化对旅游的可持续发展尤为迫切和重要,并试图探索一条使旅游与社会文化发展双赢的道路. 相似文献
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旅游接待地的社会文化是旅游活动产生的诱因与支持力。但目前许多旅游接待地的社会文化均受到不同程度的侵害，表现出对旅游客源地的社会文化和旅游接待地的经济发展的“仆从化”趋势。本文在剖析其趋势形成原因的基础上，指出保护旅游接待地文化对旅游的可持续发展尤为迫切和重要，并试图探索一条使旅游与社会文化发展双赢的道路。 相似文献
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An Improved Nearshore Wave Breaking Model Based on the Fully Nonlinear Boussinesq Equations 总被引：1，自引：2，他引：1
This paper aims to propose an improved numerical model for wave breaking in the nearshore region based on the fully nonlinear form of Boussinesq equations. The model uses the k equation turbulence scheme to determine the eddy viscosity in the Boussinesq equations. To calculate the turbulence production term in the equation, a new formula is derived based on the concept of surface roller. By use of this formula, the turbulence production in the one-equation turbulence scheme is directly related to the difference between the water portide velocity and the wave celerity. The model is verified by Hansen and Svendsen‘s experimental data (1979) in terms of wave height and setup and sctdown. The comparison between the model and experimental results of wave height and setup and setdown shows satisfactory agreement. The modeled turbulence energy decreases as waves attenuate in the surf zone. The modeled production term peaks at the breaking point and decreases as waves propagate shoreward. It is also suggested that both convection and diffusion play their important roles in the transport of turbulence energy immediately after wave breaking. When waves approach to the shoreline, the production and dissipation of turbulence energy are almost balanced. By use of the slot technique for the simulation of the movable shoreline boundary, wave ranup in the swash zone is well simulated by the present model. 相似文献
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