Understanding the undular tidal bores in the Qiantang River is essential for effective river management and maintenance.While breaking tidal bores have been studied extensively, reports on undular tidal bores in the Q...Understanding the undular tidal bores in the Qiantang River is essential for effective river management and maintenance.While breaking tidal bores have been studied extensively, reports on undular tidal bores in the Qiantang Riverremain limited. Furthermore, observed data on undular tidal bores fulfilling the requirements of short measurementtime intervals, and spring, medium, and neap tide coverage, and providing detailed data for the global vertical stratificationof flow velocity are quite limited. Based on field observations at Qige in the Qiantang estuary, we analyzedthe characteristics of undular tidal bores. The results showed that the flooding amplitude (a) of the first wave isalways larger than its ebbing amplitude (b). Moreover, the vertical distribution of the maximum flood velocity exhibitesthree shapes, influenced by the tidal range, while that of the maximum ebb velocity exhibites a single shape. Duringthe initial phase of the flood tide in the spring and medium tides, the upper water body experiences multiple oscillatingchanges along the flow direction, corresponding to the alternating process of the crest and trough of the tide levelupon the arrival of the tidal bore. The tidal range is a crucial parameter in tidal bore hydrodynamics. By establishingthe relationship between hydrodynamic parameters and tidal range, other hydrodynamic parameters, such as the tidalbore height, maximum flood depth–averaged velocity, maximum flood stratified velocity at the measurement points,and duration of the flood tide current, can be effectively predicted, thereby providing an important reference for rivermanagement and maintenance.展开更多
探讨了在《高等学校课程思政建设指导纲要》实施背景和OBE(Outcome Based Education)教学理念下,如何将思政元素融入到专业课程教学,从而实现立德树人根本任务的新路径。园林苗圃学是研究园林苗木的培育理论和生产应用技术的一门专业基...探讨了在《高等学校课程思政建设指导纲要》实施背景和OBE(Outcome Based Education)教学理念下,如何将思政元素融入到专业课程教学,从而实现立德树人根本任务的新路径。园林苗圃学是研究园林苗木的培育理论和生产应用技术的一门专业基础课程。从园林苗圃学课程思政元素与教学内容的有机融合、园林苗圃学课程思政教学实践举例和园林苗圃学课程思政教学思考3个方面展开研究与探索。展开更多
基金supported by the National Natural Science Foundation of China(Grant No.42276176)the Joint Funds of the Zhejiang Provincial Natural Science Foundation of China(Grant No.LZJWZ23E090006)+2 种基金the Science and Technology Project of Zhejiang Provincial Department of Water Resources(Grant No.RC2233)the Key Project of Zhejiang Provincial Natural Science Foundation(Grant No.LZJWZ23E090003)the Joint Funds of the Zhejiang Provincial Natural Science Foundation of China(Grant No.LZJWY24E090002).
文摘Understanding the undular tidal bores in the Qiantang River is essential for effective river management and maintenance.While breaking tidal bores have been studied extensively, reports on undular tidal bores in the Qiantang Riverremain limited. Furthermore, observed data on undular tidal bores fulfilling the requirements of short measurementtime intervals, and spring, medium, and neap tide coverage, and providing detailed data for the global vertical stratificationof flow velocity are quite limited. Based on field observations at Qige in the Qiantang estuary, we analyzedthe characteristics of undular tidal bores. The results showed that the flooding amplitude (a) of the first wave isalways larger than its ebbing amplitude (b). Moreover, the vertical distribution of the maximum flood velocity exhibitesthree shapes, influenced by the tidal range, while that of the maximum ebb velocity exhibites a single shape. Duringthe initial phase of the flood tide in the spring and medium tides, the upper water body experiences multiple oscillatingchanges along the flow direction, corresponding to the alternating process of the crest and trough of the tide levelupon the arrival of the tidal bore. The tidal range is a crucial parameter in tidal bore hydrodynamics. By establishingthe relationship between hydrodynamic parameters and tidal range, other hydrodynamic parameters, such as the tidalbore height, maximum flood depth–averaged velocity, maximum flood stratified velocity at the measurement points,and duration of the flood tide current, can be effectively predicted, thereby providing an important reference for rivermanagement and maintenance.
文摘探讨了在《高等学校课程思政建设指导纲要》实施背景和OBE(Outcome Based Education)教学理念下,如何将思政元素融入到专业课程教学,从而实现立德树人根本任务的新路径。园林苗圃学是研究园林苗木的培育理论和生产应用技术的一门专业基础课程。从园林苗圃学课程思政元素与教学内容的有机融合、园林苗圃学课程思政教学实践举例和园林苗圃学课程思政教学思考3个方面展开研究与探索。
