Hydrodynamic Characteristics of Tributary River Estuary under TGR Water Inpouring and Drainage Conditions
Abstract: As Three Gorges Reservoir changes seasonally, hydrodynamic characteristics of tributary estuaries around vary correspondingly. Water dilution and self-purification ability faded, water environmental capacity declined, and then it influences the water quality of tributary and the safety of drinking water around reservoir area. Studying hydrodynamic characteristics under the condition of impoundment and drainage in tributary estuaries, and proposing effective measures for improving hydrodynamic condition have a significant effect on improving the tributaries’ water quality in reservoir area and guaranteeing the safety of water supplies. Yulin River, a tributary of Three Gorges Reservoir, was chosen as a studying object, simulating estuaries’ variation of hydrodynamic characteristics during its impoundment and drainage period, furthermore analyzing evolution law of hydrodynamics. The results indicated that during the period of impoundment, the average velocity of the estuary surface was 0.026 m/s; the average velocity of the estuary bottom was 0.027 m/s. The bulk velocity was slow, influencing the diffusion of waste, which strongly needs intensive control on surface source and preventing harmful algae blooming due to risen temperature by storage of nutriment. During the period of drainage, the average velocity of the estuary surface was 0.21 m/s, however, the average velocity of the estuary bottom was 0.034 m/s. Although it possessed high surface velocity, there were no much differences in bottom velocity between impoundment period and drainage period, resulting in accumulation of nutritive salt and heavy mental in the bottom.
文章引用: 龙明梅 , 艾海男 , 刘步云 , 何 强 , 孙兴福 , 李 宏 (2017) 三峡蓄放条件下御临河口水动力特性研究。 水资源研究， 6， 357-369. doi: 10.12677/JWRR.2017.64043
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