大坝下游河岸带冬夏季水热交换特征对比

发布时间：2018-05-04 14:17

本文选题：新安江下游 + 河岸带　；参考：《水科学进展》2017年01期

【摘要】：为对比水库下游河岸带冬夏季潜流交换特征及温度场分布规律,在新安江大坝下游开展了河道水、河岸带地下水的水位与温度监测,并结合达西定律推广式等理论进行了分析。结果表明:不论冬夏季,侧向潜流交换量与河道水位呈逆时针"绳套"关系,且离河道越近潜流交换强度越大;冬、夏季潜流交换强度与补给方式存在明显不同,在近河岸处单宽交换总体积分别为55.23 m3(周)、75.08 m3(周),夏季主要为河道补给河岸带,冬季相反,此外,夏季交换范围更大且交换更快;河岸带温度场受低温波动水影响显著,在垂直方向上夏季表现为"上暖下凉",冬季相反,在水平方向上夏季低温传播距离较大,且具有明显的分区。因此,在水库下游河流生态治理过程中,应适当考虑不同季节的影响。
[Abstract]:In order to compare the characteristics of subsurface flow exchange and the distribution of temperature field in winter and summer in the downstream riparian zone of the reservoir, the monitoring of water level and temperature of river channel water and groundwater in riverbank zone is carried out in the lower reaches of Xinanjiang Dam, and the analysis is carried out based on Darcy's law theory. The results show that, in winter and summer, there is a counterclockwise "rope sleeve" relationship between the lateral flow exchange and the water level of the river, and the closer the submersible flow is to the channel, the greater the exchange intensity is, and the obvious difference exists between the exchange intensity and the recharge mode in winter and summer. The total volume of single width exchange is 55.23 m ~ 3 at the near riparian bank (Zhou Gui 75.08 m ~ 3). The summer is mainly a river recharge riparian zone, but in winter, the summer exchange range is larger and the exchange is faster, and the temperature field of the riparian zone is significantly affected by the low temperature fluctuating water. In the vertical direction, the summer is "warm and cool" in summer. On the contrary, in winter, the propagation distance of low temperature in summer is large in horizontal direction, and there are obvious zones in summer. Therefore, the influence of different seasons should be taken into account in the process of ecological control of the lower reaches of the reservoir.
【作者单位】：河海大学水利水电学院;江西水利科学研究院;
【基金】：国家自然科学基金资助项目(51279045)~~
【分类号】：TV123

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