摘要
通过室内中型水槽实验模拟分层水体受到突然扰动后水体盐分浓度及含盐总量的变化,探讨海湾水库的突然泛咸机理。结果表明,水体受到强烈扰动后,底部咸水与上层淡水的混合将导致库水整体泛咸;表层沉积物中的盐分也是库水泛咸的重要盐源,扰动条件下表层沉积物盐分的增强释放将强化库水的泛咸程度。海湾水库水体的分层结构与稳定强度明显不同于温度分层水库,导致它与温度分层水库的混合频次不同。海湾水库运行过程中,可以采用机械抽排水库底层咸水等措施来抑制库水泛咸。研究结果可为海湾水库的突然泛咸管理提供理论与实践依据。
We explored the mechanism of abrupt salinization in estuary reservoirs by evaluating the changes of the profiles of salt concentration and the amount of salt in a water column under the conditions of abrupt disruption of stratified water in a medium-sized flume. The results show that the mixing of the salt water in the benthic boundary layer and the fresh water in the top layer leads to salinization, while the solutes released from the surficial sediments under disruption conditions are the additional sources of salt. The stratification structure and stability are distinct between the water with salinity stratification and the water with thermal stratification, leading to different mixing frequencies. We can discharge the benthic salt water to suppress the abrupt salinization during the operation of estuary reservoirs. This study may provide a theoretical and practical basis for the control of abrupt salinization in estuary reservoirs.
出处
《水资源保护》
CAS
2013年第4期40-44,共5页
Water Resources Protection
基金
国家自然科学基金(51279075)
山东省自然科学基金(ZR2009EQ001
ZR2011DM001)
关键词
海湾水库
突然泛咸
底边界层
混合
孔隙咸水
estuary reservoir
abrupt salinization
benthic boundary layer
mixing
salty pore water
作者简介
岳大伟（1989-），男，硕士研究生，主要从事水资源利用与保护方面的研究。E—mail：xxyzw314@sina．com
