Effect of ship locking on sediment oxygen uptake in impounded rivers
Effect of ship locking on sediment oxygen uptake in impounded rivers
复制标题
船闸对蓄水河流沉积物吸氧量的影响
DOI：
10.1029/2012wr012483
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发表时间：
2012
影响因子：
5.4
通讯作者：
H. Fischer
中科院分区：
文献类型：
--
作者：
D. F. McGinnis;A. Maeck;H. Fischer
在大多数大型河流系统中，流量受到运营和管理活动（例如船舶锁定）的调节和/或影响。使用涡相关通量测量在萨尔河（德国）12.9 公里长的蓄水池内研究了船闸操作对沉积物-水氧通量的影响。连续观察时间段近5天，共发生39个单独的锁定事件。船舶锁定与通过蓄水池来回传播的浪涌的产生有关，这会导致近床水流速度和湍流的强烈变化。这些波浪引起的流量变化导致沉积物-水氧通量的变化。虽然没有船闸操作期间的平均通量为 0.5 ± 0.1 g m−2d−1 ，但在船闸操作期间，它增加了约 2 倍至 1.0 ± 0.5 g m−2d−1 。按照船闸的每日运行时间表，流量主要在白天增强，并遵循明显的昼夜节律。通量增加的驱动力是通过底部边界层湍流和可能的再悬浮增强穿过沉积物-水界面的扩散传输。讨论了水闸引起的流量变化影响蓄水池氧气收支的其他方法。
In the majority of large river systems, flow is regulated and/or otherwise affected by operational and management activities, such as ship locking. The effect of lock operation on sediment‐water oxygen fluxes was studied within a 12.9 km long impoundment at the Saar River (Germany) using eddy‐correlation flux measurements. The continuous observations cover a time period of nearly 5 days and 39 individual locking events. Ship locking is associated with the generation of surges propagating back and forth through the impoundment which causes strong variations of near‐bed current velocity and turbulence. These wave‐induced flow variations cause variations in sediment‐water oxygen fluxes. While the mean flux during time periods without lock operation was 0.5 ± 0.1 g m−2d−1, it increased by about a factor of 2 to 1.0 ± 0.5 g m−2d−1within time periods with ship locking. Following the daily schedule of lock operations, fluxes are predominantly enhanced during daytime and follow a pronounced diurnal rhythm. The driving force for the increased flux is the enhancement of diffusive transport across the sediment‐water interface by bottom‐boundary layer turbulence and perhaps resuspension. Additional means by which the oxygen budget of the impoundment is affected by lock‐induced flow variations are discussed.
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影响因子：
11.4
作者：
S. Grant;I. Marusic
通讯作者：
S. Grant;I. Marusic
模拟热分层对蓄水河流氧气收支的影响
影响因子：
2.2
作者：
A. Becker;V. Kirchesch;H. Baumert;H. Fischer;Andreas Schöl
通讯作者：
Andreas Schöl
简单、坚固的涡相关放大器，用于水生溶解氧和硫化氢通量测量
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
D. McGinnis;S. Cherednichenko;S. Sommer;P. Berg;L. Rovelli;R. Schwarz;R. Glud;P. Linke
通讯作者：
P. Linke
浅层淡水中涡相关氧通量的测量：走向常规应用和分析
DOI：
--
发表时间：
2008
期刊：
影响因子：
--
作者：
D. McGinnis;P. Berg;A. Brand;Claudia Lorrai;Theresa J. Edmonds;A. Wüest
通讯作者：
A. Wüest
影响因子：
4.5
作者：
Berg, Peter;Roy, Hans;Wiberg, Patricia L.
通讯作者：
Wiberg, Patricia L.