Abstract Horne AJ. 2019b. Hypolimnetic oxygenation 4. Effects on turbidity in Camanche Reservoir and its downstream fish hatchery. Lake and Reserve Manage. 36:360–375. Turbidity is a major concern for reservoir, river, and hatchery managers, partially because sediments smother fish eggs. The oxygenated plume of the Camanche Reservoir hypolimnetic oxygenation system (HOS) is close enough to the sediments to suppress releases of nutrients, hydrogen sulfide, and methylmercury. Experiments and models predicted little sediment resuspension from the plume. On/off in-reservoir tests in the initial year of HOS operation (1993) showed a small (x = 1.4 NTU) and not statistically significant increase in average turbidity that extended over 300 m, was minimal at 1.5 km (0.3 NTU), and was not apparent in the next year (1994). Increased turbidity was attributed to tiny (<2 μm) calcite particles caused by lake whitening during intense periods of photosynthesis during cyanobacterial blooms prior to HOS. Turbidity in the fish hatchery declined substantially (4 to 2 NTU, summer 1991 vs. 1994) and averaged 2.5 NTU in 1999 and 2009. This decline is likely due to the 79% HOS-induced decrease in chlorophyll, because bottom turbidity was related to algae blooms (R2 = 0.57) if lagged by 4 weeks to allow the algae to sink. The result would be less planktonic remains and fewer lake whitening particles sinking to deep water. Microscopic examination, size spectrum analysis, and chemical fingerprinting of particles showed that egg tray sediments (mostly inorganic silica diatom frustules and aeolian dust with an even size spectrum from 0 to 200 μm) were not like those in the reservoir bottom water outflow (mostly organic and <2-μm calcite particles).

中文翻译：

---

低浓度氧合 4. 对卡曼奇水库及其下游鱼类孵化场浊度的影响

摘要霍恩 AJ。2019b。低浓度氧合 4. 对卡曼奇水库及其下游鱼类孵化场浊度的影响。湖泊和保护区管理。36:360–375。浊度是水库、河流和孵化场管理者的主要关注点，部分原因是沉积物会窒息鱼卵。卡曼奇水库低水位氧合系统 (HOS) 的含氧羽流与沉积物足够接近，可以抑制营养物质、硫化氢和甲基汞的释放。实验和模型预测羽流中几乎没有沉积物再悬浮。在居屋运行的最初一年（1993 年）进行的开/关水库测试显示，平均浊度有一个小的（x = 1.4 NTU）增加，并且没有统计学意义的显着增加，超过 300 m，最小为 1.5 km（0.3 NTU），并且在第二年（1994 年）不明显。增加的浊度归因于在居屋前的蓝藻水华期间，在强烈的光合作用期间，湖泊变白引起的微小（<2 μm）方解石颗粒。鱼孵化场的浊度大幅下降（4 到 2 NTU，1991 年夏季与 1994 年相比），1999 年和 2009 年平均为 2.5 NTU。这种下降可能是由于居屋中叶绿素减少 79%，因为底部浊度与如果滞后 4 周让藻类下沉，藻类就会大量繁殖 (R2 = 0.57)。结果将是更少的浮游生物残留和更少的湖泊白化颗粒沉入深水中。显微镜检查、尺寸谱分析、