The role of river inputs on the hypolimnetic chemistry of a productive reservoir: implications for management of anoxia and total phosphorus internal loading
The role of river inputs on the hypolimnetic chemistry of a productive reservoir: implications for management of anoxia and total phosphorus internal loading
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河流输入对生产性水库低湖化学的作用：对缺氧和总磷内部负荷管理的影响
DOI：
10.1080/07438140809354053
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
J. Armengol
中科院分区：
文献类型：
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作者：
R. Marcé;E. Moreno;J. Armengol
摘要 利用 11 年的监测数据，研究了 DOC 和硝酸盐河流输入对平流主导的峡谷形 Sau 水库（西班牙）夏季低浅层氧气和营养动态的影响。夏季进入水库的河水是决定低浅层氧气和营养物浓度的主要驱动因素。因此，体积标准化的低湖氧浓度与河流 DOC 高度相关，但与表湖初级生产的替代物或湖内特征不显着相关。此外，缺氧的面积范围和硝酸盐浓度控制了低层中的总磷含量，这表明河流 DOC 和硝酸盐输入控制了磷的内部负荷。由于河流水质的改善是在水库流域实施先进污水处理厂的结果，因此我们提倡使用这些解决方案来管理水库富营养化问题。我们的结果应该促使水库湖沼学家始终考虑外来来源对低湖沼氧含量和营养动态的可能的直接影响，特别是在受人类影响的系统中。
Abstract The effect of DOC and nitrate river inputs on summer hypolimnetic oxygen and nutrient dynamics in the advective-dominated, canyon-shaped Sau Reservoir (Spain) was investigated using 11 years of monitoring data. River water entering the reservoir during summer was the main driver defining hypolimnetic oxygen and nutrient concentration. Thus, volume-normalized hypolimnetic oxygen concentration was highly correlated with the river DOC, but not significantly correlated with surrogates of the epilimnetic primary production or with in-lake features. Also, the areal extent of anoxia and nitrate concentration controlled total phosphorus content in the hypolimnion, suggesting that the river DOC and nitrate inputs control internal load of phosphorus. Because improvement of the river water quality was the consequence of implementation of advanced wastewater treatment plants in the reservoir watershed, we advocate these solutions to manage reservoir eutrophication problems. Our results should prompt reservoir limnologists to always take into account the probable, direct effect of allochthonous sources in the hypolimnetic oxygen content and nutrient dynamics, especially in human-impacted systems.