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首页> 外文期刊>Aquatic Sciences >Hydropower operations modulate sensitivity to meteorological forcing in a high altitude reservoir
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Hydropower operations modulate sensitivity to meteorological forcing in a high altitude reservoir

机译：水电操作调节高海拔水库气象迫使的敏感性

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摘要

Through the artificial manipulation of hydrological residence time, hydropower operations on alpine lakes should not only alter their hydro-biogeochemical characteristics but also modulate the degree of sensitivity of the lake to atmospheric forcing. These hypotheses were addressed by means of in situ observations that were combined with a three-dimensional lake model of a high-altitude pump-storage reservoir, i.e., Lake Corne, during the ice-free period. The fitted model (Pumping scenario) was used to simulate the hydrodynamics and oxygen concentrations of the lake under natural conditions (without pump-storage). Thereafter, the lake response to direct or catchment-mediated meteorological conditions (e.g., changes in inflows during storms) was investigated with a sensitivity analysis of the forcing parameters under both the pumping and natural hydrological scenarios. The pumping operation resulted in significant changes in water temperature, heat content and water mass stability during summer, as compared to a natural scenario. The lake hydrodynamics during the ice-free season were highly responsive to changes in the summer weather conditions, and more sensitive to realistic changes in cloudiness and water transparency than changes in air temperatures for both the pumped and natural scenarios. The spatial and temporal evolution of dissolved oxygen was comparatively less responsive to summer weather conditions, in both scenarios. The pump-storage operation from Lake Corne had a comparatively smaller effect on the lake functioning than the natural meteorological variability in summer. However, the pump-storage operation decreased the sensitivity of the lake hydrodynamics to changes in water transparency and limited water mass stability during summer.
机译：通过水文停留时间的人工操纵，高山湖泊的水电操作不仅应改变其水力生物地球化学特征，还应改变湖泊的敏感性至大气强制。这些假设通过原位观察解决，所述原位观察与高空泵储存储存器的三维湖模型相结合，即Corne在无冰期间。拟合模型（泵送方案）用于在自然条件下模拟湖泊的流体动力学和氧气浓度（无泵送）。此后，对直接或流量介导的气象条件（例如，暴风雨期间流入的变化）进行了对泵和自然水文情景的迫使参数的敏感性分析研究。与自然情景相比，泵送操作导致夏季水温，热含量和水质稳定性的显着变化。在无冰季的湖泊流体动力学对夏季天气条件的变化非常敏感，并且对云和自然情景的空气温度的变化更敏感，更敏感。在这两种情况下，溶解氧的空间和时间演化对夏季天气条件相对较小。来自康塞湖的泵送操作对湖泊功能比夏季的自然气象变异性相对较小。然而，泵送操作降低了湖泊流体动力学对夏季水透明度和水质稳定性有限的变化的敏感性。

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