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首页> 外文期刊>Journal of the American Water Resources Association >SIMULATED EFFECTS OF ALTERED SPILLWAY RELEASES ON THERMAL STRUCTURE AND KOKANEE GROWTH IN A COLORADO RESERVOIR
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SIMULATED EFFECTS OF ALTERED SPILLWAY RELEASES ON THERMAL STRUCTURE AND KOKANEE GROWTH IN A COLORADO RESERVOIR

机译：科罗拉多州储层的溢洪道变化对热力结构和千叶烷生长的模拟影响

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摘要

In-reservoir thermal and ecological effects of releasing some flows over the surface spillway at Blue Mesa Reservoir, Colorado, rather than routing all releases through the hypolimnetic outlet were evaluated using a calibrated and validated one-dimensional thermal model (CE-THERM) with a set of ecological models. Thermal model output indicated that surface water temperatures were influenced primarily by atmospheric conditions, but the release of warmer water over the spillway resulted in a thinner epilimnion and cooler metalimnet-ic water temperatures. Ecological model predictions indicated that spillway releases and associated temperatures resulted in lower growth rates for young-of-year (YOY) kokanee salmon (Oncorhynchus nerka) in the reservoir by up to 9 percent when compared with growth rates under baseline operations with no releases over the spillway. Kokanee growth rates were reduced under spillway release scenarios because lower temperatures not only affected metabolic rates, but limited the productivity of the zooplankton as well. Thus, altering the release regime with spillway discharges could have deleterious effects on Blue Mesa's YOY kokanee. However, in other reservoirs, distributing discharges among different elevations may provide managers with a mechanism to regulate temperatures to benefit species of concern that are facing challenges imposed by environmental conditions such as global warming.
机译：使用经过校准和验证的一维热模型（CE-THERM）评估了科罗拉多州蓝梅萨水库在地表溢洪道上释放一些水流而不是通过低通透性出口路由所有释放的储层内部热生态效应。生态模型集。热模型输出表明，地表水温度主要受大气条件的影响，但是溢洪道上较温暖的水的释放导致较薄的lim水和较冷的金属磁性水温。生态模型预测表明，溢洪道的释放和相关的温度导致水库中年幼（Koyee kokanee）鲑（Oncorhynchus nerka）的增长率比基线操作下的增长率低9％，且没有超过溢洪道。在溢洪道释放的情况下，Kokanee的增长率降低了，因为较低的温度不仅影响代谢率，而且还限制了浮游动物的生产力。因此，改变溢洪道排放的释放方式可能会对Blue Mesa的YOY kokanee产生有害影响。但是，在其他水库中，在不同海拔之间分布排放物可能会为管理人员提供一种调节温度的机制，以使面临环境条件（例如全球变暖）带来挑战的受关注物种受益。

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