LIMNOLOGICAL PROPERTIES OF A ROCKY MOUNTAIN HEADWATER RESERVOIR1
作者:
Michael D. Marcus,
期刊:
JAWRA Journal of the American Water Resources Association
(WILEY Available online 1989)
卷期:
Volume 25,
issue 1
页码: 15-25
ISSN:1093-474X
年代: 1989
DOI:10.1111/j.1752-1688.1989.tb05662.x
出版商: Blackwell Publishing Ltd
关键词: montane headwater reservoir;nutrient enrichment;longitudinal flow patterns;trophic status
数据来源: WILEY
摘要:
ABSTRACT:Hyalite Reservoir, Montana, was studied to determine properties of this small, montane, headwater, deep‐release reservoir relative to reservoirs at lower elevations. While retention times for waters were as brief as 12 d, the mean residency of 40 d from mid‐March to mid‐December was within the range reported for other reservoirs. No significant through‐reservoir gradients for suspended sediments were observed, contrasting to observations for most reservoirs. Thermal stratification, evident during the first part of the summer, was disrupted in August by cool, dense tributary inflows and strong wind‐induced mixing. Dissolved oxygen concentrations paralleled temperature patterns in the reservoir; lowest average values for both occurred in waters sampled nearest the outlet. Total phosphorus averaged greater than twice the total nitrogen concentrations; greatest average concentrations for both were found in the near‐bottom waters nearest the outlet. Enrichment of nitrogen concentrations in outflow over inflow waters is hypothesized to occur through nitrogen fixation byAphanizonwnon flos‐aquae. Despite the relatively high quality of waters from tributary inflows, an algal bloom, chlorophyll a concentrations, and primary productivity estimates suggested that the reservoir was mesotrophic. Circulation of waters within the reservoir was primarily influenced by wind‐induced mixing, thermal gradients, and currents produced by the de
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