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首页> 外文期刊>Limnology >Observation of anoxic water mass in a tropical reservoir: the Cirata Reservoir in Java, Indonesia
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Observation of anoxic water mass in a tropical reservoir: the Cirata Reservoir in Java, Indonesia

机译：热带水库缺氧水团的观测：印度尼西亚爪哇的Cirata水库

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摘要

We conducted a transect survey of water quality and bottom sediments in a large tropical reservoir, the Cirata Reservoir, located on the Citarum River, West Java, Indonesia. In the main basin of this reservoir, the surface water contained high concentrations of chlorophyll a, up to 48 mu g l(-1), and most of the water body was occupied by thick anoxic water. The thickness of the surface oxygenated water was only 5-7 m, whereas that of the anoxic water mass was more than 70 m. The concentrations of phosphate and ammonia were quite high in the anoxic hypolimnion. The reasons for the formation of the huge anoxic water mass include the oligomictic status of circulation, a relatively weak mixing caused by topography, high hypolimnion temperature, and high loads of organic matter. The carbonitrogen (C/N) ratios and the carbon stable isotope ratios of sediments indicated that the major source of organic carbon in the sediments was algal production in the reservoir and fish culture activity. The mechanism of eutrophication in the reservoir is also discussed.
机译：我们对位于印度尼西亚西爪哇省奇塔鲁姆河上的大型热带水库Cirata水库进行了水质和底部沉积物的横断面调查。在该水库的主盆地中，地表水含有高浓度的叶绿素a，高达48μg l（-1），并且大部分水体被浓稠的缺氧水占据。表面含氧水的厚度仅为5-7 m，而缺氧水团的厚度大于70 m。在缺氧性水lim病中磷酸盐和氨的浓度很高。形成巨大的缺氧水团的原因包括循环的寡聚状态，地形引起的相对较弱的混合，较高的次limlimion温度和有机物的高负荷。沉积物的碳/氮（C / N）比和碳稳定同位素比表明，沉积物中有机碳的主要来源是水库中的藻类生产和鱼类养殖活动。还讨论了水库富营养化的机理。

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