Chemical water quality studies in the Central Patagonian Region of Chile following the eruption of Volcan Hudson
Chemical water quality studies in the Central Patagonian Region of Chile following the eruption of Volcan Hudson
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哈德逊火山喷发后智利巴塔哥尼亚中部地区的化学水质研究
DOI：
10.1007/bf00025417
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发表时间：
1996
期刊：
影响因子：
2.6
通讯作者：
R. Manly
中科院分区：
文献类型：
--
作者：
John Weaire;R. Manly
1993年2 / 3月，在智利第十一区不同地点的九个淡水湖测量了一系列水质变量。其中7个湖泊位于里约热内卢Ibanez（46°08'S）和Lago Lapparent（46°14'S）之间，其特点是矿物质和营养物质浓度低，类似于智利阿劳坎尼亚地区（39°S至42°S）的贫营养湖泊。这些地点的硫酸盐浓度都高得不成比例，有人认为这是1991年8月哈德逊火山爆发后火山灰沉积的结果。在火山灰沉积带北部的第9口湖井中发现的硫酸盐浓度比在主要研究区域内通常测量的浓度低35倍。拉普兰湖是一个巨大的“蓝色”湖泊，容纳了冰川沉积物，形成了研究区域的南部边界。在这个地方发现的矿物质和营养物质的浓度通常甚至低于该地区其他七个湖泊的浓度。对250 ml水样进行固相萃取，未检出有机氯农药。
In February/March, 1993, a range of water-quality variables were measured in nine freshwater lakes at different locations in Region XI, Chile. Seven of the lakes, situated between the Rio Ibanez (46 °08′S) and Lago Lapparent (46 °14′S), are characterised by low concentrations of minerals and nutrients, similar to the oligotrophic lakes of the Araucanian district of Chile (39 °S to 42 °S).Sulphate concentrations were disproportionately high at each of these sites and it is proposed that this results from the deposition of volcanic ash following the eruption of Volcan Hudson in August, 1991. The concentration of sulphate found in a ninth lake well to the north of the ash deposition zone was 35 fold lower than those typically measured within the main study area.Lago Lapparent is a large ‘blue’ lake receiving glacial sediments, that forms the southern boundary of the area studied. Concentrations of minerals and nutrients found at this site were generally even lower than those found in the other seven lakes within the area. Organochlorine pesticides were not detected at any of the sites after solid phase extraction of 250 ml water samples.