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本文报道了 1997年和 1998年夏季对藏北色林错等水体水文特征的考察情况 .结果表明 ,色林错是一个大型深水湖泊 ,表层水温在下午 4 :30左右达到最高 ,清晨 7:30左右时最低 .浅水区域表层湖水在 6月份的极端最高水温为 2 1.2℃ ,极端最低水温为 11.0℃ ,而日平均水温变幅仅 5.6℃ ,其幅度大于在同一时段湖区内不同区域之间表层水温的变化 .色林错湖水的 pH值较高 ,为 9.19- 9.66;表层水的 pH昼夜变化较小 ,仅 0 .15,最高值出现在凌晨 ,同时水体不同区域及深度的 pH值基本一致 .其溶解氧变化在 4 .62 - 5.12mg/L ,而且不同深度水层之间的变幅较小 ,仅 0 .0 3- 0 .35mg/L ;但其湖汊浆东如瑞溶解氧的昼夜变幅为 4 .58- 5.59mg/L ;盐度的日变幅为1.60 % - 2 .2 0 % .考察表明 ,藏北水体的盐分有一个从河流到湖泊、以及由流水向静水富集的趋势 ;鱼类的分布与水体盐分的含量密切相关 ,即鱼类随着水体盐分的增加而消失 ,代之以嗜盐性卤虫的出现及大量繁衍 .
This paper reports the investigation of the hydrological characteristics of the watershed such as the Seerlin in Tibet during the summer of 1997 and 1998. The results show that Seir forest is a large deep lake with the surface water temperature reaching the highest at about 4:30 pm and the morning at 7:30 am The lowest in June and the lowest in June 2009. The extreme maximum water temperature of surface water in shallow water area was 2 1.2 ℃ in June and the extreme minimum water temperature was 11.0 ℃ and the daily average water temperature fluctuated only 5.6 ℃ and its amplitude was greater than that of the surface water between different regions in the same lake The temperature of the water changed.The highest pH of Sehulin Lake was 9.19- 9.66, and the pH value of surface water changed little at night, only 0.15, the highest appeared in the early morning, and the pH values of different areas and depths of water body were basically the same The change of dissolved oxygen was between 4.62-5.12mg / L, and the amplitude of water between different depths was small, only 0. 0 3- 0. 35mg / L; however, The diurnal variation of salinity was 1.60% -2.20%. The investigation showed that the salinity of the water in northern Tibet had a change from river to lake, as well as from flowing water to still water Enrichment trend; the distribution of fish and the water content of salt is closely related to fish With increasing salinity of the water and disappeared, replaced by halophilic Artemia appear and flourish.