青藏工程走廊热融湖湖底热状态
发布时间：2018-10-04 19:31
【摘要】：热融湖塘对寒区环境可产生较大影响,其侧向热侵蚀会诱发冻土工程病害.选取青藏工程走廊热融湖塘分布密集的楚玛尔河、五道梁、北麓河3个亚区,于2009—2010年通过HOBO水位传感器对4个固定湖塘的连续监测和大量湖塘的随机观测,探讨了不同季节、不同水深湖底的热状态.在结冰期的1月中旬,楚玛尔河90%以上的湖塘湖底温度都在0℃以下,主要与湖塘较浅和湖水高矿化度有关.五道梁和北麓河湖底温度相对较高,只有约20%的湖底温度低于0℃,这些湖水深小于最大冻结冰层厚度;最高温度高于4℃,主要与湖较深有关.但3个亚区湖底温度均随着水深增加而增加.在6~9月融冰期,湖底温度普遍增加,最高达到18℃以上,浅湖增温快于深湖,湖底温度随着水深增加而递减.湖底温度年际变化近似为正弦曲线,在1~2月,湖底温度最低,之后逐渐升高,到7~8月,湖底温度达到最高.
[Abstract]:The cold region environment can be greatly affected by the heat thawing lake pond, and its lateral thermal erosion will induce the engineering diseases of frozen soil. Three subareas of Chumar River, Wudaoliang and Beilu River, which are densely distributed in the corridor of Qinghai-Xizang Project, are selected. The continuous monitoring of four fixed lake ponds and the random observation of a large number of lakes and ponds were carried out through HOBO water level sensor in 2009-2010. The thermal state of lake bottom in different seasons and different water depth is discussed. In the middle of January, 90% of the lake bottom temperature of the Chumar River is below 0 鈩，
本文编号：2251597
[Abstract]:The cold region environment can be greatly affected by the heat thawing lake pond, and its lateral thermal erosion will induce the engineering diseases of frozen soil. Three subareas of Chumar River, Wudaoliang and Beilu River, which are densely distributed in the corridor of Qinghai-Xizang Project, are selected. The continuous monitoring of four fixed lake ponds and the random observation of a large number of lakes and ponds were carried out through HOBO water level sensor in 2009-2010. The thermal state of lake bottom in different seasons and different water depth is discussed. In the middle of January, 90% of the lake bottom temperature of the Chumar River is below 0 鈩，
本文编号：2251597
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