【摘要】：熱融湖塘對寒區(qū)環(huán)境可產(chǎn)生較大影響,其側(cè)向熱侵蝕會(huì)誘發(fā)凍土工程病害.選取青藏工程走廊熱融湖塘分布密集的楚瑪爾河、五道梁、北麓河3個(gè)亞區(qū),于2009—2010年通過HOBO水位傳感器對4個(gè)固定湖塘的連續(xù)監(jiān)測和大量湖塘的隨機(jī)觀測,探討了不同季節(jié)、不同水深湖底的熱狀態(tài).在結(jié)冰期的1月中旬,楚瑪爾河90%以上的湖塘湖底溫度都在0℃以下,主要與湖塘較淺和湖水高礦化度有關(guān).五道梁和北麓河湖底溫度相對較高,只有約20%的湖底溫度低于0℃,這些湖水深小于最大凍結(jié)冰層厚度;最高溫度高于4℃,主要與湖較深有關(guān).但3個(gè)亞區(qū)湖底溫度均隨著水深增加而增加.在6~9月融冰期,湖底溫度普遍增加,最高達(dá)到18℃以上,淺湖增溫快于深湖,湖底溫度隨著水深增加而遞減.湖底溫度年際變化近似為正弦曲線,在1~2月,湖底溫度最低,之后逐漸升高,到7~8月,湖底溫度達(dá)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，

本文編號：2251597