如前所述,冻土中未冻水的野外观测还没有可靠的技术.
As mentioned above, there is no reliable technology for the field observation of the unfrozen water in permafrost.
而现有资料中青藏沿线土的相关数据又太少,不足以支持本文的需要.
And currently there is little relevant data of permafrost along the Qinghai-Tibetan highway to serve this paper.
因此,本文采用温度—未冻水关系函数来计算冻土中的未冻水含量.
Hence, this paper adopt the temperature-unfrozen water function to calculate the unfrozen water content in permafrost.
未冻水含量和负温具有如下关系式[20]：
The relationship between the content of unfrozen water and the negative temperature can be expressed as below:
(2-6)
式中： 为未冻水含量,%； 为负温绝对值,℃；a和b为经验系数.
In this function, ~represents the content of unfrozen water,%;~ represents the absolute value of negative temperature,℃; a and b represent experience coefficients.
