摘要
利用山东羊庄盆地 5年的实测资料研究了包气带地温的变化特征 ,指出了地温变化的实际波形不是人们通常认为的正弦波。与正弦波相比它有两大差别 :一是上升波段的实际波形比正弦波形偏低 ,下降波段偏高 ;二是上半周期稍长 ,下半周期略短。在此基础上 ,提出了描述地温变化的统计方程。依据试验资料经计算得知 ,试验区地温梯度的绝对值在埋深 0 .1m处最大可达8.3 3°C/ m,在埋深 4m处最大仍有 1.2 2°C/ m,且地温梯度的分布具有明显的空间分带性和时间分期性。
Based on the 5 years monitoring data from the Yangzhuang Basin,Shandong,the paper studied the variability character of geotemperature in the aeration zone.The result is that the real wave shape of the geotemperature isn't the sine wave as is usually assumed.There are two differences between the real wave and the sine wave.One is that the upward part of the real wave is lower and its downward part is higher than the sine wave.The other is that the first half cycle is longer than the second.Then the statistic equation describing the variability character of the geotemperature is proposed.The calculation results shows that the absolute value of the geothermal gradient can reach 8.33°C/m when the burial depth is 0.1 m.While when the burial depth is 4 m,the greatest can still be up to 1.22°C/m,and the temperature distribution has the distinct character of space and time varying feature.The paper also discusses the effect of the geotemperature on the karstification and soil purification.
出处
《地质科技情报》
EI
CAS
CSCD
北大核心
2000年第3期65-69,共5页
Geological Science and Technology Information
关键词
包气带
地温
地温梯度
环境效应
aeration zone
geotemperature
geothermal gradient
environmental effect
