Thermal regime at the Upper Stillwater dam site, Uinta mountains, Utah: Implications for terrain, microclimate and structural corrections in heat flow studies
Thermal regime at the Upper Stillwater dam site, Uinta mountains, Utah: Implications for terrain, microclimate and structural corrections in heat flow studies
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犹他州尤因塔山上斯蒂尔沃特坝址的热状况：对热流研究中地形、微气候和结构修正的影响
DOI：
10.1016/0040-1951(86)90305-7
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发表时间：
1986
期刊：
影响因子：
2.9
通讯作者：
D. Chapman
中科院分区：
文献类型：
--
作者：
Michael S. Bauer;D. Chapman
对犹他州东北部尤塔山脉上斯蒂尔沃特大坝遗址的地下热状态进行了详细的研究。温度测量在36个钻孔中进行，这些钻孔位于1平方公里的范围内，深度从20到97米不等。小于40 m深的孔仅用于获取年平均地表温度的空间变化信息。峡谷两侧距骨斜坡上或附近的几个洞的最低温度在10到20米之间接近0°C，这表明距骨底部全年都有冰。另一组孔洞显示了在我们测量之前3.5年清理建筑工地造成的地表变暖的瞬态热效应。其余大部分空穴具有导电性，梯度范围为13°~ 17°C km−1。对44个岩心样品的测量结果表明，前寒武纪石英岩的导热系数为5.6 (std. dev. 0.35) W m−1K−1。这些孔的表面热流估计范围为70至100 mW m−2。然而，地形和小气候对热场的局部扰动是相当大的。用有限差分法模拟这些影响，得到了局部校正后的Upper Stillwater热流约为75 mW m−2。考虑到来自unta盆地低导电性沉积岩的热量折射到坝址高导电性石英岩的影响，最后的校正产生了一个区域校正的Upper Stillwater热流，在60到65 mW m - 2之间。该数值与北至绿河流域和南至温塔盆地观测到的60 mW m−2的热流一致。
A detailed study of the subsurface thermal regime at the Upper Stillwater dam site, Uinta Mountains, northeast Utah, has been made. Temperature measurements were made in 36 drillholes located within a 1 km2area and ranging in depth from 20 to 97 m. Holes less than about 40 m deep were used only to obtain information about spatial variations in mean annual surface temperature. Several holes in or near talus slopes at the sides of the canyons have temperature minima approaching 0°C between 10 and 20 m indicating the presence of year-round ice at the base of the talus. Another set of holes show transient thermal effects of surface warming resulting from clearing of a construction site 3.5 years prior to our measurements. Most of the remaining holes show conductive behavior and have gradients ranging from 13° to 17°C km−1. Measurements made on 44 core samples yield a thermal conductivity of 5.6 (std. dev. 0.35) W m−1K−1for the Precambrian quartzite present. Surface heat flow estimates for these holes range from 70 to 100 mW m−2. However, the local disturbance of the thermal field by topography and microclimate is considerable. A finite difference method used to model these effects yielded a locally corrected Upper Stillwater heat flow of about 75 mW m−2. A final correction to account for the effects of refraction of heat from the low conductivity sedimentary rocks in the Uinta Basin into the high conductivity quartzite at the dam site, produced a regionally corrected Upper Stillwater heat flow between 60 and 65 mW m−2. This value is consistent with the observed heat flow of 60 mW m−2in the Green River Basin to the north and the Uinta Basin to the south.