Ferguson Grant, Woodbury Allan D
Department of Earth Sciences, St. Francis Xavier University, Nova Scotia, Canada.
Ground Water. 2005 Nov-Dec;43(6):837-42. doi: 10.1111/j.1745-6584.2005.00088.x.
Using heat as a tracer allows for estimation of ground water recharge rates based on subsurface temperature measurements. While possible in theory, it may be difficult in practice to discriminate the effects of climate from the effects of ground water advection. This study uses synthetic simulations to determine the influence of variability of ground surface temperature (GST) on the ability to estimate vertical specific discharge from temperature profiles. Results suggest that in cases where temperature measurements are sufficiently deep and specific discharge is sufficiently high, estimates of specific discharges will be reasonably accurate. Increasing the number of times temperatures are measured, or producing models that incorporate variations in GST, will increase the reliability of any studies using temperatures to estimate specific discharge. Furthermore, inversions of temperature measurements should be combined with other methods of estimating recharge rates to improve the reliability of recharge estimates.
利用热作为示踪剂，可以根据地下温度测量来估算地下水补给率。虽然理论上可行，但在实践中可能难以区分气候影响与地下水平流影响。本研究使用合成模拟来确定地表温度（GST）变异性对从温度剖面估算垂直比流量能力的影响。结果表明，在温度测量足够深且比流量足够高的情况下，比流量估计将相当准确。增加温度测量次数，或生成纳入GST变化的模型，将提高任何使用温度估算比流量的研究的可靠性。此外，温度测量反演应与其他估算补给率的方法相结合，以提高补给估算的可靠性。
