一、引言在盆地中近地表的热系统受到地下水流动的很大影响,Smith和Chapman最近研究了地下水流动对近地表热系统扰动的强度和空间特征,他们的二维模型结果表明:热系统从以传导为主到以平流为主的转变是明显的,且主要依赖于潜水面的坡度;岩石渗透率的大小和空间分布;非理想流体液压的各向异性;以及流体流动深度等因素,地表热流相对于背景热流值 I. INTRODUCTION Near-surface thermal systems in the basin are strongly influenced by groundwater flow. Smith and Chapman recently studied the intensity and spatial characteristics of ground-water flow perturbations on near-surface thermal systems. Their two-dimensional model results show that the thermal system The transition from predominantly convective to mainly advection is obvious, and depends mainly on the slope of the submerged surface; the size and spatial distribution of rock permeability; the anisotropy of non-ideal fluid hydraulic pressure; and the depth of fluid flow, Heat flow relative to the background heat flow value