摘要
在许多粗粒潜水含水层中,用博尔顿或牛曼推导的解析法求出的给水度都偏小,因而不能用于水资源评价。虽然在博尔顿模型中似乎包括了潜水面以上的延迟给水,但本研究却发现,只有在饱水带中存在着垂向水力梯度才是博尔顿及牛曼模型的共同理论基础。实际上,非饱水带的延迟排水是引起降深-时间曲线发生畸变的因素,这种畸变使曲线解析的渗透系数偏大,而给水度偏小。
In the application of Boulton or Newman's analytic model to determine the specific yield incoarse-grained unconfined aquifer, the results are commonly too small to assess the ground wager resource. It seems that the delaying of drainage above the groundwater table bas been included in Bolton's model. In this paper, it is shown that only the existence of vertical hydraulic gradient in saturated zone can form thc common theoretical basis of Boulton and Newman's model. In fact, the delaying drainage in the unsaturated zone is the cause of distortion of the drawdown-time curve. This distortion makes the coefficient of permeability too large and the specific yield too small.
出处
《勘察科学技术》
1989年第5期34-38,共5页
Site Investigation Science and Technology
