解决潜水蒸发问题的阿维里扬诺夫经验公式在地下水数值模型中的应用——以格尔木河流域为例

The Application of Aviriyanover's Empirical Formula for Solving the Phreatic Water Evaporation Problem to Groundwater Numerical Modeling——A Case Study of the Golmud River Watershed

数值模型对地下水流和溶质运移等问题进行模拟的方法以其有效性、灵活性和相对廉价性逐渐成为地下水研究领域的一种不可缺少的重要方法。在地下水浅埋区,蒸发是地下水的主要排泄方式之一,而地下水埋深是影响蒸发度的敏感因子,因此,数值模型中对地下水埋深的拟合精度,将直接影响地下水数值模拟模型的精度。本文以格尔木河流域为例,通过阿维里扬诺夫经验公式的线性与非线性模型的计算结果对比,来说明如何利用蒸发的数学模型提高模拟精度。

Numerical modeling, as a simulation method for such problems as groundwater flow and solute transport, has gradually become an important and indispensable method with its effectiveness, flexibility and relatively low cost. Evaporation is one of the main drainage modes of groundwater in the shallow-buried groundwater area, and the groundwater burial depth is a sensitive factor affecting the evaporation degree. Therefore, the fitting accuracy of groundwater depth in the numerical modeling will have a direct effect on the precision of a groundwater simu- lation model. This paper, based on a comparison of the results between the linear and nonlinear models Aviriyanover empirical formula, and taking the Golmud River watershed as an example, demonstrates how to enhance the simulation precisionbY using the evaporation mathematical model.