水文图地下水资源分割法在我国丘陵山区区域地下水资源评价中已广泛应用,取得了较好的效果。具体分割方法尽管有多种多样,然而最常用的是在河流流量过程线上找出起涨点和退落点,将两点连线以下割取部分视为地下水资源。就这一方法而言,起涨点和退落点大都是目视判断确定的,缺乏确切的客观标准,因此是一种经验性的近似分割。笔者在区域地下水资源评价工作中注意到了这一问题,本文就是对这一问题的点滴体会。水均衡原理是区域地下水资源评价的基本法则。它告诉我们,在一个完整的水文地质单 Hydrology Diagram Groundwater resource segmentation method has been widely used in the evaluation of groundwater resources in the hilly and mountainous regions in our country, and has achieved good results. Although there are a variety of specific segmentation methods, however, the most commonly used method is to find the rising point and the falling point on the river flow process line, and treat the cut part below the two points connection as groundwater resources. As far as this method is concerned, the ups and downs and the fall-off points are mostly determined by the visual judgment and lacks the exact objective criteria. Therefore, it is an empirical approximation. The author noticed this problem in the evaluation of regional groundwater resources, this article is a bit of experience on this issue. Water balance principle is the basic law of regional groundwater resources evaluation. It tells us in a complete hydro-geological list