水文地质勘探中抽水试验是一项重要的任务;它的精确与否直接影响水文地质调查的质量。 一、木箱三角堰法。 a.三角堰的制作方法:取一个宽≥4H深≥2.5H的肥皂箱并在其纵端切一90°角的切口,然后钉上90°角切口的铁皮和尺子即成,尺子的零刻度与三角堰的直角二边交点平,尺子距三角堰的边为3—6H.(如图一) The pumping test in hydrogeological exploration is an important task; its accuracy or not has a direct impact on the quality of the hydrogeological survey. First, the wooden box weir method. a. Preparation of the triangular weir: Take a soap box of width≥4H depth≥2.5H and cut an incision of 90 ° at its longitudinal end, and then make a 90 ° incision of the iron sheet and the ruler, the zero of the ruler Scale and triangle weir at right angles to the intersection of two flat, ruler from the triangular weir side is 3-6 H. (Figure 1)