This paper recommends a method of lowering the ground water table by setting up the horizontal drains in hill slopes.
介绍在土坡中设置水平渗水管来降低地下水位的一种方法。
2
Combined with survey experience, the author probed into the methods ofsetting up ground control net with GPS and EDM lead for small hydropower projects based on the introduction of practice examples.
结合测量经验,探讨了用GPS与EDM导线建立小水电工程地面控制网的方法,并以实例加以介绍。
3
This has turned out to be a good setting for landscape shots which capture good proportions ofground and sky.