当前,水工建设中的勘测工作虽已达到较高的水平,但有时在数量上和方法上进行得并不适当。例如,有时由于对岩石的某些重要特性和基础构造的特点没有研究好,因而引起设计或已开工的水利枢纽的造价增加;有时还常常 At present, although the survey work in hydraulic construction has reached a high level, it is sometimes inappropriate in terms of quantity and method. For example, the cost of designing or starting a hydro-junction has sometimes risen due to failure to study some of the key characteristics of rocks and the characteristics of the underlying structure; and sometimes also often