It gives an example for utilizing tracer detecting on engineering investigation on water and hydropower projects. 为示踪探测用于水利水电工程勘察提供了一个范例。
A construction control system is a very important fundamental project of large hydro projects, and crucial to construction survey. 施工控制网是大型水利水电工程的一项很重要的基础性工程，是施工测量的关键。
