前言我国《水利水电枢纽工程等级划分及设计标准(山区、丘陵区部分)SDJl2—78(试行)》规范颁发试行已十余年。它作为国家的第二层次规范,对水利水电工程设计所作的各项基本技术规定,并作为编制第三层次规范(各种水利水电专业设计规范)的主要依据,无疑对我国水利水电建设事业的发展起了重 Preface China’s “water conservancy and hydropower hub project classification and design standards (mountains, hilly areas) SDJl2-78 (for Trial Implementation)” standardized trial has been issued more than ten years. As the second-level norms of the country, the basic technical provisions on the design of water conservancy and hydropower projects, as the main basis for the preparation of the third level of norms (all kinds of water conservancy and hydropower professional design specifications), no doubt on China’s water conservancy and hydropower construction business Developed heavy