前言建国以来,水利建设事业有很大的发展,但对其所产生的经济效益已进行过系统深入研究分析工作的却还不多,无论为了对已建的工程要弄清其实际所达到的各项效益指标,从而对其经济效果做出正确的评价;还是为了对将要投资的项目进行方案的抉择,均必须要求对其经济效益进行深入的研究和分析。而且,也只有这样,才能弄清其在经济效益上的价值与意义而据 Preface Since the founding of the People’s Republic of China, great achievements have been made in the cause of water conservancy construction. However, the economic benefits it has generated have not been systematically studied and analyzed in many aspects. No matter whether it is necessary to clarify the actual construction of the project Each benefit index, so as to make a correct assessment of its economic effect; or to make a decision on the project to be invested in, it must require that its economic benefits be further studied and analyzed. Moreover, the only way to understand its value in the economic benefits and significance of the data