一、概述灌溉效益的分析计算是当前水利经济中一个急需解决并具有重要现实意义的课题。分析计算灌溉效益所依据的基本资料可以通过调查、统计和试验观测两种途径取得。用调查、统计方法,能获得比较广泛和较符合实际的资料;但针对需要解决的问题,人为地安排一些“处理”进行对比试验,不仅能直接获得灌溉增产效益等资料,还可取得灌溉经济效益计算中所需的一些重要参数,如 I. Overview The analysis and calculation of irrigation benefit is an urgent issue that needs to be solved and has important practical significance in the current water conservancy economy. The basic data used to analyze and calculate the benefits of irrigation can be obtained through surveying, statistics and experimental observations. With the help of surveys and statistical methods, more extensive and practical information can be obtained. However, some “treatments” are artificially arranged to conduct comparative tests on the problems that need to be solved, which not only directly obtains the information on irrigation yield increase but also obtains the economic benefits of irrigation Some important parameters needed in the calculation of benefits, such as