“二暗一明”农田灌排模式经济后评价

Secondary Economical Evaluation of Farmland Irrigation and Drainage Mode with “Two Kinds of Closed Conduits and One Kind of Open Ditches”

以锡山市张泾镇泾北村的“二暗一明”灌排工程为例 ,探讨了该类工程经济后评价方法。评价结果表明 ,“二暗一明”农田灌排模式在经济上是合理的 ,从而为进一步推广该模式提供了理论依据 ,同时也指出了该模式存在的问题 。

Taking an irrigation and drainage project with “two kinds of closed conduits and one kind of open ditches” in Xishan City for example, the secondary economical evaluation method for this mode projects is discussed. The evaluation results show that the farmland irrigation and drainage mode with “two kinds of closed conduits and one kind of open ditches” is reasonable economically. Therefore, the theoretical basis for further spreading this mode is provided. In the meantime, some problems existing in this mode are pointed out also. Finally some suggestions are proposed.