关于二维梯田设计质量评价指标的初步研究

Preliminary Study on the Evaluation Index of Design Quality for 2- Dimension Terrace

文献［２］提出的面积公式和本文推导的需功量公式是运用矢量法进行二维梯田设计的基本公式。确定设计质量评价指标是进行设计优化的先决条件。本文通过二维梯田设计实例，作出需功量、挖方面积、田面宽度和效功比四个量同某一表明方案特征的量之间的关系曲线；经过分析，提出用需功量或效功比作为设计质量评价指标较为合适。

The area formula gived by reference[2]and the formula of need-work quantity de-rived from this papar are basic formulae by using vector method for 2-dimension terrace design. The evaluation index of determining design quality is the precondition for optimjizing design. Thispaper presents respectively the related curves between need- work quantity,digging area,width ofterrace surface or ratio of effect and one characteristic parameter of desingn program by design exem-ple.By analysis ,the author think that the need- work quantity or the ratio of effect is more rea- sonable to be taken as the evaluation index of design quality。