作者继（渠首壅水建筑物的型式问题）进一步对各式起伏坝作研究．如果说前文笔者阐述了起伏坝在若干方面优于传统的固定式结构，那么本文则是从运用过的起伏坝中进行型式选优．文中从壅水、过洪和排冰等各工作情况比较了浮体问、柔腹式浮体同、橡胶拆叠坝与橡胶坝，论述了只有橡胶坝才是当今已获成功的起伏坝．文中论述了橡胶坝过冰的可能性，同时指出橡胶坝过冰所应具有的安全度问题。 The author (type of drainage structures) continue to study all kinds of relief dam. If we say that the author has described the ripple dam in many aspects better than the traditional fixed structure, then this article is from the use of the fluctuating dam type selection. In this paper, we compared the floating body, the floating belly buoyant body, the rubber disassembled dam and the rubber dam from the working conditions of water, flood and ice discharge, and discussed that only the rubber dam is the successful fluctuating dam. The paper discusses the possibility of rubber dam over ice, at the same time points out the rubber dam should have safety issues over ice.