作者从事研究供、排水统筹规划的课程已有多年。对于把饮用水从山村引过来,用过的脏水排入海洋这种传统的供、排水指导思想略有所知。但是,随着人类用水量的增多,供、排水也就容易失控。对此稍一马虎大意,河流就有淤塞、干涸的危险,给鱼类的生存也将带来不利。鉴此,为保存早期河流的自然状态,除开发高级水处理技术外,还要选用判断水质好坏的最佳指标。本文既指出现存有机物指标的一些弊端,又初步探讨一下选择新指标的可能性。一、BOD与COD并非王牌一般说,许多有机物本身对生物并无毒性,相反倒是些营养。可是,当有机物 The author has been studying the supply and drainage planning for many years. The traditional supply and drainage guidelines for draining drinking water from the village and draining used filthy water into the ocean are slightly known. However, with the increase in the amount of water used by humans, supply and drainage are easily out of control. Slightly sloppy about this, the river will have the danger of silting up and drying up, which will also adversely affect the survival of the fish. In view of this, in order to preserve the natural state of the early rivers, in addition to the development of advanced water treatment technologies, the best indicators for judging the quality of water should be selected. This article not only refers to some drawbacks of the presence of organic indicators, but also explores the possibility of selecting new indicators. First, BOD and COD are not a trump. Generally speaking, many organic substances are not toxic to organisms themselves, but instead they are nutritious. However, when organic matter