从河道自净角度谈影响河道水质净化的因素

摘要：在城市河道污染日趋严重的今天，利用河道水体自净过程的机理来解决河道水质污染问题正成为改善河道水质的一种趋势。通过对河道自净过程的分析，总结出溶解氧、水力条件、温度、微生物、河岸带在河水自净中起到了决定性的作用，并分别从上述五个方面来阐述它们在自净过程中发挥的重要性。这给改善河道水质提供了不少途径，目前许多的河道整治手段都是由此受到了启发。因此明确了在未来河流污染治理的道路上，从河道自净化规律出发去看待和治理河道水污染问题是非常必要的。

Discuss on Influencing Factors of River Water Self - purification

Since river pollution has become increasingly serious, it has become a tendency that using the stream self - purifi- cation mechanism to solve the problem of river water pollution. After the analysis of stream self - purification, five crucial factors have been concluded, which are dissolved oxygen （DO） , hydraulic condition, temperature, microorganisms and riparian zone. This paper also states their importance in self- purification. Motivated by this point, a lot of methods of river repair have arisen and ways of improving stream water quality have been supplied currently. Therefore this paper explicit shows the necessity of loo- king on and treating river water pollution at the level of river self - purification in the future river government.