Standard Article

Quality of Water in Storage

Water Quality Control

  1. Paulo Chaves,
  2. Toshiharu Kojiri

Published Online: 15 JUL 2005

DOI: 10.1002/047147844X.wq601

Water Encyclopedia

Water Encyclopedia

How to Cite

Chaves, P. and Kojiri, T. 2005. Quality of Water in Storage. Water Encyclopedia. 2:367–370.

Author Information

  1. Water Resources Research Center, Kyoto University, Japan

Publication History

  1. Published Online: 15 JUL 2005


In the last few decades, many of world's lakes and reservoirs used for water storage have suffered from poor water quality, mainly caused by human activities within the watersheds and inefficient operation. Although a variety of techniques exist to improve water quality in storage, most are either very costly or not sustainable. One efficient method is by taking advantage of the close relationship between quality and quantity of water to better manage stored volumes to yield optimal benefits for water use while at the same time improving its quality. This article presents the main sources of impact on the quality of water in storage and discusses the main issues related to the evaluation of water quality and water uses. Then, the relationship between quantity and quality of water in storage are explained showing the potential influence to water management. Finally, all these topics are combined within the storage management and operation framework when water quality is considered.


  • water quality in storage;
  • relation between quality and quantity of water;
  • water quality management;
  • water quality evaluation;
  • indices of water quality;
  • reservoir water quality;
  • sources of impacts to the water quality;
  • quality and uses of water;
  • water uses;
  • sources of uncertainties of water quality management;
  • eutrophication