PROGRESS IN GEOGRAPHY ›› 2003, Vol. 22 ›› Issue (1): 38-44.doi: 10.11820/dlkxjz.2003.01.005

• Original Articles • Previous Articles     Next Articles

An Evolution of Water Quality in Guanting Reservoir During the Past Three Decades

LIANG Tao1, WANG Hao2, DING Shi ming1, XUE Jin feng1, CAI Chun xia1, ZHANG Xiu mei1   

  1. 1. Institute of geographic sciences and natural resources research,CAS, Beijing 100101;
    2. Institute of Environmental Science, Beijing Normal University, Beijing 100875
  • Received:2002-10-01 Revised:2002-11-01 Online:2003-01-25 Published:2003-01-25

Abstract: As the first large scale reservoir, Guanting Reservoir plays a key role on water supply for BeijingThe reservoir kept healthy in the first decade and water quality has deteriorated since 1972 graduallyIn the following three decades, the water body undertook series pollutions, and dropped out from the source region of drinking water in 1997 The evolution of water quality in Guanting Reservoir in the past three decades was summarized based on the previous studiesSources and characteristics of the water pollution in Guanting Reservoir were discussed by stagesAt the same time, variations of main pollutants were also discussed The results show that the evolution process of water quality in Guanting Reservoir could be roughly divided into four stagesThe feature of first stage was organic toxicants and heavy metals pollution during 1972~1975The following stage was from 1981 to 1992,in which organic pollution played a main roleThe water pollution in third stage was a kind of complex pollution, which added bacteria pollutants during 1992~1995From 1996 till now, nitrogen and phosphorous pollution were the key features in Guanting ReservoirContents of COD and main heavy metals increased slowly during the past three decades, while contents of phenol varied In addition, contents of nitrogen and phosphorous increased steadily and significantly.

Key words: Evolution of water quality, Guanting reservoir, Water pollution

CLC Number: 

  • X524