Spectrum characteristics of major ion concentrations at wuhan sectoin of the changjiang river

被引：0

作者：

Xia X.-H. ^{[1
,2
]}

Chen J.-S. ^{[3
]}

Cai X.-Y. ^{[4
]}

机构：

[1] Institute of Environmental Sciences, Beijing Normal University, State Key Joint Laboratory of Environmental Simulation and Pollution Control

[2] Department of Urban and Environmental Science, Peking University

[3] Geography Department, Graduate School of University of Science and Technique of China

来源：

Chinese Geographical Science | 2001年 / 11卷 / 4期

关键词：

Major ions; Spectrum characteristic of water quality; The changjiang river; Water quality change;

D O I：

10.1007/s11769-001-0046-9

中图分类号：

学科分类号：

摘要：

Spectrum analyses of water quality time series have been carried out for five hydrometric stations including Wuhan hydrometric station of the Changjiang(Yangtze) River, etc. The fluctuations of Ca2+, Mg 2+ and HCO-3, concentra-tions in river water under different physical geography conditions have about two-year cycle which is corresponding to hydrometeorological quasi-biannual-oscillation(QBO) . Na +, C1-, SO2-4 have about two-year cycle in the area lightly affected by human activities while two-year cycle doesn't exist in the area heavily affected by human activities. All the fluctuations of major ions have about three-month cycle. The river discharge fluctuation accounts for 43. 9% , 45.1%, 54.3%, 33.9%, 30.3% and 42. 7% of the variance of Ca2+, Mg2+.HCO-3, Na+, Cl-, SO2-4, respective-ly, at Wuhan from 1962 to 1985. According to the spectrum characteristic of major ions, the duration of the time series has to be at least 13 years for trend analysis of monthly water quality data.

引用

页码：315 / 320

页数：5

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