Trend of dissolved inorganic nitrogen at stations downstream from the Three-Gorges Dam of Yangtze River

被引：23

作者：

Sun, C. C. ^{[1
]}

Shen, Z. Y. ^{[1
]}

Xiong, M. ^{[2
]}

Ma, F. B. ^{[1
]}

Li, Y. Y. ^{[1
]}

Chen, L. ^{[1
]}

Liu, R. M. ^{[1
]}

机构：

[1] Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China

[2] Changjiang Water Resources Commiss, Bur Hydrol, Wuhan 430010, Peoples R China

来源：

ENVIRONMENTAL POLLUTION | 2013年 / 180卷

基金：

美国国家科学基金会;

关键词：

Trend; TRAMO/SEATS; HP filter; Dissolved inorganic nitrogen; Yangtze River; HODRICK-PRESCOTT FILTER; TIME-SERIES; NUTRIENT CONCENTRATIONS; CHANGJIANG RIVER; IMPACTS; NITRATE; CHINA;

D O I：

10.1016/j.envpol.2013.05.003

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The TRAMO/SEATS program, combined with the Hodrick Prescott (HP) filter, was used to detect trends and potential change points in time series of dissolved inorganic nitrogen (DIN) at three stations along the Yangtze River. The trend components were extracted, and two change points were successfully detected. The components revealed that DIN has been increasing at all the stations since the 1990s, although variations exist. Changes visible before 2002 illustrate the differences in agriculture development among regions upstream from the stations. The Three-Gorges Dam (TGD), which began to impound in 2003, led to years of different trends. The DIN concentration, which had been trending upward prior to that date, began a slightly downward trend because of NH4+ depletion. Readings at the Yichang station revealed this trend most strongly; those at the Hankou station less so. The Datong station was far enough away from the TGD so that no obvious effects were seen. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：13 / 18

页数：6

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