Seasonal and Long-Term Trends in the Water Quality of Florida Bay (1989-1997)

Estuaries ◽  
1999 ◽  
Vol 22 (2) ◽  
pp. 417 ◽  
Author(s):  
Joseph N. Boyer ◽  
James W. Fourqurean ◽  
Ronald D. Jones
Keyword(s):  
Water Quality ◽  
Florida Bay ◽  
Long Term Trends

Long-term trends in water quality and influence of water recharge and climate on the water quality of brackish-water lakes: A case study of Shahu Lake

2020 ◽  
Vol 276 ◽  
pp. 111290
Author(s):  
Linfeng Tian ◽  
Xiang Zhu ◽  
Longmian Wang ◽  
Peng Du ◽  
Fuquan Peng ◽  
...  
Keyword(s):  
Water Quality ◽  
Brackish Water ◽  
Influence Of Water ◽  
Water Recharge ◽  
Long Term Trends

Some long-term trends in water quality of rivers and lakes

Eos ◽  
1970 ◽  
Vol 51 (6) ◽  
pp. 516 ◽  
Author(s):  
William C. Ackermann ◽  
Robert H. Harmeson ◽  
Robert A. Sinclair
Keyword(s):  
Water Quality ◽  
Rivers And Lakes ◽  
Long Term Trends

Long-term trends in the macrobenthos and water quality of the lower Chesapeake Bay (1985–1991)

1995 ◽  
Vol 30 (12) ◽  
pp. 840-850 ◽  
Author(s):  
Daniel M. Dauer ◽  
Raymond W. Alden
Keyword(s):  
Water Quality ◽  
Chesapeake Bay ◽  
Long Term Trends

Long-term Trends in Surface Water Quality of Five Lakes in Japan

2007 ◽  
pp. 259-266
Author(s):  
T. Yamada ◽  
T. Inoue ◽  
H. Fukuhara ◽  
O. Nakahara ◽  
T. Izuta ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
Long Term Trends

Long-term Trends in Surface Water Quality of Five Lakes in Japan

2007 ◽  
Vol 7 (1-3) ◽  
pp. 259-266 ◽  
Author(s):  
T. Yamada ◽  
T. Inoue ◽  
H. Fukuhara ◽  
O. Nakahara ◽  
T. Izuta ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
Long Term Trends

scholarly journals Water quality study of the Struma river basin, Bulgaria (1989–1998)

2003 ◽  
Vol 1 (2) ◽  
pp. 121-136 ◽  
Author(s):  
P. Simeonova ◽  
V. Simeonov ◽  
G. Andreev
Keyword(s):  
Water Quality ◽  
Region Of Interest ◽  
Seasonal Patterns ◽  
Latent Factors ◽  
Data Set ◽  
Chemical Indicators ◽  
Main River ◽  
Long Term Trends

AbstractThe present paper deals with an estimation of the water quality of the Struma river. Long-term trends, seasonal patterns and data set structures are studied by the use of statistical analysis. Nineteen sampling sites along the main river stream and different tributaries were included in the study. The sites are part of the monitoring net of the region of interest. Seventeen chemical indicators of the surface water have been measured in the period 1989–1998 in monthly intervals. It is shown that the water quality is relatively stable throughout the monitoring period, which is indicated by a lack of statistically significant trends for many of the sites and by chemical variables. Several seasonal patterns are observed at the sampling sites and four latent factors are identified as responsible for the data set structure.

scholarly journals By Slow Degrees: Two Centuries of Social Reproduction and Mobility in Britain

2007 ◽  
Vol 12 (1) ◽  
pp. 37-62 ◽  
Author(s):  
Paul Lambert ◽  
Kenneth Prandy ◽  
Wendy Bottero
Keyword(s):  
Social Mobility ◽  
Social Reproduction ◽  
Linear Trend ◽  
Time Frame ◽  
Quality Of Data ◽  
Term Change ◽  
Parental Background ◽  
Long Term Trends

This paper discusses long term trends in patterns of intergenerational social mobility in Britain. We argue that there is convincing empirical evidence of a small but steady linear trend towards increasing social mobility throughout the period 1800-2004. Our conclusions are based upon the construction and analysis of an extended micro-social dataset, which combines records from an historical genealogical study, with responses from 31 sample surveys conducted over the period 1963-2004. There has been much previous study of trends in social mobility, and little consensus on their nature. We argue that this dissension partly results from the very slow pace of change in mobility rates, which makes the time-frame of any comparison crucial, and raises important methodological questions about how long-term change in mobility is best measured. We highlight three methodological difficulties which arise when trying to draw conclusions over mobility trends - concerning the extent of controls for life course effects; the quality of data resources; and the measurement of stratification positions. After constructing a longitudinal dataset which attempts to confront these difficulties, our analyses provide robust evidence which challenges hitherto more popular, politicised claims of declining or unchanging mobility. By contrast, our findings suggest that Britain has moved, and continues to move, steadily towards increasing equality in the relationship between occupational attainment and parental background.

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