2010
DOI: 10.1111/j.1752-1688.2010.00482.x
|View full text |Cite
|
Sign up to set email alerts
|

Weighted Regressions on Time, Discharge, and Season (WRTDS), with an Application to Chesapeake Bay River Inputs1

Abstract: A new approach to the analysis of long-term surface water-quality data is proposed and implemented. The goal of this approach is to increase the amount of information that is extracted from the types of rich water-quality datasets that now exist. The method is formulated to allow for maximum flexibility in representations of the long-term trend, seasonal components, and discharge-related components of the behavior of the water-quality variable of interest. It is designed to provide internally consistent estima… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1
1

Citation Types

4
498
0

Year Published

2014
2014
2018
2018

Publication Types

Select...
8

Relationship

1
7

Authors

Journals

citations
Cited by 428 publications
(502 citation statements)
references
References 28 publications
4
498
0
Order By: Relevance
“…We then conducted segmented regression analysis on these growing season means to detect changepoints. We also tested for long-term trends using the nonparametric Mann-Kendall trend test, which is often the preferred method of trend analysis for characteristically nonnormal and/or skewed time series datasets (Hirsch et al 1982). Sample sizes ranged from 23 to 26.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…We then conducted segmented regression analysis on these growing season means to detect changepoints. We also tested for long-term trends using the nonparametric Mann-Kendall trend test, which is often the preferred method of trend analysis for characteristically nonnormal and/or skewed time series datasets (Hirsch et al 1982). Sample sizes ranged from 23 to 26.…”
Section: Methodsmentioning
confidence: 99%
“…Daily mean TN, TP, andTSS (1978-2010) loading rates at Conowingo Dam (Fig. 1) were calculated for each month based on streamflow and water quality concentrations using the weighted regressions on time, discharge, and season (WRTDS) method (Hirsch et al 2010). Mean TN loading rates from 1945 to 1978 were estimated based on loading rates calculated for Harrisburg (Hagy et al 2004;Zhang et al 2013).…”
Section: Methodsmentioning
confidence: 99%
“…Water quality load estimation was performed using the Weighted Regressions on Time, Discharge, and Seasonality (WRTDS) [Hirsch et al, 2010]. Locally weighted scatterplot smoothing (LOESS) was used to show the long-term seasonal trend in NO 2 3 [Cleveland et al, 1992] from weekly grab samples.…”
Section: Data and Statistical Analysesmentioning
confidence: 99%
“…We calculated the suspended sediment and phosphorus loads by Weighted Regressions on Time, Discharge, and Season (WRTDS) method (Hirsch et al 2010). It uses the sample values to inform a flexible statistical model of the behavior of concentrations over the period of the record.…”
Section: Calculation Methodsmentioning
confidence: 99%