waterData (version 1.0.8)

misQ05054000: Daily mean streamflow with missing values

Description

Daily mean streamflow data with randomly generated missing values.

Usage

misQ05054000

Format

A dataframe containing 4,018 observations of daily mean streamflow. There are four variables, staid, the USGS streamgage station number; val, the daily mean streamflow value in cubic feet per second; dates, the dates of the observations; and qualcode, the USGS data qualification code.

Name	Type	Description
staid	factor	USGS station identification number
val	numberic	Daily mean streamflow
dates	Date	Date of daily mean

Details

Streamflow data for USGS streamgage 05054000, Red River of the North at Fargo, North Dakota, from January 1, 2000, to December 31, 2010, were downloaded and then 2,000 of the 4,018 daily values were randomly replaced with NAs. This provides a dataset with slightly less than 50 percent of the values missing; however, the blocks of missing values are less than 30 days long. Definitions of the daily data qualification codes can be found at http://help.waterdata.usgs.gov/codes-and-parameters/daily-value-qualification-code-dv_rmk_cd (U.S. Geological Survey, 2011).

References

U.S. Geological Survey, 2011, Daily value qualification code (dv_rmk_cd): National Water Information System: Help System, accessed September 7, 2012, at http://help.waterdata.usgs.gov/codes-and-parameters/daily-value-qualification-code-dv_rmk_cd. U.S. Geological Survey, 2012, National Water Information System (NWISWeb): U.S. Geological Survey database, accessed May 2, 2012, at http://waterservices.usgs.gov/.

Examples

data(exampleWaterData)
par(las=1, tck=0.02, mar=c(5,5,4,2), mex=1.2, cex.axis=.9)
plot(misQ05054000$dates, misQ05054000$val, type="l", log="y", 
     ylab="Streamflow, in cubic feet per second", 
     xlab="", yaxs='i', xaxs='i', 
     xlim=c(as.Date("2000-01-01"), as.Date("2012-01-01")), ylim=c(10,50000), 
     yaxt="n")
axis(2, axTicks(2), format(axTicks(2), big.mark=","))
title("Red River of the North at Fargo, North Dakota")
summary(misQ05054000$val)