R: Salt River Peak Stream Flow

Peak {extRemes} | R Documentation

## Salt River Peak Stream Flow

### Description

Peak stream flow data from 1924 through 1999 for the Salt River near Roosevelt, Arizona.

### Usage

    data(Peak)

### Format

A data frame with 75 observations on the following 2 variables.

Year

  a numeric vector giving the year.

Flow

  a numeric vector giving the peak stream flow (cfs).

Winter

  a numeric vector giving the Winter seasonal mean Darwin pressure (mb–1000).

Spring

  a numeric vector giving the Spring seasonal mean Darwin pressure (mb–1000).

Summer

  a numeric vector giving the Summer seasonal mean Darwin pressure (mb–1000).

Fall

  a numeric vector giving the Fall seasonal mean Darwin pressure (mb–1000) (see Katz et al. (2002) Sec. 5.2.2).

### Details

Peak stream flow in cfs (1 cfs=0.028317 $m^3/s$) data for water years (October through September) from 1924 through 1999 for the Salt River near Roosevelt, Arizona. Data for 1986 are missing. Also includes seasonal mean Darwin pressures (mb–1000).

Several analyses have been performed on streamflow at this location (see, e.g., Anderson and Meerschaert (1998), Dettinger and Diaz (2000); and, for extreme stream flow, Katz et al. (2002) Sec. 5.2.2).

### Source

U.S. Geological Survey (http://water.usgs.gov/nwis/peak) for Salt River peak flows. NOAA Climate Prediction Center (http://www.cpc.ncep.noaa.gov/data/indices) for seasonal mean Darwin pressures.

### References

Anderson, P. L. and Meerschaert, M. M. (1998) Modeling river flows with heavy tails. Water Resour Res, 34, (9), 2271–2280.

Dettinger, M. D. and Diaz, H. F. (2000) Global characteristics of stream flow seasonality and variability. Journal of Hydrometeorology, 1, 289–310.

Katz, R. W., Parlange, M. B. and Naveau, P. (2002) Statistics of extremes in hydrology. Advances in Water Resources, 25, 1287–1304.

### Examples

    data(Peak)
    str(Peak)
    # Fig. 9 of Katz et al. (2002) Sec. 5.2.2.
    plot(Peak[,"Year"], Peak[,"Flow"]/1000, type="l", yaxt="n",
        xlab="Water year (Oct-Sept)", ylab="Annual peak flow (thousand cfs)")
    axis(2,at=c(0,40,80,120),labels=c("0","40","80","120"))

[Package extRemes version 2.0-8 Index]