Peak                package:extRemes                R Documentation

_S_a_l_t _R_i_v_e_r _p_e_a_k _s_t_r_e_a_m _f_l_o_w.

_D_e_s_c_r_i_p_t_i_o_n:

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

_U_s_a_g_e:

     data(Peak)

_F_o_r_m_a_t:

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

     _Y_e_a_r a numeric vector giving the year.

     _F_l_o_w a numeric vector giving the peak stream flow (cfs).

     _W_i_n_t_e_r a numeric vector giving the Winter seasonal mean Darwin
          pressure (mb-1000).

     _S_p_r_i_n_g a numeric vector giving the Spring seasonal mean Darwin
          pressure (mb-1000).

     _S_u_m_m_e_r a numeric vector giving the Summer seasonal mean Darwin
          pressure (mb-1000).

     _F_a_l_l a numeric vector giving the Fall seasonal mean Darwin
          pressure (mb-1000) (see Katz et al. (2002) Sec. 5.2.2).

_D_e_t_a_i_l_s:

     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).

_S_o_u_r_c_e:

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

_R_e_f_e_r_e_n_c_e_s:

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

     Dettinger, M.D. and Diaz, H.F. Global characteristics of stream
     flow seasonality and variability. J. Hydrometeorol (1):289-310,
     2000.

     Katz, Richard W., Parlange, Marc B. and Naveau, Philippe.
     Statistics of extremes in hydrology. Advances in Water Resources,
     (25):1287-1304, 2002.

_E_x_a_m_p_l_e_s:

     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"))

