CONTENTS

                                                                         Page
Preface  ................................................................. v
Abstract  ................................................................ 1
Introduction  ............................................................ 1
Development of the Hydro-Climatic Data Network .. ........................ 3
Contents of the Hydro-Climatic Data Network .............................. 8
Contents of the Hydro-Climatic Data Network Information Disk  ........... 23
Summary  ................................................................ 24
References Cited  ................ ...................................... 25



                              ILLUSTRATIONS

Figure 1a.  Hydro-Climatic Data Network (HCDN) stations from a global
               perspective.  ............................................. 9
       1b.  HCDN stations in relation to the states.  ................... 10
       1c.  HCDN stations in relation to major rivers of the conterminous
               United States (U.S.).  ................................... 11
       1d.  HCDN stations in relation to water-resources regions of the
               U.S. ..................................................... 12
       1e.  HCDN stations in relation to hydrologic units.  ............. 13
       2.   Number of water years of acceptable record at each HCDN
               station.  ................................................ 14
       3.   Number of HCDN stations by record length.  .................. 15
       4.   HCDN stations with acceptable data in selected water years.
               4a.  Water year 1900.  ................................... 16
               4b.  Water year 1930.  ................................... 16
               4c.  Water year 1950.  ................................... 16
               4d.  Water year 1988.  ................................... 16
       5.   Number of HCDN stations with appropriate data for a given
               water year.  ............................................. 17
       6.   Mean annual precipitation within the watershed at HCDN
               stations.  ............................................... 18
       7.   Size of the drainage area at each HCDN station.  ............ 20
       8.   Number of HCDN stations and total number of water years
                within categories defined by range in drainage area. .... 21



                                  TABLES

Table 1.  Description, qualifying comments and acceptable water years
               for all stations in the Hydro-Climatic Data Network (HCDN),
               listed in order of station number  ....................... 28
      2.  Summary of the identifying information for each HCDN station
               and for unacceptable Hydrologic Benchmark and National
               Water Conditions stations, in order of station number ... 131
      3.  Water years for which there is acceptable data and number of
               such years for each station in the HCDN in order of station
               number  ................................................. 151
      4.  Selected watershed characteristics for each station in the
               HCDN  ................................................... 171
      5.  Hydrologic Benchmark and National Water Conditions stations
               which were rejected for inclusion in the HCDN, with a brief
               explanation  ............................................ 191
      6.  Distribution of HCDN station information by water-resource
               regions  ................................................ 193



                                   ENCLOSURE

Hydro-Climatic Data Network Information Disk ......................  enclosed