HYDROLOGIC DATA

Information

Source

Obtainable

Comments

Water Publications

This book lists state

The trend for the past decade has been to

of State Agencies,

agencies involved with

compile such basic data in computerized data

Giefer and Todd

research related to water

banks, and a number of such information

(1972, 1976)

and also lists all

systems are now available for private and

publications of these

public users.

Many data now collected by

agencies.

Federal and state water related agencies are

available through computer files, but most

In general, hydrologic

data collected by private consultants, local

data can be classified

and county agencies, and well drilling

into four primary

contractors remain with the organization

categories:

stream

that gathered them.

discharge, stream water

quality, groundwater

level, and groundwater

quality.

Local Assistance

NAWDEX identifies

NAWDEX, which began operation in 1976 and is

Center of the

organizations that collect

administered by the U.S. Geological Survey

National Water Data

water data, offices within

consists of a computer directory system

Exchange (NAWDEX)

these organizations from

which locates sources of needed water data.

U.S. Geological

which the data may be

The system helps to link data users to data

Survey

obtained, alternate

collectors.

For example, the NAWDEX Master

421 National Ctr.

sources from which an

Water Data Index can identify the sites at

Reston, VA 22092

organization's data may be

which water data are available in a

(703) 648 5663

obtained, the geographic

geographic area, and the Water Data Sources

areas in which an

Directory can then identify the names and

organization collects

addresses of organizations from which the

data, and the types of

data may be obtained.

In addition, listings

data collected.

and summary counts of data, references to

Information has been

other water data systems, and bibliographic

compiled for more than

data services are available.

1,700 organizations, and

information on other

organizations is added

continually.

More than

450,000 data collection

sites are indexed.

WATSTORE

WATSTORE maintains the

Data can be retrieved in machine readable

Branch of Computer

storage of:

1) surface 

form or as computer printed tables or

Technology

water, quality of water,

graphs, statistical analyses, and digital

USGS

and ground water data

plots.

To retrieve WATSTORE data, contact:

Reston, VA 22092

measured on a daily or a

(703) 648 5686

continuous basis; 2)

National Water Data Exchange (NAWDEX)

annual peak values of

Branch of Computer Technology

stream flow stations; 3)

USGS

chemical analyses for

Mail Stop 421

surface  and ground water

Reston, VA 22092

sites; 4) water data

(703) 648 5664

parameters measured more

frequently than daily; 5)

geologic and inventory

data for ground water

sites; and 6) summary data

on water use.

A4 13

November 1992