Map generated 10/14/2004 3:02:26 AM | |||||||||||||||||
The USGS maintains a network of wells to monitor the effects of droughts and other climate variability on ground-water levels. The network consists of a national network of about 150 wells monitored as part of the Ground Water Resources Program, supplemented by wells in some States monitored as part of the Cooperative Water Program. | |||||||||||||||||
About these Pages:
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There are three types of data available from wells measured by the USGS:
1. "periodic data", which are ground-water levels measured manually at selected intervals, usually with a steel or electric tape. These measurements typically are made from once per week to once per year. 2. "continuous data", which are ground-water levels measured by an automatic sensing device, recorded by data loggers, and retrieved periodically from the field. The availability of these data may lag current conditions by one to several months because they must be retrieved from the field, processed, and loaded into the database. 3. "real-time data", which are continuous data that are transmitted from the field to the USGS at least once per day. Barring occasional equipment malfunctions, these data reflect current ground-water conditions at the well. The Climate Response Network pages serve ground-water level data from selected wells. These pages do not serve all of the wells monitored by the USGS in each state. Additional well data from each state are available from NWISWeb, which contains data from about 800,000 wells across the United States and Puerto Rico. |
U.S. Department of the Interior, U.S. Geological Survey Maintainer: Office of Ground Water Last update: Friday, October 24, 2003 at 13:21 Privacy Statement || Disclaimer URL: http://groundwaterwatch.usgs.gov/Default.asp |