Hydrographs
Well Definitions
What do these well numbers mean?
The well numbers used in the hydrographs are categorized by owner name. For a comprehensive list of well numbers, click here.
What is a Well Zone?
In a nested monitoring well, zones represent relative depths, with the convention that Zone 1 is deeper than Zone 2, which is deeper than Zone 3, and so on. This convention is generally true for wells on this website, but is not universal. The numbering of a zone also does not represent a specific depth in feet, so Zone 1 for one well can be deeper than Zone 1 for another well.
Where can I learn more about these wells?
Our map-based Well Search Tool on our WRD GIS Hub is another useful application for finding data related to wells.
How often is the database updated?
Field data is updated on a weekly basis (approximately). Information taken by the dataloggers is updated quarterly.
Can I download the data?
Yes! After selecting your wells, you will be presented with a button to download your results as a comma-separated values (CSV) text file.
The CSV download contains all of the information in the hydrograph. The header definitions are:
WRD ID: The well ID assigned by WRD.
SN_LONG: The state well number.
OWNER NUMBER: The well name assigned by the well owner.
DATE: Date water level measurement collected.
TIME: Time water level measurement collected.
RP: Reference Point measurement taken from (top of casing, land surface, vault lid, etc).
RPE: Reference Point Elevation.
DTW: Depth to water.
GWE: Groundwater Elevation (RPE minus DTW, a.k.a. water surface elevation)
STATIC_PUMP: Water Surface representative of Static (S) water level or a Pumping (P) water level, injection well (I), or Unknown (U)
DATA_SOURCE: Agency responsible for data source.
COLLECTION_METHOD: Means of collection, usually either Transducer or water level meter (wlmeter).
NOTES: Any notes reported by the field person, such as well dry, locked - no access, well damaged, etc.
Who can I contact with questions or concerns about the data?
Please contact us using the contact information found on www.wrd.org.