The Province operates a network of observation wells to provide data on ground water level fluctuations and ground water quality information on developed aquifers in British Columbia. Observation well water levels are monitored using one of four methods: 1) manually with a wetted tape, 2) continuously using Steven's chart recorders, 3) electronically with data loggers or 4) remote monitoring using cellphone technology.
Water level data from observation wells are collected on a monthly basis by field observers and forwarded to Regional Offices. Data are then checked for errors and ommissions and forwarded to the Water and Air Monitoring and Reporting Section for final checking and storage. Water level data are referenced from ground level and the month end water level reading are entered and stored in Excel to produce a month-end hydrograph. The method of measurement and accuracy of each method are given below:
|Method of measurement||Accuracy|
|Wetted Tape Method||+/- 1 mm|
|Steven's Chart Recorder||+/- 1 mm|
|Data Logger||+/- 0.1 %|
Hydrograph Analysis- Observation Well No.152
The hydrograph above shows the change in ground water level in the observation well (meters below ground level) over time. The well water level was monitored by a Steven's recorder, which monitors the ground water level fluctuations in the observation well.
This observation well was established in 1988 to monitor ground water level fluctuations in aquifer number 0297 a confined, sand and gravel aquifer in the Summerland Area. The aquifer is classified as an IIIB (11) aquifer, which is lightly developed and moderately vulnerable to contamination. Unfortunately, the observation well was accidentally destroyed by farm machinery in 1996. This observation well does not have enough data for the analysis of seasonal or long-term trends.