Groundwater can be a significant freshwater source, but it is increasingly important that we use it wisely. The harmful effects of pumping too much groundwater must be minimized, and measuring subsidence plays a key role in this. The more data we have, and the more accurate that data is, the easier it is for us to maintain a necessary balance.

Measurements not only provide Harris-Galveston Subsidence District (HGSD) with data on changes in land elevation, but it also provides them with the data necessary to calibrate models allowing HGSD to “see” into the future. Through these sophisticated groundwater and subsidence models, HGSD can predict the results of future groundwater pumpage. This means HGSD can plan ahead… developing groundwater regulations that will prevent foreseeable subsidence.

Addicks Extensometer Cumulative Compaction (July 1974 - July 2018)