Land Subsidence. The network will identify the location, rate and extent of land subsidence, which may be measured by extensometers, surveying, remote sensing technology, or any other appropriate method.
Land Subsidence. No land subsidence monitoring network exists within the Basin apart from a single University Navigation Satellite Timing & Ranging Consortium (UNAVCO) continuous GPS station in the center of the Basin. This UNAVCO station indicates that there has been little subsidence (i.e., <2 cm) in the Basin since the station was installed in 2006. DWR’s recent evaluation of land subsidence potential (DWR, 2014) ranks the Basin as having a “Medium to Low” potential for future land subsidence, noting that no documented land subsidence has occurred in the Basin but that 45% of xxxxx (17 of 38 xxxxx) with long-term groundwater elevation data (i.e. 10 years or more) had water levels at or below previous historical lows as of 2014.
Land Subsidence. The Minimum Threshold for land subsidence will be based, as applicable on: 1) the land uses and property interests that have been or are likely to be affected by land subsidence, and 2) generating maps and graphs showing the extent and rate of land subsidence in the Basin. The Minimum Threshold will be set as the rate of subsidence that substantially interferes with surface land uses and may lead to Undesirable Results.
Land Subsidence
