Abstract
Abstract. Houston, Texas, is one of the earliest urban areas to employ Global Positioning System (GPS) technology for land subsidence and fault monitoring. As of 2020, the University of Houston and the Harris-Galveston Subsidence District have integrated over 230 permanent GPS stations into their routine GPS data processing for regional subsidence and fault monitoring. This article summarizes the GPS geodetic infrastructure in the Greater Houston region. The infrastructure is comprised of two components: a dense GPS network (HoustonNet) and a stable regional reference frame (Houston20). Houston20 is realized by 25 long-history (>8 years) continuous GPS stations located outside the subsiding area and is aligned in origin and scale with the International GNSS Reference Frame 2014 (IGS14). The stability of the regional reference frame is below 1 mm yr−1 in all three directions. GPS-derived ground deformation rates (2010–2019) within the Greater Houston region are also presented in this article.
Highlights
For over 100 years, the city of Houston, along with the greater metropolitan region, have been impacted by land subsidence and fault movements
To prevent land subsidence that contributes to flooding and infrastructure damages, the Texas Legislature created the Harris-Galveston Subsidence District (HGSD) in 1975 and the Fort Bend Subsidence District (FBSD) in 1989 to regulate groundwater withdrawal in areas within their respective jurisdictions
This study summarized the geodetic infrastructure in the Greater Houston region
Summary
For over 100 years, the city of Houston, along with the greater metropolitan region, have been impacted by land subsidence and fault movements. To prevent land subsidence that contributes to flooding and infrastructure damages, the Texas Legislature created the Harris-Galveston Subsidence District (HGSD) in 1975 and the Fort Bend Subsidence District (FBSD) in 1989 to regulate groundwater withdrawal in areas within their respective jurisdictions. Subsequent to establishing these two subsidence districts, the Texas State Legislature established two groundwater conservation districts, Lone Star Groundwater Conservation District (LSGCD) (2001) and Brazoria County Groundwater Conservation District (BCGCD) (2005). This article aims to expound the geodetic infrastructure within the Greater Houston region as of 2020
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