Spatio–Temporal Analysis of Deformation at San Emidio Geothermal Field, Nevada, USA Between 1992 and 2010

Abstract

Although subsidence has been observed at the San Emidio geothermal field in Nevada using interferometric synthetic aperture radar since the early 1990s, the spatial extent and temporal evolution of the subsidence have not heretofore been quantified. Furthermore, the weather conditions and geographic location of San Emidio negatively affect interferometric image quality, causing low correlation amongst pairs. To address this, we introduce a new method for selecting pairs in areas of low correlation and small deformation signal using a minimum spanning tree method with a measure of image quality as the weighting criterion. We validate our pair selection approach by comparing our data products to SqueeSAR TM data products from a previous study at San Emidio. We also develop a deformation model which characterizes the spatial extent of subsidence at San Emidio in terms of volume change of the reservoir. After applying this deformation model to our data set of interferometric pairs, we examine the temporal relationship of the observed deformation with production and injection operations associated with geothermal power production.

Evaluación de las deformaciones y su pronóstico en el Turbo Generador 5, de la planta termo-energética de Nuevitas, Camagüey

“…Para el pronóstico de las deformaciones se consideraron fundamentalmente las experiencias publicadas por varios autores (Álvarez, 2018;Álvarez, Álvarez & Vázquez, 2017;Feigl et al, 2020), en el uso de modelos Arima, y luego de obtener una serie de mediciones de los desplazamientos geodésicos, como la respuesta de la deformación en el suelo o datos térmicos, hidrológicos y mecánicos registrados en la superficie terrestre. Es por ello que, para el pronóstico de las deformaciones, se consideraron los datos iniciales medidos en cada uno de los ciclos, según se muestra en la tabla 3.…”

Comparative Analysis of Single-View and Multi-View Airborne SAR Positioning Error and Course Planning for Multi-View Airborne SAR Optimal Positioning

“…Synthetic aperture radar (SAR) has the advantages of all-sky and all-weather imaging, and is an important tool for high-resolution earth observation [1][2][3]. Accurate target location is one of the important uses of SAR [4,5], and SAR image positioning is an effective means to obtain three-dimensional position information of the target, which has important application value in digital elevation model (DEM) generation of imaging area, topographic map drawing and accurate interpretation of military targets.…”