Reservoir Characterisation Using Permanent Distributed Temperature Sensing in Coal Seam Gas Development: Success and Challenges in the Surat Basin

This case study research examines informal adult learning in the Lock the Gate Alliance, a campaign against mining for coal seam gas in Central Gippsland, Australia. In the field of the campaign, circumstantial activists learn to think critically about the environment, they learn informally and incidentally, through socialization with experienced activists from and through nonformal workshops provided by the Environmental Nongovernment Organization Friends of the Earth. This article uses Bourdieu’s “theory of practice,” to explore the mobilization of activists within the Lock the Gate Alliance field and the practices which generate knowledge and facilitate adult learning. These practices have enabled a diverse movement to educate the public and citizenry about the serious threat fracking poses to the environment, to their land and water supply. The movements successful practices have won a landmark moratorium on fracking for coal seam gas in the State of Victoria.

Download Full-text

Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing

Science Advances ◽

10.1126/sciadv.abe7136 ◽

2021 ◽

Vol 7 (20) ◽

pp. eabe7136

Author(s):

Robert Law ◽

Poul Christoffersen ◽

Bryn Hubbard ◽

Samuel H. Doyle ◽

Thomas R. Chudley ◽

...

Keyword(s):

Fiber Optic ◽

Basal Layer ◽

Temperature Sensing ◽

Distributed Temperature Sensing ◽

Catchment Scale ◽

Outlet Glacier ◽

Coarse Spatial Resolution ◽

High Vertical Resolution ◽

Fast Motion ◽

Strain Heating

Measurements of ice temperature provide crucial constraints on ice viscosity and the thermodynamic processes occurring within a glacier. However, such measurements are presently limited by a small number of relatively coarse-spatial-resolution borehole records, especially for ice sheets. Here, we advance our understanding of glacier thermodynamics with an exceptionally high-vertical-resolution (~0.65 m), distributed-fiber-optic temperature-sensing profile from a 1043-m borehole drilled to the base of Sermeq Kujalleq (Store Glacier), Greenland. We report substantial but isolated strain heating within interglacial-phase ice at 208 to 242 m depth together with strongly heterogeneous ice deformation in glacial-phase ice below 889 m. We also observe a high-strain interface between glacial- and interglacial-phase ice and a 73-m-thick temperate basal layer, interpreted as locally formed and important for the glacier’s fast motion. These findings demonstrate notable spatial heterogeneity, both vertically and at the catchment scale, in the conditions facilitating the fast motion of marine-terminating glaciers in Greenland.

Download Full-text

Passive distributed temperature sensing (PDTS)-based moisture content estimation in agricultural soils under different vegetative canopies

Paddy and Water Environment ◽

10.1007/s10333-021-00839-6 ◽

2021 ◽

Author(s):

Ding-feng Cao ◽

Hong-hu Zhu ◽

Chengchao Guo ◽

Bing Wu ◽

Jiachen Wang

Keyword(s):

Moisture Content ◽

Agricultural Soils ◽

Temperature Sensing ◽

Distributed Temperature Sensing

Download Full-text

A Thermal Model for Three-Core Armored Submarine Cables Based on Distributed Temperature Sensing

Energies ◽

10.3390/en14133897 ◽

2021 ◽

Vol 14 (13) ◽

pp. 3897

Author(s):

Miguel Ángel González-Cagigal ◽

Juan Carlos del-Pino-López ◽

Alfonso Bachiller-Soler ◽

Pedro Cruz-Romero ◽

José Antonio Rosendo-Macías

Keyword(s):

Temperature Sensing ◽

The Finite Element Method ◽

Current Profile ◽

Distributed Temperature Sensing ◽

Numerical Resolution ◽

Electromagnetic Model ◽

Proposed Model ◽

Relative Errors ◽

Dynamic Loading Conditions ◽

Submarine Cables

This paper presents a procedure for the derivation of an equivalent thermal network-based model applied to three-core armored submarine cables. The heat losses of the different metallic cable parts are represented as a function of the corresponding temperatures and the conductor current, using a curve-fitting technique. The model was applied to two cables with different filler designs, supposed to be equipped with distributed temperature sensing (DTS) and the optical fiber location in the equivalent circuit was adjusted so that the conductor temperature could be accurately estimated using the sensor measurements. The accuracy of the proposed model was tested for both stationary and dynamic loading conditions, with the corresponding simulations carried out using a hybrid 2D-thermal/3D-electromagnetic model and the finite element method for the numerical resolution. Mean relative errors between 1 and 3% were obtained using an actual current profile. The presented procedure can be used by cable manufacturers or by utilities to properly evaluate the cable thermal situation.

Download Full-text