An unsupervised two-stage clustering approach for forest structure classification based on X-band InSAR data — A case study in complex temperate forest stands

2017 ◽  
Vol 57 ◽  
pp. 36-48 ◽  
Author(s):  
Sahra Abdullahi ◽  
Mathias Schardt ◽  
Hans Pretzsch
Keyword(s):  
Forest Structure ◽  
Temperate Forest ◽  
Forest Stands ◽  
Two Stage ◽  
X Band ◽  
Clustering Approach

scholarly journals Two-Stage Geothermal Well Clustering for Oil-to-Water Conversion on Mature Oil Fields

Geosciences ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 470
Author(s):  
Josipa Hranić ◽  
Sara Raos ◽  
Eric Leoutre ◽  
Ivan Rajšl
Keyword(s):  
Spatial Arrangement ◽  
Oil Wells ◽  
Oil Field ◽  
Oil Fields ◽  
Two Stage ◽  
Oil Companies ◽  
Geothermal Potential ◽  
Clustering Approach ◽  
Water Cut

There are numerous oil fields that are approaching the end of their lifetime and that have great geothermal potential considering temperature and water cut. On the other hand, the oil industry is facing challenges due to increasingly stringent environmental regulations. An example of this is the case of France where oil extraction will be forbidden starting from the year 2035. Therefore, some oil companies are considering switching from the oil business to investing in geothermal projects conducted on existing oil wells. The proposed methodology and developed conversions present the evaluation of existing geothermal potentials for each oil field in terms of water temperature and flow rate. An additional important aspect is also the spatial distribution of existing oil wells related to the specific oil field. This paper proposes a two-stage clustering approach for grouping similar wells in terms of their temperature properties. Once grouped on a temperature basis, these clusters should be clustered once more with respect to their spatial arrangement in order to optimize the location of production facilities. The outputs regarding production quantities and economic and environmental aspects will provide insight into the optimal scenario for oil-to-water conversion. The scenarios differ in terms of produced energy and technology used. A case study has been developed where the comparison of overall fields and clustered fields is shown, together with the formed scenarios that can further determine the possible conversion of petroleum assets to a geothermal assets.

Spatio-temporal approach for identification of critical conservation areas: a case study with two pine species from a threatened temperate forest in Mexico

2019 ◽  
Vol 28 (7) ◽  
pp. 1863-1883 ◽  
Author(s):  
Agustín Molina Sánchez ◽  
Patricia Delgado ◽  
Antonio González-Rodríguez ◽  
Clementina González ◽  
A. Francisco Gómez-Tagle Rojas ◽  
...  
Keyword(s):  
Temperate Forest ◽  
Conservation Areas ◽  
Spatio Temporal ◽  
Pine Species

scholarly journals Forest biomass and wood consumption In the lower course of the Amazon: a case study of rhe Urubueua Island

1999 ◽  
Vol 29 (1) ◽  
pp. 79-79 ◽  
Author(s):  
Akio TSUCHIYA ◽  
Mario HIRAOKA
Keyword(s):  
Water Stress ◽  
Forest Structure ◽  
Forest Biomass ◽  
Human Intervention ◽  
Terra Firme ◽  
Wood Volume ◽  
The Difference ◽  
Várzea Forests ◽  
Wood Consumption

Várzea and terra-firme forests in the lower course of the Amazon were compared in terms of forest structure, wood volume increments and forest biomass. The wood volume of várzea forests was smaller than that of terra-firme forests, particularly when severe human intervention such as the cultivation of açaí palm occurred. The difference was even greater in the forest weight comparison because of the lower wood density of várzea trees. These trees are not directly influenced by water stress during the dry season, while late wood with a high density is formed in the terra-firme trees. The annual forest disappearance area due to firewood for tile factories was estimated to be about 276 ha on the island investigated, which had an area of 36,200 ha. Assuming that the forests are rotatively cultivated every 25 to 30 years, the total deforestation area is 6,870-6,948 ha in 25 years and 8,244~8,337 ha in 30 years. This result means that the balance between forest biomass and utilization is not in crisis, however, this balance might be lost as long as substitutive energy such as electricity is not supplied.

scholarly journals Effect of forest structure and health on the relative surface temperature captured by airborne thermal imagery – Case study in Norway Spruce-dominated stands in Southern Finland

2016 ◽  
Vol 32 (2) ◽  
pp. 154-165 ◽  
Author(s):  
Samuli Junttila ◽  
Mikko Vastaranta ◽  
Jarno Hämäläinen ◽  
Petri Latva-käyrä ◽  
Markus Holopainen ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Norway Spruce ◽  
Forest Structure ◽  
Thermal Imagery
Sign in / Sign up

Export Citation Format

Share Document