Conditioning Plant Area and Buildings

2009 ◽  
pp. 61-73
Keyword(s):  
Plant Area

scholarly journals Evaluation of pyrite and pyrrhotite in concretes

2016 ◽  
Vol 9 (3) ◽  
pp. 484-493 ◽  
Author(s):  
A. P. Marcelino ◽  
J. M. Calixto ◽  
A. G. Gumieri ◽  
M. C. Ferreira ◽  
C. L. Caldeira ◽  
...  
Keyword(s):  
Room Temperature ◽  
Iron Sulfide ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power ◽  
Rock Samples ◽  
Limit Value ◽  
Plant Area ◽  
Different Temperatures ◽  
Pyrite Content ◽  
One Year

ABSTRACT It is well known that aggregate characteristics can intensively interfere in concrete behavior especially when sulfides are presented in the aggregates. The lack of consensus to content limit value of these deleterious sulfur compounds in concrete structures for dams has motivated several investigations worldwide. Within this scenario, this work presents a methodology to evaluate the presence of pyrite and pyrrhotite in concretes produced with aggregates containing sulfides. For the study, rock samples from the Irapé hydroelectric power plant area in Minas Gerais (Brazil) were used. This plant was built in a geological site where the rock presented sulfide levels of at least 3%. These rock samples were first ground and then used as aggregates in mortars, which were, during almost one year, subjected to three different exposed conditions: temperature of 23° ± 2°C and relative humidity of 95 to 100%; calcium hydroxide solution diluted in water kept at two different temperatures: room temperature and 50° C. The presence and amount of pyrrhotite were obtained from a leaching process of the material (aggregate or mortar) in a solution of hydrochloric acid. This procedure allowed also the evaluation of the pyrite content. The results showed that the amount of pyrite has remained virtually constant over time in the three exposure situations. This finding indicates that sulfur limits in aggregates should be set according to the type of iron sulfide presented and not solely by the total amount of sulfur.

A new approach to calculate Plant Area Density (PAD) using 3D ground-based lidar

2016 ◽  
Author(s):  
Leila Taheriazad ◽  
Hamid Moghadas ◽  
Arturo Sanchez-Azofeifa
Keyword(s):  
New Approach ◽  
Area Density ◽  
Plant Area ◽  
Ground Based Lidar

scholarly journals KAJIAN KESESUAIAN LAHAN BUDIDAYA TANAMAN OBAT DENGAN APLIKASI SISTEM INFORMASI GEOGRAFIS (SIG) DI KAWASAN SUKU SAMBORI KABUPATEN BIMA

2018 ◽  
Vol 1 (3) ◽  
pp. 110
Author(s):  
Juna Idin ◽  
Sugeng Utaya ◽  
I Komang Astina ◽  
Budi Handoyo
Keyword(s):  
Medicinal Plant ◽  
Local Area ◽  
Geographical Information ◽  
Survey Method ◽  
Plant Cultivation ◽  
Gis Data ◽  
Assessment Approach ◽  
Plant Area ◽  
Medicinal Plant Cultivation ◽  
Collection Methods

This research can provide the answer that the potential of the local area is quite potential and needs to be utilized wisely for the welfare of the community. The purpose of this research is to know the potential of medicinal plant cultivation land and to obtain data base on the suitability of medicinal plant cultivation area with application of Geographical Information System (GIS) as a medicinal plant area in Sambore Tribe Area. In this research using survey method with MLA (Multidiciplinaire Landscape Assessment) approach is a method to determine "what resources are most important to society. The research instruments that we present are tools used in research processes such as GPS, benchmarking, thermometer, geological compass, stpowatch, sechi disk, salinometer, and GIS data analysis software and supported by data collection methods that are observation, documentation and experimental methods so this research can be done well

scholarly journals Electromagnetic Induction Is a Fast and Non-Destructive Approach to Estimate the Influence of Subsurface Heterogeneity on Forest Canopy Structure

Water ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3218
Author(s):  
Simon Damien Carrière ◽  
Nicolas K. Martin-StPaul ◽  
Claude Doussan ◽  
François Courbet ◽  
Hendrik Davi ◽  
...  
Keyword(s):  
Forest Structure ◽  
Electromagnetic Induction ◽  
Forest Canopy ◽  
Soil Depth ◽  
Soil Conditions ◽  
Mediterranean Forests ◽  
Area Index ◽  
Edaphic Conditions ◽  
Plant Area Index ◽  
Plant Area

The spatial forest structure that drives the functioning of these ecosystems and their response to global change is closely linked to edaphic conditions. However, the latter properties are particularly difficult to characterize in forest areas developed on karst, where soil is highly rocky and heterogeneous. In this work, we investigated whether geophysics, and more specifically electromagnetic induction (EMI), can provide a better understanding of forest structure. We use EMI (EM31, Geonics Limited, Ontario, Canada) to study the spatial variability of ground properties in two different Mediterranean forests. A naturally post-fire regenerated forest composed of Aleppo pines and Holm oaks and a monospecific plantation of Altlas cedar. To better interpret EMI results, we used electrical resistivity tomography (ERT), soil depth surveys, and field observations. Vegetation was also characterized using hemispherical photographs that allowed to calculate plant area index (PAI). Our results show that the variability of ground properties contribute to explaining the variability in the vegetation cover development (plant area index). Vegetation density is higher in areas where the soil is deeper. We showed a significant correlation between edaphic conditions and tree development in the naturally regenerated forest, but this relationship is clearly weaker in the cedar plantation. We hypothesized that regular planting after subsoiling, as well as sylvicultural practices (thinning and pruning) influenced the expected relationship between vegetation structure and soil conditions measured by EMI. This work opens up new research avenues to better understand the interplay between soil and subsoil variability and forest response to climate change.

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