-
Determine of Losses Storage Tank by Geodetic Measurements
Issue:
Volume 12, Issue 5, October 2023
Pages:
116-120
Received:
29 March 2023
Accepted:
1 September 2023
Published:
14 September 2023
Abstract: It is important to fully determine the actual geometric parameters during operation and the need for their repair by a method developed based on the results of three-dimensional, ground laser scanning measurements, to avoid damage and damage, and to prevent serious economic, environmental, and social consequences. The methodology for measuring storage tanks using three-dimensional ground laser scanning technology includes requirements for reducing measurement errors, reducing the influence of external factors on the accuracy of results, and reducing work time. It includes: measure the tilt of the storage tank from the ideal position of the tool, calculate the actual geometric shape, reducing the impact of external factors on the results (metric properties of the object, instrument errors, methodological errors, instrument errors), it is possible to reduce the measurement time of checking a 25 m3 storage tank by 50-80% with the accuracy of the ground laser scanner. Various methods for determining the structure, deformation, and geometric parameters of storage tanks are based on technologies, data collection methods, measurement methods, comparison methods, and mathematical modeling methods. Microsoft Excel and Word were used to integrate research data and data, Faro Scene was used to check and process storage tank measurement data, and Trimble realworks, Tanks, and LupoScan software were used to create a three-dimensional model of the surface of the storage tank and to study changes in geometric parameters.
Abstract: It is important to fully determine the actual geometric parameters during operation and the need for their repair by a method developed based on the results of three-dimensional, ground laser scanning measurements, to avoid damage and damage, and to prevent serious economic, environmental, and social consequences. The methodology for measuring stor...
Show More
-
On the Timing and Nature of Magmatism in the North Atlantic Igneous Province: New Implications from Basaltic Rocks of the Faroe Islands
Jógvan Hansen,
Morgan Ganerød
Issue:
Volume 12, Issue 5, October 2023
Pages:
121-139
Received:
2 August 2023
Accepted:
1 September 2023
Published:
27 September 2023
Abstract: In this contribution we present novel radiometric 40Ar/39Ar ages representing a number of basaltic sills/lavas of the Faroe Islands, which themselves form part of the North Atlantic Igneous Province. Measured ages are utilised in an attempt to assess the local igneous history, where the new ages are contrasted against those of other local rocks of known ages as well as against those of comparable/neighbouring North Atlantic igneous regions. The novel ages presented in this contribution allow us to put new constraints on the timing of late stage magmatic activity and associated crustal extension of this part of the North Atlantic area. In this research we present new ages as young as ~50.5 Ma for some of the smallest Faroese sills and demonstrate that the larger and oldest local sills, grouped into the low-TiO2 Streymoy/Kvívík sills and the high-TiO2 Eysturoy/Sundini sills respectively (~55.5 Ma), likely formed immediately subsequent to the formation of the uppermost parts of the Enni Formation, which itself represent the latest stages of local surface magmatism at ~55.8 Ma. Gradually decreasing sill volumes coupled with successively younger ages point to systematic decrease of local igneous activity with increasing distances to active contemporaneous local rifting zones. Comparable scenarios recorded for other parts of the North Atlantic Igneous Province support our inferences regarding the nature of late-stage magmatic activity at some distances from zones of active seafloor-spreading. Comparisons between ages of Faroese igneous products versus those of e. g. central E Greenland point to a somewhat diachronous evolution pattern within this part of the North Atlantic Igneous Province subsequent to ~57.5 Ma. The lithosphere-asthenosphere boundary is commonly thought to be critical for the formation of basaltic magmas. Accordingly, the close spatial and temporal associations between many high-TiO2 and low-TiO2 Faroese rock suites are interpreted in the context of a regional version of this boundary.
Abstract: In this contribution we present novel radiometric 40Ar/39Ar ages representing a number of basaltic sills/lavas of the Faroe Islands, which themselves form part of the North Atlantic Igneous Province. Measured ages are utilised in an attempt to assess the local igneous history, where the new ages are contrasted against those of other local rocks of ...
Show More
-
Mathematical Downscaling of Temperature and Rainfall from the Future Projected Dataset Based on CMIP6 Model: A Case Study of Bangladesh Regarding Climate Change
Razimul Karim,
Syed Arman Akib Rahman,
Champa Rani Saha,
Mostafizur Rahman,
Shakil Ahmed,
Mahiba Musharrat
Issue:
Volume 12, Issue 5, October 2023
Pages:
140-158
Received:
17 August 2023
Accepted:
11 September 2023
Published:
27 September 2023
Abstract: The objective of this research is to assess the mathematical downscaling of the union-wise administrative area of Bangladesh that simulations and future projections of rainfall and mean temperature of CMIP6 (SSP2–4.5 and 5–8.5). Models were used to determine uncertainty with spatiotemporal variability of rainfall and mean temperature projections. Model data NETCDF file has been converted to Raster with cell size of 1, 1 decimal degree which means that each cell contains 100 km x 100 km area coverage. After preparing the dataset of 0.01, 0.01 decimal degree cell size (1km x1km), the dataset of Bangladesh has been extracted union-wise by the Bilinear resampling technique. An average value has been generated from the multiple values belonging to the specific union. After that, the dataset of Bangladesh has been generated. Mathematical downscaling and bias correction are made for the selected 16 model runs. The CMIP6 models for the model and observed values of rainfall show Kling-Gupta Efficiency (KGE) values in a range of 0.58-0.72 and for mean temperature in a range of 0.85- 0.90. The CMIP6 models show Pearson's correlation coefficient (R) in the range of 0.83-0.90 for rainfall and in a range of 0.86-0.93 for mean temperature. Also, CMIP6 models showed Nash Sutcliffe in the range of 0.06-0.78 for rainfall and 0.73-0.89 for mean temperature from the model and observed value. The projected change of future rainfall and mean temperature in the study increases the rainfall intensities due to the increment of temperature.
Abstract: The objective of this research is to assess the mathematical downscaling of the union-wise administrative area of Bangladesh that simulations and future projections of rainfall and mean temperature of CMIP6 (SSP2–4.5 and 5–8.5). Models were used to determine uncertainty with spatiotemporal variability of rainfall and mean temperature projections. M...
Show More
-
Analysis of Sedimentary Morphology and Forming Environment of Coastal Dune in Donghai Island of Zhanjiang, China
Zhongqiang Sun,
Shuangyue Lin,
Dongfeng Niu,
Longlong Liu,
Xiaochun Chen,
Jianzhi Tu,
Cheng Peng
Issue:
Volume 12, Issue 5, October 2023
Pages:
159-165
Received:
31 August 2023
Accepted:
15 September 2023
Published:
27 September 2023
Abstract: As an important environmental factor of the coastal zone, the coastal dune is influenced by land system, coastal dynamic system, monsoon, and human activities. By means of grain size analysis, particle size parameters, characterization of sedimentary structure, and characterization of distribution patterns, this study carried out research on sediment sampling, sediment granularity, quantitative characterization of sediment bedding, and sedimentary dynamic environment analysis of the coastal dunes in Donghai Island of Zhanjiang, China. The results show that there are differences in the grain composition of sediments in different parts of the coastal dunes in East Island (interdune, windward slope, dune top, and leeward slope). Cross-bedding and wavy bedding are common in the coastal dune section, the inner layers of the bedding intersect at low angles. The orientation of dune distribution is relatively consistent, with a NW - SE direction, and the orientation is between 280° and 295°. The coastal dune sediments in the study area mainly come from Longhaitian Beach, which are transported to different parts under the influence of coastal wind dynamics, and are gradually deposited under the influence of terrain, vegetation, and other factors to form the basic form of coastal dunes. The analysis of its sedimentary characteristics is helpful in revealing sediment morphology and formation environment, which is of great significance for exploring the evolution history of the coastal environment.
Abstract: As an important environmental factor of the coastal zone, the coastal dune is influenced by land system, coastal dynamic system, monsoon, and human activities. By means of grain size analysis, particle size parameters, characterization of sedimentary structure, and characterization of distribution patterns, this study carried out research on sedime...
Show More
-
Validation of MERIT DEM’s Performance as a Bare-Earth Model Using ICESat-2 Geolocated Photons
Giribabu Dandabathula,
Rohit Hari,
Jayant Sharma,
Koushik Ghosh,
Apurba Kumar Bera
Issue:
Volume 12, Issue 5, October 2023
Pages:
166-175
Received:
19 September 2023
Accepted:
8 October 2023
Published:
14 October 2023
Abstract: Digital elevation models represent the Earth's surface and play a key role in earth sciences by enabling the possibility of deriving terrain variables; the terrain variables are essential inputs for environmental modeling. The availability of open-access digital surface models has significantly advanced the understanding of earth system dynamics and also allowed researchers to generate digital terrain models, aka bare-earth models. These bare-earth models are essential data sets for applications related to hydrology and geomorphology, especially for disaster management. Under the category of open-accessible bare-earth models, Multi-Error-Removed Improved-Terrain DEM or MERIT DEM is the first kind of product unfolded by applying numerous error removal algorithms from existing DEM sources. This research reports the results after validating the MERIT DEM's performance by emphasizing its tree-height bias removal algorithm. Towards this, ground-reflected photons accrued from the ICESat-2 mission were used as reference data due to their attribution of high accuracy. Two test sites, one located in the rugged terrain of the outer Himalayas, the Lacchiwala Reserve forest, and the other, rolling hills at the Bhadra wildlife sanctuary located in the Western Ghats of the Indian sub-continent were used as test sites for validating the MERIT DEM's accuracy. The results derived after computing statistical formulae like RMSE, MAE, MBE, and profile-based visual analytics helped understand the performance of the MERIT DEM as a bare-earth model. The RMSE, MAE, and MBE for the Lachhiwala Reserve forest are 10.28 m, 7.78 m, and 0.69 m, respectively. Similarly, the RMSE, MAE, and MBE values for the Bhadra wildlife sanctuary are 4.52 m, 3.82 m, and 3.04 m, respectively. The assessment confirms that the accuracies are within the MERIT DEM's specifications and assured the successful implementation of MERIT DEM's tree-height removal algorithm since the elevations from the MERIT DEM are always lesser than the canopy height in both the test sites. Our research also investigated the reasons for the inaccuracies obtained at both the test sites and suggested using improved tree-height estimations from high-resolution canopy height data in the future version of MERIT DEM.
Abstract: Digital elevation models represent the Earth's surface and play a key role in earth sciences by enabling the possibility of deriving terrain variables; the terrain variables are essential inputs for environmental modeling. The availability of open-access digital surface models has significantly advanced the understanding of earth system dynamics an...
Show More
-
Research Article
Calcimicrobes in the Dendrolites of the Changshan Formation in the Zhi Dongyu Section
Issue:
Volume 12, Issue 5, October 2023
Pages:
176-180
Received:
28 September 2023
Accepted:
16 October 2023
Published:
30 October 2023
Abstract: Microbial carbonate rocks are classified into stromatolite, dendrolites, thrombolite, and leiolite based on their mesoscale features. Additionally, there are also oncolite and laminite. Based on field exploration sampling and combined with indoor thin section analysis, dendrolites was observed in the Changshan Formation of the Cambrian period in the Zhi Dongyu section of Shandong. It has a thickness of approximately 75 meters and, together with blocky oolitic grainstone, forms the upper part of a third-order depositional sequence that constitutes a late highstand systems tract (LHST). Macroscopically, obvious branching clots can be observed in dendrolites, while microscopically, the development of various calcifying cyanobacteria such as Girvanella, Epiphyton and Hedstroemla can be seen. In terms of Chronostratigraphy, microbial reefs dominated by dendrolites are relatively rare in the Furong Formation's Changshan Formation. Therefore, this study provides an important example for the subsequent research on dendrolites in the Changshan Formation. Additionally, the discovery of Epiphyton in the Changshan Formation contradicts the claim that they were extinct during the Late Ordovician mass extinction. What is more, the abundance of Hedstroemla also raises doubts about the previous belief that Epiphyton dominate the formation of dendrolites clots, emphasizing the importance of Hedstroemla in the formation of dendrolites clots.
Abstract: Microbial carbonate rocks are classified into stromatolite, dendrolites, thrombolite, and leiolite based on their mesoscale features. Additionally, there are also oncolite and laminite. Based on field exploration sampling and combined with indoor thin section analysis, dendrolites was observed in the Changshan Formation of the Cambrian period in th...
Show More
-
Research Article
Discussion on the Seismicity Trend of Zone in Fujian Province and Adjacent Area
Xu Zhendong,
Li Jiyu,
Cao Yi,
Fang Chuanji,
Lin Huiqin
Issue:
Volume 12, Issue 5, October 2023
Pages:
181-187
Received:
16 May 2023
Accepted:
23 October 2023
Published:
31 October 2023
Abstract: Fujian province and its adjacent area have ever happened in the history of the land in the strong earthquake, for the local people's lives and property caused a certain degree of loss. Now in Fujian coastal area is densely populated and the economy is very developed area, if more than moderate earthquake, will cause serious influence to the local people's social life. Short-term and impending earthquake predictions at present all over the world to also do not pass, but the medium and long term earthquake prediction has certain reliability. In Fujian province and its adjacent area for more than twenty-five years there was no greater than 5 magnitude. Continue to keep this quiet period? If you can to make a more accurate prediction of medium-strong earthquakes, will have a good on the local economic value and social value. If you can to make a more accurate prediction of medium-strong earthquakes, will have a good on the local economic value and social value. To earthquake trend for the future of Fujian province and its adjacent area has a more reliable prediction. This article through to the historical earthquakes in Fujian, seismic tectonic background and have a seismoscope since records began in 1971 the region seismic activity characteristics were analyzed, and at the same time using the software was used to ride the area is greater than the 1.5 -magnitude quake data through ride temporal curves is analyzed, Think: Fujian region - Lord - before an earthquake has the characteristics of the aftershock and swarm, in recent years the strain energy accumulation for effective release and then in a low, and there is in a state of stress accumulation, in Fujian province and adjacent areas should be paid attention to land the next 1-3 years have greater than 5 magnitude earthquake in May.
Abstract: Fujian province and its adjacent area have ever happened in the history of the land in the strong earthquake, for the local people's lives and property caused a certain degree of loss. Now in Fujian coastal area is densely populated and the economy is very developed area, if more than moderate earthquake, will cause serious influence to the local p...
Show More
