scholarly journals Semi-automated recognition of planation surfaces and other flat landforms: a case study from the Aggtelek Karst, Hungary

2015 ◽  
Vol 7 (1) ◽  
Author(s):  
Michal Veselský ◽  
Peter Bandura ◽  
Libor Burian ◽  
Tatiana Harciníková ◽  
Pavel Bella
Keyword(s):  
Suitable Method ◽  
Automated Recognition ◽  
Flat Surfaces ◽  
Cave System ◽  
Landform Classification ◽  
River Terraces ◽  
River Incision ◽  
Planation Surfaces ◽  
General Method

AbstractThis study deals with the possibilities of expertdriven semi-automated recognition of planation surfaces and other flat landforms in the area of the Aggtelek Karst, Hungary. Planation surfaces are the most debatable and vague landforms and can be defined as parts of terrain formed by long-lasting erosion-denudation processes under the stagnant erosion base conditions. In terms of denudation chronology they can be considered as morphological indicators of different evolution stages of area. In karst areas planation surfaces and river terraces are mostly correlated with cave levels, which originated in relation to the same stagnant erosion base. Because there is no general method of delineation of planation surfaces, the main objective of the study was to find a suitable method for semi-automated recognition of flat landforms in the Aggtelek Karst, which should correspond to different phases of the Jósva River incision and therefore could be correlated to the multilevel cave system of the study area. Several methods for semi-automated landform classification were tested for recognition of flat surfaces in a relatively objective way. Slope gradient thresholding tool, and r.param.scale and r.geomorphon modules implemented in GRASS GIS were tested. As a result, the r.geomorphon module was proven as the most suitable method for delineation of relatively flat surfaces. Findings of the presented work can be used as a morphological indicator of the comprehensive reconstruction of evolution of the Aggtelek Karst and the Slovak Karst.

A New Method for Determining Thickness of River Incision Layers in High Mountain and Deep River Valley Areas

2015 ◽  
Vol 744-746 ◽  
pp. 407-412
Author(s):  
Ya Qun Liu ◽  
Hai Bo Li ◽  
Qi Tao Pei ◽  
Jing Sen Liu
Keyword(s):  
River Valley ◽  
New Method ◽  
High Mountain ◽  
River Terraces ◽  
River Incision ◽  
North Water ◽  
History Of ◽  
Formation And Evolution ◽  
Project Site

In high mountain and deep river valley areas, geological materials of river valley evolution are often missing or incomplete. To address this problem, tectonic movements at project site are analyzed using mathematical statistics based on the analysis of formation and evolution history of river terraces, and then a new method to determine the thickness of river incision layers is proposed. Taking Jiata dam area at the Western Route of South-to-North Water Transfer Project in China for an example, the reliability and reasonability of the proposed method are validated through a case study.

scholarly journals Relationships between karst and tectonics: case-study of the cave system north of Lake Thun (Bern, Switzerland)

1999 ◽  
Vol 12 (6) ◽  
pp. 377-387 ◽  
Author(s):  
Philipp Häuselmann ◽  
Pierre-Yves Jeannin ◽  
Thomas Bitterli
Keyword(s):  
Cave System

scholarly journals Delimiting morphological and volumetric elements of cave surveys as analogues for paleokarst reservoir modelling – A case study from the Maaras cave system, northern Greece

2021 ◽  
Vol 129 ◽  
pp. 105091
Author(s):  
Bjarte Lønøy ◽  
Christos Pennos ◽  
Jan Tveranger ◽  
Ilias Fikos ◽  
George Vargemezis ◽  
...  
Keyword(s):  
Northern Greece ◽  
Reservoir Modelling ◽  
Cave System

scholarly journals Cosmogenic burial dating of in cave-deposited alluvium: unravelling long-term incision rates and complex speleogenesis in multi-level cave systems

2020 ◽  
Author(s):  
Gilles Rixhon ◽  
Didier L. Bourlès ◽  
Régis Braucher ◽  
Alexandre Peeters ◽  
Alain Demoulin
Keyword(s):  
Early Pleistocene ◽  
Middle Pleistocene ◽  
Fluvial Terrace ◽  
Base Level ◽  
Cave System ◽  
River Incision ◽  
Order Of Magnitude ◽  
History Of ◽  
Multi Level

<p>Multi-level cave systems record the history of regional river incision in abandoned alluvium-filled phreatic passages which, mimicking fluvial terrace sequences, represent former phases of fluvial base-level stability. In this respect, cosmogenic burial dating of in cave-deposited alluvium (usually via the nuclide pair <sup>26</sup>Al/<sup>10</sup>Be) represents a suitable method to quantify the pace of long-term river incision. Here, we present a dataset of fifteen <sup>26</sup>Al/<sup>10</sup>Be burial ages measured in fluvial pebbles washed into a multi-level cave system developed in Devonian limestone of the uplifted Ardenne massif (eastern Belgium). The large and well-documented Chawresse system is located along the lower Ourthe valley (i.e. the main Ardennian tributary of the Meuse river) and spans altogether an elevation difference exceeding 120 m.</p><p>The depleted <sup>26</sup>Al/<sup>10</sup>Be ratios measured in four individual caves show two main outcomes. Firstly, computed burial ages ranging from ~0.2 to 3.3 Ma allows highlighting an acceleration by almost one order of magnitude of the incision rates during the first half of the Middle Pleistocene (from ~25 to ~160 m/Ma). Secondly, according to the relative elevation above the present-day floodplain of the sampled material in the Manants cave (<35 m), the four internally-consistent Early Pleistocene burial ages highlight an “anomalous” old speleogenesis in the framework of a gradual base-level lowering. They instead point to intra-karsting reworking of the sampled material in the topographically complex Manants cave. This in turn suggests an independent, long-lasting speleogenetic evolution of this specific cave, which differs from the <em>per descensum</em> model of speleogenesis generally acknowledged for the regional multi-level cave systems and their abandoned phreatic galleries. In addition to its classical use for inferring long-term incision rates, cosmogenic burial dating can thus contribute to better understand specific and complex speleogenetic evolution.</p>

scholarly journals A Curated Cacophony: Implementing an Intangible

2021 ◽  
Author(s):  
◽  
Oliver Wright
Keyword(s):  
Architectural Design ◽  
Flat Surfaces ◽  
The North ◽  
Architectural Element ◽  
Convex Curves ◽  
The Relationship ◽  
Effective Design ◽  
Target Design ◽  
Acoustic Measure

<p>This research investigates a progression away from acoustics formed by spaces and towards spaces that are driven by target acoustics. Despite architecture and acoustics’ shared consideration of form, materiality and inhabitation, too often acoustics is neglected from design and so is treated remedially, nullifying creativity. A case study project was undertaken to investigate the opportunities and limitations of two parametric tools, Galapagos (a generative solver) and Pachyderm (an acoustic simulation tool), to develop acoustic qualities in early architectural design. Yet, what are these acoustic qualities and how could they be measured? Testing of cafes in the Wellington CBD was undertaken to investigate these questions.  Six cafes were acoustically tested and five patrons from each of these completed a subjective survey. The café testing suggested that Reverberation Time (RT) could be an effective acoustic measure to direct architectural design. The café with the lowest patron enjoyment rating also recorded the longest RT and highest Sound Pressure Level (SPL), reinforcing the relationship between these three elements. Through these findings, patron enjoyment was concluded to be dependent on SPL and SPL was concluded to be dependent on RT (Whitlock and Dodd, 424). In order to increase patron enjoyment, Galapagos was utilised to explore possible forms that met a target design RT of 0.7 seconds. An RT of 0.7 seconds was chosen as it was shorter than the AS/NZS 2107 (2000) maximum and was comparable to the cafés with the two highest subjective enjoyment ratings.  Through a parametric and analogue design methodology, Galapagos and Pachyderm were used to investigate how acoustic goals could shape a café design. The case study project produced a design that not only meets this acoustic criterion but harnesses form to sculpt sound. Instead of applying absorption to flat surfaces, the convex curves on the north and east facades disperse sound, producing both a diffuse environment and an engaging architectural element. This integrated investigation demonstrated that a parametric and analogue design process can be implemented to create a acoustically and architecturally effective design.</p>

scholarly journals Analysis of Value Added of Salted Little Tuna in Bandung Regency, West Java, Indonesia (The Case Study in Pindang Ikan Family Business)

2021 ◽  
pp. 26-34
Author(s):  
Ayudya Primarini ◽  
Iwang Gumilar ◽  
. Junianto ◽  
Zuzy Anna
Keyword(s):  
Descriptive Analysis ◽  
Value Added ◽  
Analysis Method ◽  
Case Study Method ◽  
Tuna Fish ◽  
Quantitative Descriptive Analysis ◽  
Quantitative Descriptive ◽  
Research Show ◽  
General Method

This study aimed to analyze the value-added of salted little tuna in Bandung Regency. The general method used in this research is the case study method. The data analysis method used is quantitative descriptive analysis. And to analyze the value-added, the Hayami’s methods were used. The research conduct in Bandung regency from July to August 2021. The results of this research show that value added of salted little tuna in Bandung regency is 27% it means the price of salted little tuna increase 27% from the price of fresh little tuna fish. So, the value-added of salted little tuna is relatively still low. The strategic that used to increase the value added of salted little tuna i.e., increasing in production, increasing in price, and decreasing in costs.

scholarly journals Relief Demand Calculation in Humanitarian Logistics Using Material Classification

2020 ◽  
Vol 17 (2) ◽  
pp. 582
Author(s):  
Jianfang Shao ◽  
Changyong Liang ◽  
Xihui Wang ◽  
Xiang Wang ◽  
Liang Liang
Keyword(s):  
Disaster Response ◽  
Demand Forecasting ◽  
Humanitarian Logistics ◽  
New Method ◽  
On Demand ◽  
Material Classification ◽  
Response Practice ◽  
Different Types ◽  
General Method

Demand calculation, which is the base of most logistics decisions and activities, is a critical work in humanitarian logistics (HL). However, previous studies on demand calculation in HL mainly focus on demand forecasting methodology, with many neglecting the checklist of critical supplies and practice background. This work proposes a new method for relief demand calculation by dividing the process into two parts: supply classification and demand calculation. A general method for classifying relief supplies and clarifying the checklist of relief items for multi-disaster and multiple natural scenarios is given in detail, followed by the procedure of demand calculation for each relief material. The authors present a case study to validate the feasibility and effectiveness of the proposed method based on the disaster response practice in China. Detailed lists of relief demand for different types and severities of disaster are provided.

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