The Relationship between Vegetation and Rock Lithology in the Daldynsk Region of the Yakutian ASSR from Aerial Photographs

1995 ◽  
pp. 120-123
Author(s):  
N. L. Zagrebina
Keyword(s):  
Aerial Photographs ◽  
The Relationship ◽  
Rock Lithology

scholarly journals Intensitas Serangan Hama Tikus Tanaman Padi Menggunakan Metode Pengamatan Keliling Berhubungan Linier dengan Luas Serangan Hasil Analisi Foto Udara

2019 ◽  
Vol 7 (2) ◽  
pp. 279
Author(s):  
I Ketut Satria Rahadi ◽  
I Made Anom Sutrisna Wijaya ◽  
I Wayan Tika
Keyword(s):  
Image Processing ◽  
Regression Analysis ◽  
Sampling Methods ◽  
Regression Coefficient ◽  
Aerial Photographs ◽  
Aerial Image ◽  
Crop Failure ◽  
Error Factor ◽  
The Relationship ◽  
Attack Intensity

Hama tikus adalah hama yang dapat menyebabkan kegagalan panen tanaman padi. Metode yang digunakan untuk mengukur besaran serangan hama tikus adalah metode pengambilan contoh dan pendekatan foto udara. Namun dari kedua metode ini tingkat serangan yang dihasilkan belum diketahui korelasinya. Maka dari itu dilakukannya penelitian ini untuk mendapatkan hubungan antara intensitas dan luas serangan hama tikus tanaman padi. Tahapan penelitian ini adalah survei lokasi yang terserang hama tikus, persiapan alat, pengambilan foto udara, pengambilan sampel untuk perhitungan intensitas serangan, pengolahan citra, perhitungan luas serangan, analisis regresi dan validasi. Intensitas serangan dihitung menggunakan perhitungan secara mutlak, sedangkan luas serangan dihitung menggunakan metode pengolahan citra foto udara yang dikembangkang oleh Widodo. Analisis regresi menunjukan bahwa hubungan antara intensitas serangan dengan luas serangan memiliki koefisien determinasi 0,889 dan persamaan regresi yang diperoleh y = 1,138x dengan faktor kesalahan 8,947%. Intensitas serangan hama tikus tanaman padi menggunakan metode pengambilan contoh berhubungan linier dengan luas serangan hasil analisis foto udara yang dikembangkan oleh Widodo.   Rat pests are pests that can cause crop failure in rice plant. The method used to calculate the number of rodent pest attacks is the method of sampling and obtaining aerial photographs. But from these two methods the level of attack produced is not known to correlate. So this study purpose to obtain a relationship between intensity of attack with area of attack rat pest of rice plants. The stages of this study were location surveys that were attacked by rat pests, preparation of tools, aerial photography, and sampling for the calculation of attack intensity, image processing, area attack, regression analysis and validation. The intensity of attacks is calculated using total calculations, while broad attacks are calculated using the aerial image processing method developed by Widodo. Regression analysis shows the relationship between the intensity of ??attack with the area of ??attack has a determination coefficient of 0.889 and the regression coefficient obtained y = 1.138x with an error factor of 8.947%. The intensity of rat pest attacks using linear related sampling methods with broad attack results from aerial photo analysis developed by Widodo.

scholarly journals Aplicação da Micromorfologia de Solos ao Estudo de Sedimentos Alúvio-Coluviais em Cabeceiras de Vale

2006 ◽  
Vol 33 (2) ◽  
pp. 3 ◽  
Author(s):  
GLAUCIA MARIA DOS SANTOS SILVA FERREIRA ◽  
MARCELO ACCIOLY TEIXEIRA DE OLIVEIRA
Keyword(s):  
Overland Flow ◽  
Gully Erosion ◽  
Aerial Photographs ◽  
Sedimentary Structures ◽  
Erosion Processes ◽  
Hillslope Evolution ◽  
Common Process ◽  
Geomorphological Units ◽  
The Relationship ◽  
Micromorphological Analysis

 Previous work on the role played by valley head areas in humid regions brought to light geomorphological units of the drainage net in which erosion and sedimentation would tend to be recurrent in time and space. Valley heads studied in Brazil had already proved to be very sensible to gully erosion processes, which, besides its importance to land degradation, also is a common process of hillslope evolution on humid regions. Gully erosion carries out from slopes important amounts of sediments, which may either, accumulate as proximal colluvium and alluvium or be conveyed through the drainage net. When colluvium and alluvium accumulate in proximal areas sedimentary structures may be preserved allowing the study of evolutionary processes. This paper is an attempt to apply micromorphological analysis to the study of the sedimentary structures preserved in gullied hillslopes of some southern Brazilian areas. The deposits are dated either in accordance to the supposed age of the gully incision, as estimated by aerial photographs, or by the record, in the field, of the depositional event. As a result, the age of the study deposits ranges from about 200 to 30 years, including fresh sediments just deposited one day before sampling. The paper stresses the relationship between macroscopic structures and micromorphological parametrical description, emphasizing interpretation of sedimentary structures as the result of variable overland flow rates on the gullied hillslopes.

scholarly journals The relationship between subglacial water pressure and velocity of Findelengletscher, Switzerland, during its advance and retreat

1997 ◽  
Vol 43 (144) ◽  
pp. 328-338 ◽  
Author(s):  
Almut Iken ◽  
Martin Truffe
Keyword(s):  
Water Pressure ◽  
Pressure Fluctuations ◽  
Drainage System ◽  
Surface Strain ◽  
Aerial Photographs ◽  
Surface Velocity ◽  
Surface Geometry ◽  
Sliding Speed ◽  
Pressure Surface ◽  
The Relationship

AbstractFindelengletscher, Switzerland, advanced about 250 m between 1979 and 1985, and retreated thereafter. Subglacial water pressure, surface velocity and surface strain rate were determined at several sites. The measurements were made early in the melt seasons of 1980, 1982, 1985 and 1994 and in the autumn of 1983 and the winter of 1984. Changes of surface geometry were assessed from aerial photographs.The estimated basal shear stress changed little between 1982 and 1994. Nevertheless, large changes in the relationship of subglacial water pressure and surface velocity were observed, which cannot be reconciled with the most commonly used sliding law unless it is modified substantially. Consideration of possible reasons indícales that a change in the subglacial drainage system occurred, probably involving a change in the degree of cavity interconnection. Isolated cavities damp the variations in sliding velocity that normally result from changes in water pressure, because the pressure in isolated cavities decreases as the sliding speed increases. In contrast, by transmitting water-pressure fluctuations to a larger area of the bed, interconnected cavities amplify the effect of water-pressure fluctuations on sliding speed. Thus, we suggest that an observed decrease in velocity (for a given water pressure) between 1982 and 1994 was a consequence of a decrease in the interconnectedness of the subglacial cavity system.

Climate change and other factors influencing the decline of the Tasmanian cider gum (Eucalyptus gunnii)

2008 ◽  
Vol 56 (8) ◽  
pp. 684 ◽  
Author(s):  
J. A. Calder ◽  
J. B. Kirkpatrick
Keyword(s):  
Climate Change ◽  
Climatic Change ◽  
Extinction Risk ◽  
Spatial Relationship ◽  
Good Health ◽  
Aerial Photographs ◽  
Severe Drought ◽  
Tree Decline ◽  
Factors Influencing ◽  
The Relationship

Global climatic change has been strongly implicated in the decline of many species. However, other processes can contribute towards the extinction risk of these species. Could management of these processes arrest or slow climatically related decline? We test the relationship between climate change, and other potential threatening factors, and the decline of Eucalyptus gunnii, a tree endemic to the subalpine regions of Tasmania, Australia. Through observing the spatial patterns of both climatic change and dieback, we found there was a stronger pattern of increasing droughts in the eastern part of the species range, the region which also displayed the worst dieback. A time series of aerial photographs revealed that the most severe drought periods in the last several decades have coincided with the most rapid tree decline. However, the sites that suffered the worst dieback were also more heavily used for stock grazing, a factor which had a stronger spatial relationship with tree decline than climate. Other factors were also implicated in the decline, including possum browsing. The good health of some populations in the most climatically stressed areas suggests that the amelioration of non-climatic stresses could be effective in maintaining the health of the surviving populations.

Pasture patterns and associated soil water in partially cleared woodland

1967 ◽  
Vol 15 (2) ◽  
pp. 175 ◽  
Author(s):  
R Story
Keyword(s):  
Soil Water ◽  
Aerial Photographs ◽  
Tree Roots ◽  
The Relationship

Aerial photographs of parts of the Hunter Valley show many of the trees in the centre of a circle which is paler than the surroundings. The circles have been investigated through the aerial photographs and in the field, and appear to be related to the influence of tree roots upon the grasses in certain soils in regions of fairly low rainfall. No evidence of competition for soil water could be established in the relationship.

scholarly journals TEMPORAL ANALYSIS OF SOIL OCCUPATION IN MUCURI WATERSHED BETWEEN 1989 AND 2015

2020 ◽  
Vol 28 ◽  
pp. 58-68
Author(s):  
Rafael Alvarenga Almeida ◽  
Luan Viana dos Santos ◽  
Daniel Brasil Ferreria Pinto ◽  
Caio Mário Leal Ferraz
Keyword(s):  
Land Use ◽  
Temporal Analysis ◽  
Aerial Photographs ◽  
The Social ◽  
Anthropogenic Action ◽  
Economic Reality ◽  
Remote Sensing Techniques ◽  
The Relationship ◽  
Land Use And Cover ◽  
Made In

Anthropogenic action has caused intense changes in land use and cover over the decades. Identifying and knowing these changes makes it possible to measure the impacts that can be generated as well as to identify patterns of the development of a particular region and the relationship between society and land use. Thus, it is intended to identify the changes made in the land use and occupation of the Mucuri river basin between 1989 and 2015. So, this study used remote sensing techniques and tools besides aerial photographs to map the region and to identify surface behavior. Within the Mucuri basin, the soil had been mostly occupied by classes of forest and agricultural area, consistent with the social and economic reality of the region over the last decades. The changes that have occurred indicate a reduction in water availability, growth in urban occupation and, in many cases, soil and vegetation cover deterioration.

scholarly journals Deposits’ Morphology of the 2018 Hokkaido Iburi-Tobu Earthquake Mass Movements from LiDAR & Aerial Photographs

2021 ◽  
Vol 13 (17) ◽  
pp. 3421
Author(s):  
Christopher Gomez ◽  
Norifumi Hotta
Keyword(s):  
Effective Stress ◽  
Geographical Information ◽  
Aerial Photographs ◽  
Geometrical Parameters ◽  
Mass Movements ◽  
Discrete Events ◽  
Ground Acceleration ◽  
Deep Earthquake ◽  
Seismic Mass ◽  
The Relationship

On 6 September at 03:08AM local time, a 33 km deep earthquake underneath the Iburi mountains triggered more than 7000 co-seismic mass movements within 25 km of the epicenter. Most of the mass movements occurred in complex terrain and became coalescent. However, a total of 59 mass movements occurred as discrete events and stopped on the semi-horizontal valley floor. Using this case study, the authors aimed to define planar and vertical parameters to (1) compare the geometrical parameters with rain-triggered mass movements and (2) to extend existing datasets used for hazards and disaster risk purposes. To reach these objectives, the methodology relies on LiDAR data flown in the aftermath of the earthquake as well as aerial photographs. Using a Geographical Information System (GIS), planform and vertical parameters were extracted from the DEM in order to calculate the relationship between areas and volume, between the Fahrböschung and the volume of the deposits, and to discuss the relationship between the deposit slope surface and the effective stress of the deposit. Results have shown that the relation S=k[Vd]2/3 (where S is the surface area of a deposit and Vd the volume, and k a scalar that is function of S) is k = 2.1842ln(S) − 10.167 with a R2 of 0.52, with less variability in deposits left by valley-confined processes compared to open-slope processes. The Fahrböschung for events that started as valley-confined mass-movements was Fc = −0.043ln(D) + 0.7082, with a R2 of 0.5, while for open-slope mass-movements, the Fo = −0.046ln(D) + 0.7088 with a R2 of 0.52. The “T-values”, as defined by Takahashi (2014), are displaying values as high as nine times that of the values for experimental rainfall debris-flow, signifying that the effective stress is higher than in rain-triggered counterparts, which have an increased pore pressure due to the need for further water in the material to be moving. For co-seismic debris-flows and other co-seismic mass movements it is the ground acceleration that “fluidizes” the material. The maxima found in this study are as high as 3.75.

Spatial relationships of Adélie penguin colonies: implications for assessing population changes from remote imagery

1998 ◽  
Vol 10 (4) ◽  
pp. 449-454 ◽  
Author(s):  
Eric J. Woehler ◽  
Martin J. Riddle
Keyword(s):  
Population Density ◽  
Ross Sea ◽  
Aerial Photographs ◽  
Adélie Penguin ◽  
Pygoscelis Adeliae ◽  
Data Set ◽  
Adelie Penguin ◽  
Pair Density ◽  
The Relationship ◽  
Colony Area

The relationship between colony area and population density of Adélie penguins Pygoscelis adeliae was examined to determine whether colony area, measured from aerial or satellite imagery, could be used to estimate population density, and hence detect changes in populations over time. Using maps drawn from vertical aerial photographs of Adélie penguin colonies in the Mawson region, pair density ranged between 0.1 and 3.1 pairs m−2, with a mean of 0.63 ± 0.3 pairs m−2. Colony area explained 96.4% of the variance in colony populations (range 90.4–99.6%) for 979 colonies at Mawson. Mean densities were not significantly different among the 19 islands in the region, but significant differences in mean pair density were observed among colonies in Mawson, Whitney Point (Casey, East Antarctica) and Cape Crozier (Ross Sea) populations. The relationship between colony area and population may be locality-and/or species-specific, and a robust data set is required to validate the relationship.

V. Ben Meen and the Riddle of Chubb Crater

2011 ◽  
Vol 30 (2) ◽  
pp. 240-266 ◽  
Author(s):  
Howard Plotkin ◽  
Kimberly Tait
Keyword(s):  
Impact Crater ◽  
Strong Support ◽  
Aerial Photographs ◽  
Royal Ontario Museum ◽  
Far North ◽  
Field Evidence ◽  
Historical Importance ◽  
Lunar Craters ◽  
Meteorite Crater ◽  
The Relationship

Aerial photographs of Chubb Crater, a striking 3.4 km-wide circular basin in the far north of Quebec, led the Ontario prospector Fred W. Chubb to think it might be an extinct volcano, and possibly the site of a diamond-bearing diatreme. V. Ben Meen, the Director of the Royal Ontario Museum of Geology and Mineralogy in Toronto, however, suspected it was an impact crater caused by a meteorite. Meen led two expeditions to the crater in 1950 and 1951. Despite early opposition and the initial absence of corroborative field evidence, he held on to a persistent belief in the crater's meteoritic origin. Later fieldwork ultimately provided strong evidence in support of this view. The discovery of the crater led to the development of a program at the Dominion Observatory in Ottawa to search for additional impact craters on the Canadian Shield, and the development of valuable criteria by which they could be authenticated. The craters discovered through the program fit well on the Baldwin curve relating crater depth to diameter, and lent strong support to the argument for the relationship between the meteoritic origin of lunar craters and terrestrial impact structures. Chubb Crater is of historical importance because it was the first meteorite crater to be recognized in Canada, and the first anywhere to be authenticated in the absence of associated meteorites.

Transcurrent faults in continental areas

1965 ◽  
Vol 258 (1088) ◽  
pp. 82-89 ◽  
Keyword(s):  
Gulf Of California ◽  
Continental Drift ◽  
Deep Ocean ◽  
Aerial Photographs ◽  
Continental Margins ◽  
Fault Plane Solutions ◽  
Seismic Fault ◽  
Characteristic Features ◽  
The Relationship ◽  
Transcurrent Faults

Seismic fault-plane solutions, displacements observed during historic earthquakes, and an increasing number of geological reports of active transcurrent faults in many parts of the world all suggest that transcurrent faulting is a far more important tectonic process than has usually been recognized. Characteristic features of active transcurrent faults—easily overlooked in the absence of aerial photographs—include: abundant Recent scarps that often show a scissoring relationship to one another; elongate closed depressions; consistently offset streams; and unique rift topography that is remarkably linear over distances of hundreds of kilometres. Thrusts that steepen abruptly with depth typify many transcurrent faults at the base of steep mountain fronts and have led to delays in recognition in some areas. Most puzzling of the great transcurrent fault zones are those of the circum-Pacific rim, where the relationship between major transcurrent faults of the continental margins and structures of the deep ocean floor is obscure. The Gulf of California is one region that appears transitional in that it combines many attributes of extensional rift valleys with those of transcurrent faults. Transcurrent displacements, particularly those of large magnitude, add to the attractiveness of the continental drift hypothesis, but demonstrated movements in the circum-Pacific zone are largely parallel to continental margins and thus fail to fit neatly with most theories of orogenesis and drift.

Sign in / Sign up

Export Citation Format

Share Document