scholarly journals Glacial lakes Buni and Jezerce: Albania

2005 ◽  
Vol 85 (1) ◽  
pp. 11-18 ◽  
Author(s):  
Milovan Milivojevic ◽  
Jelena Kovacevic-Majkic
Keyword(s):  
Morphometric Characteristics ◽  
Glacial Lakes ◽  
Erosion Processes ◽  
Lake Basins

The paper presents glacial lakes and glacial relief forms at the foothill of the peak Maja Jezerce in Mt. Prokletije in Albania, near the border with Montenegro. The group of lakes Buni and Jezerce, which consists of six lakes and which genetically belongs to glacial-erosional lakes, is analyzed. Lakes are situated at the cirque bottom, between the moraines and limestone ridges. Except presented morphometric characteristics of lake basins, data about cirque are given, as well as the reconstruction of the glacier which was formed here. Recent erosion processes are intensive in this area and have considerably changed post-Pleistocene morphology of the lake, as well as the cirque bottom.

scholarly journals Morphometric Characteristics of the Aziana Valley Basin

2021 ◽  
Vol 32 (2) ◽  
pp. 163-180
Author(s):  
Heba Mohammed Fayyad ◽  
Isaac Saleh Al-Akam
Keyword(s):  
Morphometric Characteristics ◽  
Elongation Ratio ◽  
Large Area ◽  
Parallel Patterns ◽  
Erosion Processes ◽  
Drainage Patterns ◽  
Drainage Networks ◽  
Mixed Sediments ◽  
Sedimentation Processes ◽  
Made In

The present study aims at examining quantitatively the morphometric characteristics of Iziana Valley basin that is located in the northern part of Iraq; particularly in south of Erbil Governorate. This basin is considered one of the small sub-basins where its valleys run on formations of the Triple and Quadrant Ages, which are represented by the Bay Hassan formations, and the sediments and mixed sediments of the cliffs, respectively. The area of ​​the Iziana basin amounts to (36.39 km2) whereas the percentage of its rotation reaches (0.17); a low percentage, which indicates that the basin diverges from the circular to the rectangular shape. The value of the elongation ratio of the basin reaches (0.38) while the terrain ratio of the basin is (0.03), a low percentage that entails the weakness of its erosion processes and the small volume of the carried and transported sediments. As for the relative topography of the basin, it was (1.08), which is also a low value. It indicates a relatively large area of ​​the basin and the impressive strides that it has made in its erosion cycle. The total river levels of the basin reach (5) ranks, and their numbers vary from one rank to another. Moreover, the total length of the drainage networks in the basin reached (187.4 km), and the prevailing drainage patterns in the basin are the tree and parallel patterns. The researcher has adopted spatial, formal, topographical, and river net-work properties for the purpose of first determining the shape of the basin, the stage of its erosion, its secondary basins, and its terrestrial features that have been developed as a result of the contrast between the erosion and sedimentation processes. 

scholarly journals Assessment of terrain as a factor in the development of erosion processes based on GIS technologies

2020 ◽  
pp. 137-144
Author(s):  
N. A. Bondarenko ◽  
I. V. Ivanus ◽  
T. N. Kuropatkina ◽  
A. A. Zolotarev
Keyword(s):  
Extreme Values ◽  
Information Model ◽  
Overlay Analysis ◽  
Morphometric Characteristics ◽  
Gis Technologies ◽  
Erosion Processes ◽  
Multi Stage ◽  
Engineering Protection

We analyzed: 1) morphometric characteristics of the terrain: density of dissection (km/km2), depth of dissection (m/km2), General dissection of the terrain (km/km2), obtained by multi-stage processing of data from The earth's radar survey (SRTM). Overlay analysis of the following maps was performed: maps of the density of the terrain division, maps of the depth of the terrain division, and maps of the General terrain division. A geo-information model of potentially dangerous areas of origin and development of erosion processes was created based on the overlay of zones of the highest values of terrain dissection. The resulting map was created by interpreting the results of overlay operations and defining extreme values for each parameter. The graphic constructions obtained from a set of morphometric indicators will be of great applied value when planning the construction of new socio-economic objects, when developing General schemes for expanding existing settlements and designing new ones, when planning the construction of linear objects, as well as when developing measures for the engineering protection of territories, buildings and structures. Были проанализированы: 1) морфометрические характеристики рельефа: густота расчленения (км/км2), глубина расчленения (м/км2), общее расчленение рельефа (км/км2), полученные путем многоступенчатой обработки данных радиолокационной радарной съемки Земли (SRTM). Осуществлен оверлейный анализ следующих карт: карты густоты расчленения рельефа, карты глубины расчленения рельефа и карты общего расчленения рельефа. На основании наложения зон наиболее высоких значений расчлененности рельефа была создана геоинформационная модель потенциально-опасных участков зарождения и развития эрозионных процессов. Создание результирующей карты выполнялось путем интерпретации результатов оверлейных операций и определения экстремальных значений по каждому параметру. Полученные по комплексу морфометрических показателей графические построения будут иметь большое прикладное значение при планировании строительства новых социально-экономических объектов, при разработке генеральных схем расширения существующих населенных пунктов и проектировании новых, планировании строительства линейных объектов, а также при разработке мероприятий инженерной защиты территорий, зданий и сооружений.

Evaluation of Horizontal and Vertical Erosion of the Water Protection Zone of the Tsimlyansk Reservoir (a Case of Dubovsky District)

2021 ◽  
pp. 81-88
Author(s):  
Alexey E. Kosolapov ◽  
Grigory I. Skripka ◽  
Lyudmila A. Bespalova ◽  
Vadim V. Glinka ◽  
Olga V. Ivlieva ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Water Body ◽  
Field Research ◽  
Water Protection ◽  
Morphometric Characteristics ◽  
Protection Zone ◽  
Tsimlyansk Reservoir ◽  
Erosion Processes ◽  
Aerial Vehicles ◽  
Protection Area

The nature and intensity of erosion processes are an important parameter for monitoring water protection area of water body. A technique, based on field and office studies, which were carried out with the use of unmanned aerial vehicles (UAVs) (Phantom 4 Pro and Phantom 4 Advanced), was worked out and the intensity of the manifestation of erosion processes in the water protection area of the Tsimlyansk reservoir was assessed (on the example of Dubovsky district). In our research, the comparative-geographic method was used. That allowed us very accurately to identify erosional objects on the ground, and to determine their morphological and morphometric characteristics. Cameral works processed the data obtained by using UAVs. The tools of the Agisoft Metashape Professional program and the tools of the ArcGIS program were used during the work. These programs make it possible, without labor-intensive instrumental field research, to draw up orthophotoplans for gullies and determine their areas, steepness of slopes, length and width of slopes, depth of gullies, make longitudinal and transverse profiles of gullies, measure the volume of gullies and a number of other parameters. This method gives us a complete picture of the gullying network within the water protection area. In addition, a comparison of survey materials for different periods makes it possible to identify trends in the development of individual erosional forms, as well as the entire gullying network within the water protection area as a whole.

scholarly journals Shrinkage of the tarns in the High Tatras (Slovakia, Poland)

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Juraj Kapista ◽  
František Petrovič ◽  
Juraj HREŠKO ◽  
Zofia RĄCZKOWSKA
Keyword(s):  
Visual Analysis ◽  
Fine Fraction ◽  
Aerial Photographs ◽  
Glacial Lakes ◽  
Aerial Photos ◽  
Water Surface Area ◽  
Catchment Areas ◽  
Shoreline Dynamics ◽  
The High Tatras ◽  
Lake Basins

This paper assesses the shrinkage of glacial lakes in the High Tatras by analysing the series of historical and actual orthophotomaps from 1949 to 2018. The shoreline dynamics during this period were established by detailed retrospective remote sensing, and the decrease in the former surface of the water was caused by intensive interaction between morphodynamic processes and the lake basins. Herein, we have identified 38 tarns with an assumed decline in the area. This assumption was based on a comparison of initial visual analysis of the historical aerial photographs and the current orthophotomaps which capture all High Tatras tarns. We selected ten tarns with the largest or most representative changes and performed detailed cartographic analysis on them. We also attempted this analysis over shorter periods whenever possible and herein we established from 2.5 to 32.2% decrease in lake water surface area during the monitored period. This decrease in shallow lake basins was accompanied by the presence of accumulated debris flows, fine fraction fluvial-proluvial deposits, and vegetation. The shallow glacial lake basins are sensitive indicators of irreversible changes in their catchment areas and this study, therefore, highlights the effectiveness of combining detailed orthophotomaps and historical aerial photos and GIS tools in researching glacial lakes shoreline dynamics in the alpine landscape. Retrospective shoreline analysis facilitates the assessment of the effects of morphodynamic processes on the development of tarns from the postglacial period until today.

scholarly journals The development of vegetation in the English lakes, considered in relation to the general evolution of glacial lakes and rock basins

1921 ◽  
Vol 92 (647) ◽  
pp. 259-284 ◽  
Keyword(s):  
Aquatic Plants ◽  
Glacial Lakes ◽  
Life Conditions ◽  
Lake Development ◽  
The Past ◽  
Points Of View ◽  
Made In ◽  
Lake Basins

During the past seven years, 1913—20, a large number of observations have been made in the English Lakes in an attempt to obtain some knowledge of the life conditions of aquatic plants. While the immediate object was to obtain light on the factors governing the distribution of these plants, it was also hoped that the results might bear upon more general problems of aquatic biology. The considerable data thus obtained, though far from complete, seem to be of interest from both these points of view. They are also capable of a more general interpretation, which is here attempted, and which, for the sake of clearness, may be indicated at this stage. It is assumed that lakes and lake basins become modified as they increase in age. Evidence is then presented for considering the English Lakes as a series illustrating this process of lake development, and an attempt is made to describe the phases in this process, and to relate the marked differences in lake vegetation and fauna to the stages in the topographical evolution of a lake.

Size-At-Age Variability and Sexual Dimorphism of Morphometric Characteristics in the Late Ontogenesis of the Marsh Frog, Pelophylax Ridibundus (Anura, Ranidae), from Terrytory of Crimea

2019 ◽  
Vol 53 (4) ◽  
pp. 325-334
Author(s):  
V. N. Peskov ◽  
N. A. Petrenko ◽  
V. Yu. Reminnyi
Keyword(s):  
Age Groups ◽  
The Body ◽  
Adult Males ◽  
Morphometric Characteristics ◽  
Morphometric Characters ◽  
Mean Values ◽  
Marsh Frog ◽  
Males And Females ◽  
Size At Age ◽  
Linear Body

Abstract We study size-at-age and sexual variability of morphometric characteristics of the marsh frog. According to the size of the body, males were divided into three size-age groups (juvenis, subadultus, adultus), females — into four groups (juvenis, subadultus, adultus, adultus-I). We found that the chronological age of frogs (skeletochronology) does not always correspond to their biological age (size and proportions of the body). We noted that the semi-adult males are reliably larger than females by mean values of 26 studied morphometric characters. Males and females of “adultus” group do not differ by linear body size, significant differences were found in body proportions (7 characters). For the females of “adultus-I” group, the mean values of 26 characters are significantly larger than for “adultus” males. The results of our study showed that with the age of the marsh frog, the level of exhibition, directionality and structure of morphometric sex differences changes.

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