scholarly journals The Recent Sediment Record as an Indicator of Past Soil-Erosion Dynamics. Study in Dehesa Areas in the Province of Cáceres (Spain)

2019 ◽  
Vol 11 (21) ◽  
pp. 6102
Author(s):  
María Teresa de Tena Rey ◽  
Agustín Domínguez Álvarez ◽  
Lorenzo García-Moruno
Keyword(s):  
Water Erosion ◽  
Recent Sediment ◽  
Sediment Record ◽  
Early 19Th Century ◽  
Sediment Deposits ◽  
Historic Data ◽  
Sediment Model ◽  
Fine Gravel ◽  
Soil Stoniness

The work presented is a study of the recent sediment deposits in a pilot basin in dehesa areas in the province of Cáceres (Spain) through analysis of the sediment record, radiocarbon dating and correlation with historic data to assess the factors that conditioned the deposit in these areas over time. It is a qualitative study based on the important role of sediments as recorders of history, given that sediment facies and their architecture provide one of the best records of past processes and environmental factors. For the study, sediment profile surveys were used to determine the configuration and characteristics of the infill and its chronology. The sediment model of the facies studied is associated with a context of slope water erosion that led to the infill of the watercourse areas, mainly sand and fine gravel, where alterations in the normal rate were detected due to the insertion of a thicker level of materials (soil stoniness) that was able to be dated. The sediment and chronological results obtained can be used to determine the historical events in the area that could have affected the erosion and deposit processes in the basin for the estimated period, from the late 18th to the early 19th century. During this period, pastureland that maintained the ecological balance of the dehesa, with a balanced, stable displacement of soil particles, was converted to cropland, in most cases resulting in soil with a limited profile, overuse and the consequent loss of structure and texture, making it more vulnerable to erosion. Greater remobilisation would have carried thicker material to the watercourses than the material deposited as a result of limited ploughing. This study provides data for the dehesa areas studied with regard to their hydrogeomorphological dynamics, from which past environmental impacts due to tillage can be inferred.

The Risk of Water Erosion on the Foothills of the Middle High Atlas (Morocco): Tagueleft Basin Case Study : خطر التعرية المائية على السفوح بالأطلس الكبير الأوسط (المغرب): دراسة حالة حوض تاكلفت

2020 ◽  
Vol 4 (3) ◽  
Author(s):  
Rizki Mohamed
Keyword(s):  
Land Degradation ◽  
Local Development ◽  
Remote Sensing Data ◽  
Potential Method ◽  
Water Erosion ◽  
High Atlas ◽  
Negative Impacts ◽  
The Impact

The Tagueleft basin is geographically located in the northern edges of the Middle High Atlas, which is a geomorphological fragile area. The impact of human activity has accelerated water erosion in this mountains area. This is reflected in dynamic and unstable foothills, a decrease in forests density and degradation in the production of the land. On the other hand, land degradation due to human overexploitation of natural resources has increased land degradation in the area. The interest in the risk of erosion on the foothills in the area under study comes in the context of our contribution to clarify the role of geomatical and geomorphological approaches in explaining and identifying the mechanisms responsible for current foothills dynamism through water erosion and its negative impacts on the environment and local development. The aim of the study was to use the EPM (Erosion Potential Méthod) which is formulated by Slobodan Gavrilovic for erosion in mountainous areas and to test the reliability of its results based on fieldwork and remote sensing data. The results of the erosion assessment and its quantification by applying the coefficient (W) for the theoretical model in the area under study have shown that erosion is very important and it touches on wide areas as it appears through the domain classification of the distribution erosion in Tagueleft basin.

scholarly journals Colonialism on Spatial Transformation: A Socio-Spatial Analysis of the Outdoor Transitional Spaces of Sri Lankan House

2021 ◽  
Vol 12 (1) ◽  
pp. 1
Author(s):  
Deepthie Perera
Keyword(s):  
Urban Areas ◽  
Single Unit ◽  
Graphical Analysis ◽  
Sri Lankan ◽  
Spatial Transformation ◽  
Early 19Th Century ◽  
Colonial Time ◽  
Transitional Spaces ◽  
Increasing Demand

Sri Lanka, under the British from the early 19th century to 1948, saw a rapid growth in urban areas and the emergence of metropolitan bourgeoisie. Increasing demand for housing was met through housing schemes and private houses on smaller plots. Previous colonials, the Portuguese and the Dutch, adapted and continued the traditional house forms where outdoor transitional spaces such as verandas and courtyards remained as an integral part responding to climate and socio-cultural needs. However, the British period saw the advent of two noteworthy types of housing—a smaller re-adapted traditional house and an imported version of an all-enclosed house. This study evaluates the shift in socio-spatial role of the outdoor transitional spaces of single-unit houses from pre-colonial time up to independence using graphical analysis of the plan form combined with interviews on use of space.

scholarly journals Mother Behavior to Their Daughters As Seen in ''Pride and Prejudice" and "Little Women"

2019 ◽  
Vol 2 (4) ◽  
pp. 620-625
Author(s):  
Fitri Arniati ◽  
Muhammad Darwis ◽  
Nurhayati Rahman ◽  
Fathu Rahman
Keyword(s):  
19Th Century ◽  
Major Theme ◽  
The Novel ◽  
Pride And Prejudice ◽  
Late 19Th Century ◽  
Early 19Th Century ◽  
Little Women ◽  
Women's Role ◽  
The Right

This research is to study about the mother behavior to their daughters as seen in "Pride and Prejudice" and "Little Women". The mother behavior to their daughters show the different way of women as a mother in bringing up their children according to their social and condition at the time. The data were taken from two novels entitled "pride and prejudice" and "little women" is the topic of the study. The  women held in the early 19th century and the late 19th century was described as one that belonged in the home as a wife and mother, and that should marry a man who can support their family. Also throughout the novel women's role in society was described as one that is to be accomplished in household  chore and those of entertainment, such as singing  and playing music. The role of women in society was a major theme throughout the novel "Pride and Prejudice" and "Little Women" The method used in this research  is a study of comparative literature to analyze mother behavior especially for Mrs. Bennet, Lady Catherine de Bourgh, These women have similarities and different behavior in find the right mate for their daughters. This study shows that every woman has characteristics in caring for their children and paying attention to the survival of their children.

Radiometric dating of the United Kingdom SWAP sites

1990 ◽  
Vol 327 (1240) ◽  
pp. 233-238 ◽  
Keyword(s):  
Sediment Cores ◽  
Radiometric Dating ◽  
Recent Sediment ◽  
Accumulation Rates ◽  
Water Acidification ◽  
Sediment Record ◽  
The United Kingdom ◽  
Surface Water Acidification ◽  
Study Sites ◽  
Gamma Assay

Measurements of 210 Pb by direct gamma assay have been used to date sediment cores from Surface Water Acidification Project (SWAP) study sites in the U.K. The results were checked against additional dating evidence from the artificial fallout isotopes 137 Cs and 241 Am. At one of the sites, Devoke Water in Cumbria, the 137 Cs and 241 Am data were crucial in identifying a recent sediment hiatus. At sites with recently afforested catchments the sediment record indicated substantial increases in accumulation rates.

Effects of flow velocity variation on rain driven transportation and the role of rain impact in the movement of solids

Soil Research ◽  
1988 ◽  
Vol 26 (3) ◽  
pp. 443 ◽  
Author(s):  
AJ Moss
Keyword(s):  
Flow Velocity ◽  
Water Erosion ◽  
Velocity Variation ◽  
Constant Intensity ◽  
Modes Of Operation ◽  
Direct Dependence ◽  
Individual Drop ◽  
Drop Impacts

Rain-flow transportation in, and airsplash from, shallow sheet flows of varying velocity were investigated experimentally by using four drop sizes at constant intensity (64 mm h-1). Whereas airsplash yields were negligible, rain-flow transportation reached rates of up to 3 g m-1s-1 and exhibited two distinct modes of operation, or regimes, depending on whether the unimpacted flows were laminar or transitional to turbulent. In the first of these regimes, clouds of particles, suspended by individual drop impacts, were moved downstream before settling back to the bed. In the second regime, general turbulence, imposed by drop bombardment, made the flow everywhere able to entrain and transport particles without direct dependence on individual drop impacts. These findings are combined with those of previous studies to make an assessment of the roles of rain and flow in water erosion.

scholarly journals Succession and features distribution plant associations in row of railways

2016 ◽  
Vol 5 (4) ◽  
pp. 31-35
Author(s):  
Nikolay Alexandrovich Nikitin ◽  
Vera Valentinovna Solovieva
Keyword(s):  
Water Erosion ◽  
Processes Of Change ◽  
Ruderal Vegetation ◽  
Soil Lead ◽  
Erosion Processes ◽  
Plant Associations ◽  
Initial Stage ◽  
Motley Grass ◽  
Exchange Structure

ROW is a specific man-made landscape, in which the processes of change occur in its direction and intensity. Erosion processes, in particular the processes of water erosion of soil, lead not only to changes in the soil, but the plant through changes in soil fertility, nutrient richness, and by changing moisture exchange, structure and texture of soils. The main characteristics of flora undergo structural, quantitative and other changes. Vegetation characteristics, composition of plant associations, the speed and direction of succession, from the initial stage of overgrown weeds and ruderal vegetation to sustainable tree and shrub communities also modify. An ecological and geomorphological zoning shows the prevalence of the most eroded soils in the vicinity of the web. The regularity according to which in most habitats anthropogenic disturbed grow motley-grass-wheatgrass association with a reduction of anthropogenic load becomes dominant forb meadow-grass association. The role of indication of Eletrygia repens L. was also identified as an indicator of habitat disturbance.

scholarly journals Sediment record from the Kamyshovoe Lake: history of vegetation during late Pleistocene – early Holocene (Kaliningrad District, Russia)

Baltica ◽  
2015 ◽  
Vol 28 (2) ◽  
pp. 121-134 ◽  
Author(s):  
Olga Druzhinina ◽  
Dmitry Subetto ◽  
Miglė Stančikaitė ◽  
Giedrė Vaikutienė ◽  
Jury Kublitsky ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
Early Holocene ◽  
Sediment Record ◽  
Environmental Regime ◽  
Maximum Value ◽  
History Of Vegetation ◽  
Shrub Tundra ◽  
History Of ◽  
Pollen Records

Newly obtained pollen and diatom data from the Kamyshovoe Lake (germ. Dobauen, Vishtynets Highland, Baltic Uplands) controlled by radiocarbon dating allowed to reconstruct the history of local vegetation during late Pleistocene – early Holocene. Pollen records show the formation of birch-predominating forest at ca. 13.4 ka cal. BP and the flourishing of pine towards the second half of the chronozone since about 13.2 ka cal. BP. The transition to the Younger Dryas around 12.7 ka cal. BP led to the development of sparse shrub tundra with Juniperus and communities of steppe herbs. Amelioration of the environmental regime enabled birch and pine woods to spread during the second part of GS-1 event and the Preboreal. The late Preboreal time is marked by the appearance of Populus and an increase in the role of grasses in the vegetation cover, which can be correlated to similar open vegetation phases deduced from other pollen records in Europe (11.3–11.1 ka cal. BP). During the Boreal (since ca. 10.0 ka cal. BP) Corylus had its maximum value, Alnus, Tilia and Quercus appeared and spread while the birch-pine forests retreated.

scholarly journals Remote Sensing and Geographic Information System in Water Erosion Assessment

2020 ◽  
Author(s):  
Nirmal Kumar ◽  
S. K. Singh ◽  
G. P. Obi Reddy ◽  
V. N. Mishra ◽  
R. K. Bajpai
Keyword(s):  
Remote Sensing ◽  
Information System ◽  
Geographic Information System ◽  
Spatial Data ◽  
Soil Loss ◽  
Water Erosion ◽  
Geographic Information ◽  
Geographical Information ◽  
Comprehensive Overview

The aim of this review paper is to provide a comprehensive overview of geographical information system and remote sensing–based water erosion assessment. With multispectral and multi-temporal low cost data at various resolutions, remote sensing plays an important role for mapping the distribution and severity of water erosion and for modeling the risk and/or potential of soil loss. The ability of geographic information system to integrate spatial data of different types and sources makes its role unavoidable in water erosion assessment. The role of satellite data in identification of eroded lands and in providing inputs for erosion modeling has been discussed. The role of GIS in mapping eroded lands based on experts’ opinion, in generating spatial data inputs from sources other than remote sensing and in integrating the inputs to model the potential soil loss has been discussed.

scholarly journals Present-day hydro-aeolian processes in the Serra do Gerês, NW Portugal

1997 ◽  
pp. 97-109
Author(s):  
Gonçalo Teles Vieira
Keyword(s):  
Grain Size ◽  
Morphological Study ◽  
Wind Erosion ◽  
Water Erosion ◽  
Coarse Sand ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Micro Scale ◽  
Nw Portugal

Micro-scale fcatures developed in coarse sand deposits present in the higher interfluves of the Serra do Gerês are studied. Two main types of features were identified: simple lag-surfaces and microaccumulations against obstacles. A morphological typology for the later is presented. The morphological study, grain-size analysis and comparison of the aspeet and location of the micro-accumulations against obstacles with shrub anemomorphisms allowed a first genetical interpretation for the studied features. This approach emphasises the importance of water and wind erosion in the Serra do Gerês higher areas. The role of water erosion in the genesis of simple lag-surfaces and micro-accumulations against obstac1es is mainly by washing of the fines. Wind erosion acts twofolds through accumulation and deflation of fines.

Sign in / Sign up

Export Citation Format

Share Document