scholarly journals SISTEMATIZAÇÃO DE UMA EXPERIÊNCIA AGROECOLÓGICA NO CERRADO BRASILEIRO: SUBSÍDIOS PARA O PLANEJAMENTO DE UNIDADES PRODUTIVAS DE BASES ECOLÓGICAS

Nativa ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 573-581
Author(s):  
Isabel Corrêa Fontes Chagas de Oliveira ◽  
Renato Linhares De Assis ◽  
Adriana Maria de Aquino
Keyword(s):  
Satellite Images ◽  
Social Economic ◽  
Google Earth ◽  
Aerial Photographs ◽  
Construction Process ◽  
Brazilian Cerrado ◽  
Way Of Life ◽  
Complex Dynamic ◽  
Field Surveys ◽  
Midwest Region

Este estudo consiste na sistematização de uma experiência agroecológica a partir do ordenamento e síntese dos processos do seu uso e ocupação. A experiência iniciou em 1984, em unidade agroecológica pioneira, com características neorurais, na região Centro-oeste do Brasil. A pesquisa contou com entrevistas não estruturadas, levantamento de campo, pesquisa bibliográfica e documental (fotografias, revistas, jornais, imagens de satélite e fotografias aéreas). Utilizou-se a ferramenta Google Earth para avaliar o mosaico de agroecossistemas resultante da ação agroecológica no espaço e tempo. Os resultados apontaram uma dinâmica complexa do processo de construção de agroecossistemas e redes sociais, configurando-se num desenho agroecológico que ultrapassa as fronteiras físicas da propriedade. O processo de síntese e análise relatado, além de empoderar os protagonistas, traz a luz do conhecimento científico aprendizados de uma experiência empírica de um modo de vida integrado à natureza, com riqueza em variedade, diversidade e possibilidades nos processos biológicos, sociais, econômicos, éticos, morais e culturais, que pode inspirar e subsidiar outras iniciativas de base agroecológica. Palavras-chave: neoruralidade; gerenciamento agroecológico; redesenho da paisagem; agroecossistemas.   Systematization of an agroecological experience in the Brazilian Cerrado: subsidies for the planning of productive units of ecological bases   ABSTRACT: This study consists of the systematization of an agroecological experience from the ordering and synthesis of the processes of its use and occupation. The experience began in 1984, in a pioneering agroecological unit, with neorural characteristics, in the Midwest region of Brazil. The research included unstructured interviews, field surveys, bibliographic and documentary research (photographs, magazines, newspapers, satellite images, and aerial photographs). The Google Earth tool was used to evaluate the mosaic of agroecosystems resulting from agroecological action in space and time. The results pointed toward a complex dynamic of the construction process of agroecosystems and social networks, configuring itself in an agroecological design that goes beyond the physical boundaries of the property. The reported process of synthesis and analysis, in addition to empowering the protagonists, brings to light scientific knowledge learning from an empirical experience of a way of life integrated with nature, with a wealth of variety, diversity, and possibilities in biological, social, economic, ethical, moral and cultural processes, which can inspire and subsidize other agroecological initiatives. Keywords: neorurality; agroecological management; landscape redesign; agroecosystems.

scholarly journals Analysis of the volume of silted sediments and the urbanization rate in urban river basins; a case study of the Mãe d’Água Reservoir

2020 ◽  
Vol 24 ◽  
pp. e26
Author(s):  
Felippe Fernandes ◽  
Cristiano Poleto
Keyword(s):  
Field Data ◽  
Satellite Images ◽  
River Basins ◽  
Google Earth ◽  
Aerial Photographs ◽  
Rio Grande Do Sul ◽  
Environmental Liabilities ◽  
Diffuse Sources ◽  
Urbanization Rate

The Mãe d`Água reservoir is the mouth of four streams, corresponding to an area of 352 ha and is located in the Vale Campus of the Federal University of Rio Grande do Sul. The study area is currently predominantly characterized by a residential occupation, with environmental liabilities coming from diffuse sources. The application of the methodology for computational modeling in the Mãe d'Água reservoir, inferring about the useful volume of the project in 1962, useful volume in 2014, and the silting volume was developed with the aid of the following software: AutoCAD 2018, AutoCAD Civil 3D 2018, and Google Earth which specialize in the field of geoprocessing and guidelines for the calculations that use as base the data regarding the survey and processing of field data. Two types of remote sensing products were used to evaluate the evolution of urbanization in the study area: aerial photographs and satellite images which were integrated in a geographic database. Through the results, it was possible to verify that the silting volume occupies approximately 44% of the useful volume of the reservoir, the urbanization rate has growth trends, and, 88.42% of the river basin was urbanized in 2014. Thus, it represents a spatial distribution and establishes correlations between sedimentation studies over the last five decades.

Classification of vegetation in Cucphuong National Park with the aim of large-scale mapping, Vietnam

1996 ◽  
pp. 64-67 ◽  
Author(s):  
Nguen Nghia Thin ◽  
Nguen Ba Thu ◽  
Tran Van Thuy
Keyword(s):  
National Park ◽  
Large Scale ◽  
Satellite Images ◽  
Field Work ◽  
Aerial Photographs ◽  
Vegetation Map ◽  
Dense Forest ◽  
Broad Leaved Forest ◽  
Leaved Forest

The tropical seasonal rainy evergreen broad-leaved forest vegetation of the Cucphoung National Park has been classified and the distribution of plant communities has been shown on the map using the relations of vegetation to geology, geomorphology and pedology. The method of vegetation mapping includes: 1) the identifying of vegetation types in the remote-sensed materials (aerial photographs and satellite images); 2) field work to compile the interpretation keys and to characterize all the communities of a study area; 3) compilation of the final vegetation map using the combined information. In the classification presented a number of different level vegetation units have been identified: formation classes (3), formation sub-classes (3), formation groups (3), formations (4), subformations (10) and communities (19). Communities have been taken as mapping units. So in the vegetation map of the National Park 19 vegetation categories has been shown altogether, among them 13 are natural primary communities, and 6 are the secondary, anthropogenic ones. The secondary succession goes through 3 main stages: grassland herbaceous xerophytic vegetation, xerophytic scrub, dense forest.

Learning English and Irish via satellite images and aerial photographs

Planet ◽  
2012 ◽  
Vol 26 (1) ◽  
pp. 31-35
Author(s):  
Dennis Edler ◽  
Nils Lammert-Siepmann ◽  
Carsten Jürgens
Keyword(s):  
Satellite Images ◽  
Aerial Photographs ◽  
Learning English

scholarly journals The duration of the active phase on surge-type glaciers: contrasts between Svalbard and other regions

1991 ◽  
Vol 37 (127) ◽  
pp. 388-400 ◽  
Author(s):  
Julian A. Dowdeswell ◽  
Gordon S. Hamilton ◽  
Jon Ove Hagen
Keyword(s):  
Time Series ◽  
North America ◽  
Active Phase ◽  
Aerial Photographs ◽  
Polar Ice ◽  
Phase Duration ◽  
Field Surveys ◽  
The World ◽  
Glacier Surges ◽  
Fast Motion

AbstractMany glaciers in Svalbard and in other glacierized areas of the world are known to surge. However, the time series of observations required to assess the duration of fast motion is very restricted. Data on active-phase duration in Svalbard come from aerial photographs, satellite imagery, field surveys and airborne reconnaissance. Evidence on surge duration is available for eight Svalbard ice masses varying from 3 to 1250 km2. Worldwide, active-phase duration is recorded for less than 50 glaciers. Few observations are available on high polar ice masses. The duration of the active phase is significantly longer for Svalbard glaciers than for surge-type glaciers in other areas from which data are available. In Svalbard, the active phase may last from 3 to 10 years. By contrast, a surge duration of 1–2 years is more typical of ice masses in northwest North America, Iceland and the Pamirs. Ice velocities during the protracted active phase on Svalbard glaciers are considerably lower than those for many surge-type glaciers in these other regions. Mass is transferred down-glacier more slowly but over a considerably longer period. Svalbard surge-type glaciers do not exhibit the very abrupt termination of the active phase, over periods of a few days, observed for several Alaskan glaciers. The duration of the active phase in Svalbard is not dependent on parameters related to glacier size. The quiescent phase is also relatively long (50–500 years) for Svalbard ice masses. Detailed field monitoring of changing basal conditions through the surge cycle is required from surge-type glaciers in Svalbard in order to explain the significantly longer length of the active phase for glaciers in the archipelago, which may also typify other high polar ice masses. The finding that surge behaviour, in the form of active-phase duration, shows systematic differences between different regions and their environments has important implications for understanding the processes responsible for glacier surges.

Study of Ancient Land Boundaries at Tauric Chersonesos Using Satellite Images

2019 ◽  
Vol 25 (1) ◽  
pp. 44-58 ◽  
Author(s):  
Edgar A. Terekhin ◽  
Tatiana N. Smekalova
Keyword(s):  
Remote Sensing ◽  
Information Systems ◽  
Geographic Information Systems ◽  
Satellite Images ◽  
Agricultural Land ◽  
Remote Sensing Data ◽  
Field Surveys ◽  
The 1960S ◽  
Better Than ◽  
Made In

Abstract The near chora (agricultural land) of Tauric Chersonesos was investigated using multiyear remote sensing data and field surveys. The boundaries of the land plots were studied with GIS (Geographic Information Systems) technology and an analysis of satellite images. Reliable reconstruction of the borders has been done for 231 plots (from a total of about 380), which is approximately 53% of the Chersonesean chora. During the last 50 years, most of the ancient land plots have been destroyed by modern buildings, roads, or forests. However, in the 1960s, a significant part of the chora was still preserved. Changes in preservation with time were studied with the aid of satellite images that were made in 1966 and 2015. During that period, it was found that the number of plots with almost-complete preservation decreased from 47 to 0. Those land plots whose preservation was better than 50% dropped from 104 to 4. A temporal map shows this decline in preservation. It was found that the areas of land plots could be determined accurately with satellite images; compared to field surveys, this accuracy was about 99%.

The Question of the Future of Indian Muslims in Malaysia: The Post-Mahathir Legacy Era

2012 ◽  
Vol 11 (1-2) ◽  
pp. 219-246 ◽  
Author(s):  
Ahmad Noor Sulastry Yurni
Keyword(s):  
Paradigm Shift ◽  
Social Economic ◽  
Ethnic Politics ◽  
Muslim Community ◽  
British Colonialism ◽  
Way Of Life ◽  
New Paradigm ◽  
Economic Allocation ◽  
Islamic Resurgence ◽  
The Difference

Abstract Abstract The Malays, Chinese and Indian community in Malaysia have been homogenized since British colonialism. The existence of Indian Muslims’ identity caused a new paradigm shift in Malaysia involving the racial discussion. This paper traces the difference in Indian Muslims’ identities from Indian and the Hindus. I argued that Indian Muslims share Islam as their religion and faith, while maintaining a Malay way of life and custom in their daily practices. In Malaysia, the Indian Muslim community struggled to place their future in terms of social, economic allocation and political justification among the other communities. However, the strength of ethnic politics clearly charted out their involvement in the political base and moved them to fight for their cause and rights. Hence, today’s Indian Muslim community has caused an Islamic resurgence, which has brought a new Indian dimension as a whole.

Regional-scale analysis of dune-beach systems using Google Earth Engine

2021 ◽  
Author(s):  
Melissa Latella ◽  
Arjen Luijendijk ◽  
Carlo Camporeale
Keyword(s):  
Ecosystem Services ◽  
Satellite Images ◽  
Regional Scale ◽  
Google Earth ◽  
Classification Algorithm ◽  
Mitigation Strategies ◽  
Training Data ◽  
Machine Learning Techniques ◽  
Beach Width ◽  
Google Earth Engine

<p>Coastal sand dunes provide a large variety of ecosystem services, among which the inland protection from marine floods. Nowadays, this protection is fundamental, and its importance will further increase in the future due to the rise of the sea level and storm violence induced by climate change. Despite the crucial role of coastal dunes and their potential application in mitigation strategies, the phenomenon of the coastal squeeze, which is mainly caused by the urban sprawl, is progressively reducing the extents of the areas where dune can freely undergo their dynamics, thus dramatically impairing their capability of providing ecosystem services.</p><p>Aiming to embed the use of satellite images in the study of coastal foredune and beach dynamics, we developed a classification algorithm that uses the satellite images and server-side functions of Google Earth Engine (GEE). The algorithm runs on the GEE Python API and allows the user to retrieve all the available images for the study site and the chosen time period from the selected sensor collection. The algorithm also filters the cloudy and saturated pixels and creates a percentile-composite image over which it applies a random forest classification algorithm. The classification is finally refined by defining a mask for land pixels only. </p><p>According to the provided training data and sensor selection, the algorithm can give different outcomes, ranging from sand and vegetation maps, beach width measurements, and shoreline time evolution visualization. This very versatile tool that can be used in a great variety of applications within the monitoring and understanding of the dune-beach systems and associated coastal ecosystem services. For instance, we show how this algorithm, combined with machine learning techniques and the assimilation of real data, can support the calibration of a coastal model that gives the natural extent of the beach width and that can be, therefore, used to plan restoration activities. </p>

scholarly journals Identificação de Unidades de Paisagem: metodologia aplicada a Portugal Continental

Finisterra ◽  
2012 ◽  
Vol 36 (72) ◽  
Author(s):  
Teresa Pinto Correia ◽  
António Cancela Abreu ◽  
Rosário Oliveira
Keyword(s):  
Spatial Planning ◽  
Satellite Images ◽  
Methodological Approach ◽  
Subjective Assessment ◽  
The Other ◽  
Field Surveys ◽  
Flexible Approach ◽  
Landscape Units ◽  
The One ◽  
The University

IDENTIFICATION AND CHARACTERISATION OF LANDSCAPE IN PORTUGAL –This paper presents the concepts and methodology used in the study «Identification and characterisation of landscape in continental Portugal» undertaken by theDepartment of Landscape and Biophysical Planning of the University of Evora for the General Directorate for Spatial Planning and Urban Development (DGOT-DU) at the Ministry of the Environment and Spatial Planning, between 1999 and 2001. On the one hand, the methodological approach developed is based on the methodologies used recently for the same purpose in different European countries and on the way landscape has been considered in various European documents in the last years. On the other hand, it is also based on the team’s concern to approach the landscape as an holistic entity, and to examine its various components: ecological, cultural, socio-economic and sensorial. The set aim has been to define landscape units and to characterize these units in relation to the present landscape and the recorded trends, related problems and possibilities. Thus, the cartography relative to selected variables has been combined and related to satellite images and field surveys. The results of cross-referencing all this information has than been combined with expert examination of landscape coherence and character within each unit. The assessment was completed after careful bibliographic research and consultation with regional experts. The result is a flexible approach that combines objective analysis with a more subjective assessment, which the team considered fundamental for a true understanding of landscape.

scholarly journals Evolution of Vegetation Fraction Cover in Agricultural Areas Affected by Prellonged Draughts in the South Regions of Romania

2018 ◽  
Vol 1 (1) ◽  
pp. 346-351 ◽  
Author(s):  
Catalina Bordun ◽  
Argentina Teodora Nertan ◽  
Sorin Mihai Cimpeanu
Keyword(s):  
Satellite Images ◽  
Social Economic ◽  
Time Frame ◽  
The South ◽  
Vegetation Fraction ◽  
South West ◽  
The Social ◽  
Agricultural Areas ◽  
Fair Balance ◽  
Evolution Of Vegetation

Abstract The draught phenomena affecting the traditional agricultural areas in south of Romania has been increasing in intensity over the time, leading to the desertification of several thousands of hectares in the south part of the country. In this study we have computed the vegetation fraction cover for the South-West and South - East regions of Romania, based on the minimum and maximum NDVI extracted from MODIS satellite images. The time frame to refer to is 2000 - 2017, perennially, with special significance given the numerous and prolonged draught intervals these areas have been facing and the social economic evolution, from small farms to large agricultural holdings. The resulted vegetation fraction cover (fc) is correlated to the SPI values in order to determine a pattern to be used in anticipating deviations from the seasonal vegetation productivity. As a conclusion, the study presents a fair balance, indicating the most sensitive areas in soil vegetation cover, due to the SPI change.

Sign in / Sign up

Export Citation Format

Share Document