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Author: Huan Vu Duc
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 0
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Book Description
Landsat 7 Enhanced Thematic Mapper (ETM), Landsat 8 Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) images obtained in 1991, 2005 and 2014 with maps, and field survey data were used to classify land use and land cover (LULC) changes over 23 years and predict soil erosion risk locations in the Khlong Kui watershed (73,700 ha), Prachuap Khiri Khan province, Thailand. Classified images together with soil features, slope and rainfall data were used to identify potential risk areas of soil erosion. Based on field check data, the overall classification accuracy was accessed from random samples that resulted as 80% for 1991, 83% for 2005 and 86% for 2014. The study discovered that rice field and rangeland increased by 1.12 and 2.81%, respectively, deciduous forest, and on the other hand, it decreased by 8.28%. GIS analysis identified the potential risk areas of soil erosion as 46,431 ha (0.63%) at very high risk.
Author: Huan Vu Duc
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 0
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Book Description
Landsat 7 Enhanced Thematic Mapper (ETM), Landsat 8 Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) images obtained in 1991, 2005 and 2014 with maps, and field survey data were used to classify land use and land cover (LULC) changes over 23 years and predict soil erosion risk locations in the Khlong Kui watershed (73,700 ha), Prachuap Khiri Khan province, Thailand. Classified images together with soil features, slope and rainfall data were used to identify potential risk areas of soil erosion. Based on field check data, the overall classification accuracy was accessed from random samples that resulted as 80% for 1991, 83% for 2005 and 86% for 2014. The study discovered that rice field and rangeland increased by 1.12 and 2.81%, respectively, deciduous forest, and on the other hand, it decreased by 8.28%. GIS analysis identified the potential risk areas of soil erosion as 46,431 ha (0.63%) at very high risk.
Author: Luis Loures
Publisher: BoD – Books on Demand
ISBN: 1789857031
Category : Science
Languages : en
Pages : 318
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Book Description
The intensive increase in land use change is considered both a source of richness and a serious problem to landscape sustainability. In this scenario, although land use change plays a very important role for societal development, the impact of land use changes on economic, social, and ecological functions requires special attention. The new environmental paradigms associated with globalization and progressive climate change will certainly intensify the entropy and the instability in most of the existing land-uses. In this regard, this book aims to highlight a body of knowledge related to the discussion of the opportunities and challenges associated with the development of new sustainable landscapes, considering current and future challenges related to land-use changes and planning.
Author: Chamaporn Paiboonvorachat
Publisher:
ISBN:
Category :
Languages : en
Pages : 107
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Book Description
In this study, Landsat 5 TM images obtained in 1995, 2000, and 2005 were used to categorize land use and land cover (LULC) and assess LULC changes and dynamics in the Nan watershed, Thailand using hybrid classification and post-classification change detection methods, respectively. Aerial photographs, digital LULC maps, and topographic maps were utilized to assess classification accuracy. Classified images together with ancillary data using Multi-Criteria Geographic Information System (GIS) Modeling were used to identify potential risk areas of soil erosion. The overall classification accuracy derived from the stratified random sampling pattern was 80.9% for 1995, 77.4% for 2000, and 86.0% for 2005. The results are satisfactory for LULC classification. Uncertainty of classification was mainly observed in green vegetation cover categories, which are forests, agricultural lands, and natural plants in wetlands. The study period revealed a significant increase in paddy fields and croplands at the expense of closed canopy forests. Paddy fields and croplands increased by 2.56% and 3.37%, respectively. Closed canopy forests, on the other hand, decreased by 3.64%. This change was caused by an increase in population within the watershed during the study period. Closed canopy forest, open canopy forest, and cropland categories were major drivers of LULCC in the Nan watershed. In 2010, the probability of change from forests to paddy fields and croplands are approximately 0.13 and 0.16, respectively. Expansions of high risk areas of erosion in northwestern and southeastern regions of the watershed in the two later years related to an increase of agricultural lands. Deforestation and environmental degradation in the Nan watershed are mainly influenced by population growth and increase demand for land uses to support human activities.
Author: Chandra P. Giri
Publisher: CRC Press
ISBN: 1420070746
Category : Technology & Engineering
Languages : en
Pages : 481
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Book Description
Filling the need for a comprehensive book that covers both theory and application, Remote Sensing of Land Use and Land Cover: Principles and Applications provides a synopsis of how remote sensing can be used for land-cover characterization, mapping, and monitoring from the local to the global scale. With contributions by leading scientists from around the world, this well-structured volume offers an international perspective on the science, technologies, applications, and future needs of remote sensing of land cover and land use. After an overview of the key concepts and history of land-use and land-cover mapping, the book discusses the relationship between land cover and land use and addresses the land-cover classification system. It then presents state-of-the-art methods and techniques in data acquisition, preprocessing, image interpretation, and accuracy assessment for land-use and land-cover characterization and mapping. Case studies from around the world illustrate land-cover applications at global, continental, and national scales. These examples use multiple data sources and provide in-depth understanding of land cover and land-cover dynamics in multiple spatial, thematic, and temporal resolutions. Looking to the future, the book also identifies new frontiers in land-cover mapping and forecasting. The availability and accessibility of accurate and timely land-cover data sets play an important role in many global change studies, highlighting the need for better land-use and land-cover change information at multiple scales. A synthesis of current knowledge in remote sensing of land-use and land-cover science, this book promotes more effective use of Earth observation data and technology to assess, monitor, and manage land resources.
Author: Meenu Rani
Publisher: Springer Nature
ISBN: 3031064437
Category : Science
Languages : en
Pages : 347
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Book Description
Natural resources not only contribute to overall growth of the economy but also help reduce poverty by providing employment and food security to populations on the continent, and is thus the most inclusive growth sector of the economy of Asian countries. Global weather and climate studies are also increasingly being considered a vital source of information to understand the earth’s environment, in particular in the framework of weather and climate studies, land use transformation and human influence across these areas. Satellite earth observing systems provide a unique tool to monitor these changes. This book includes significant and up to date contributions in the field of sustainable natural resources conservation across the globe. While the range of applications and innovative techniques is constantly increasing, this book provides a summary of key case studies where satellite data offers critical information to help understand the causes and effects of those environmental changes, allowing us to reflect on how to minimize their negative impacts. This book is of interest to researchers and practitioners in the field of remote sensing, geographical information, meteorology, and environmental sciences. Scientists and graduate to post-graduate-level students in environmental science will also find valuable information in this book.
Author: Ginés García-Mateos
Publisher: MDPI
ISBN: 3039438050
Category : Technology & Engineering
Languages : en
Pages : 310
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Book Description
Remote image capture systems are a key element in efficient and sustainable agriculture nowadays. They are increasingly being used to obtain information of interest from the crops, the soil and the environment. It includes different types of capturing devices: from satellites and drones, to in-field devices; different types of spectral information, from visible RGB images, to multispectral images; different types of applications; and different types of techniques in the areas of image processing, computer vision, pattern recognition and machine learning. This book covers all these aspects, through a series of chapters that describe specific recent applications of these techniques in interesting problems of agricultural engineering.
Author: Henry Wood
Publisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 104
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Book Description
Author: Nils Rennenberg
Publisher: diplom.de
ISBN: 3832461353
Category : Science
Languages : en
Pages : 202
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Book Description
Inhaltsangabe:Abstract: Tropical land use changes, predominantly the clearing of tropical rain and monsoon forests, have long been recognized as a trend with dramatic consequences. FAO estimated the global loss of rain forest area at 0.6 to 0.9 % per annum in 1993. Most of it can be attributed to the conversion of forest lands to agricultural areas. In Southeast Asia, two countries have suffered from this phenomenon more than any other nations: the Philippines and Thailand. Between 1961 and 1975, the forest reserves of Thailand have been reduced from 57 % to 37 % of the total area, while at the same time the area put to agricultural use has almost doubled. Only a small part of that process was due to organized resettlement programmes; to an overwhelming extent the deforestation has been performed 'illegally' by spontaneous activities of the rural population. The share of forests further declined to 28.9 % in 1998, at a current rate of -0.7 % per year, meaning that Thailand's forest cover has roughly halved since 1960. The author of this thesis stayed as a visiting researcher at the Asian Institute of Technology (AIT), immediately north of Bangkok, for 6 months from November 2000 until April 2001. The AIT is a small international university for graduate studies with students and teachers from more than 40 countries. The core institution for this scientific cooperation was the Asian Center for Research on Remote Sensing (ACRoRS) of the AIT's School of Advanced Technologies (SAT). Field work in Northeast Thailand was carried out in two legs in February and April 2001. As an underlying principle of this study, it was attempted to incorporate problems from the realms of social as well as physical geography, i.e. to maintain a balance between questions of applied geography (regional studies) and remote sensing. This also means that no special focus was put on advanced RS methodology such as the development of new image processing techniques; the study is rather based on a somewhat holistic approach, joining aspects from many different fields of science as diverse as geology, geomorphology, climatology, agriculture and agricultural economics, sociology, ethnology, politics, and spatial planning. Accordingly, the basic objectives were: - to give a geographical description/characterization of the Northeastern Region of Thailand in terms of its physical properties as well as its social and economical peculiarities. - to try a quantification of forest [...]
Author: Pedzisai Kowe
Publisher: Frontiers Media SA
ISBN: 2832539491
Category : Science
Languages : en
Pages : 158
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Book Description
The rapid urban expansion and associated land cover conversions in the last two decades call for an urgent need for developing advanced analytical and quantitative methods to manage the adverse impacts on urban ecology and climate. The lower landscape connectivity, higher land cover fragmentation and increase in higher surface temperatures in urban areas are largely a consequence of surface energy balance alteration triggered by the replacement of natural land covers like green spaces, wetlands with built areas, and impervious surfaces. These spatial-temporal variability changes have detrimental and significant impacts on the local and regional urban climate challenges that require both new Geospatial Analytic approaches and new sources of data and information. Emerging Geospatial technologies (Big Data, Cloud Computing, Google Earth Engines, Advanced Machine Learning Algorithms and Deep learning) offer great opportunities to acquire ubiquitous spatial data, continuous observations, and monitoring of the earth’s surface, detect the spatiotemporal patterns of changes in the landscape and urban climate and make predictions and scenarios for future urban ecology and surface temperature trends.
Author: James Richard Anderson
Publisher:
ISBN:
Category : Land cover
Languages : en
Pages : 36
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