نتایج جستجو برای: land cover changes

تعداد نتایج: 1056014  

Journal: :ISPRS Int. J. Geo-Information 2013
Eleni Yeshaneh Wolfgang Wagner Michael Exner-Kittridge Dagnachew Legesse Günter Blöschl

This study analyzed more than 50 years of land cover and land use changes in the 260 km 2 Koga catchment in North Western Ethiopia. The data used includes 1:50,000 scale aerial photographs, Landsat MSS, TM and ETM images, and ASTER images together with ground truth data collected through field surveys and community elders’ interviews. Aerial photographs have high spatial resolution but provide ...

Journal: :Environmental monitoring and assessment 2015
Hai Chen Jessica Marter-Kenyon David López-Carr Xiao-ying Liang

This study examines landscape changes in the context of China's national Grain for Green (GFG) policy, one of the world's largest "payment for environmental/ecosystem services" (PES) programs. We explored landscape structures and dynamics between 2000 and 2010 in Shaanxi Province, the Chinese province with the greatest amount of cropland conversion and reforestation in recent decades. We used L...

2016
Vladimir R. Wingate Stuart R. Phinn Nikolaus Kuhn Lena Bloemertz Kiran L. Dhanjal-Adams Parth Sarathi Roy Clement Atzberger Prasad S. Thenkabail

Woodlands and savannahs provide essential ecosystem functions and services to communities. On the African continent, they are widely utilized and converted to subsistence and intensive agriculture or urbanized. This study investigates changes in land cover over four administrative regions of North Eastern Namibia within the Kalahari woodland savannah biome, covering a total of 107,994 km2. Land...

Journal: :Remote Sensing 2016
Vladimir R. Wingate Stuart R. Phinn Nikolaus Kuhn Lena Bloemertz Kiran L. Dhanjal-Adams

Woodlands and savannahs provide essential ecosystem functions and services to communities. On the African continent, they are widely utilized and converted to subsistence and intensive agriculture or urbanized. This study investigates changes in land cover over four administrative regions of North Eastern Namibia within the Kalahari woodland savannah biome, covering a total of 107,994 km2. Land...

2011
Luke O. OLANG Peter KUNDU Thomas BAUER Josef FÜRST

Spatio-temporal land cover changes witnessed within the Nyando River Basin of Kenya were assessed in this study. The land cover changes were mapped by classifying the predominant land cover classes on selected Landsat satellite images. The accuracy of the classifications were assessed using reference datasets developed and processed in a GIS with the help ground based information obtained throu...

Journal: :Int. J. Applied Earth Observation and Geoinformation 2017
Ron Hagensieker Ribana Roscher Johannes Rosentreter Benjamin Jakimow Björn Waske

Remote sensing satellite data offer the unique possibility to map land use land cover transformations by providing spatially explicit information. However, detection of short-term processes and land use patterns of high spatial-temporal variability is a challenging task. We present a novel framework using multi-temporal TerraSAR-X data and machine learning techniques, namely Discriminative Mark...

Land cover/land use categories are relevant components in land management. Understanding how land cover/land use change over time is necessary to assess the consequences of humans and natural stressors on the earth’s environment and resources. The aim of the study was to map and monitor the spatial and temporal change in land cover/land use for the periods of 1977, 1991 and 2016 and to predict ...

2010
Stephen Horn

This project focuses on how agricultural land cover has changed over time in comparison to developed and turf/grass land cover areas. This was done for two areas, the State of Connecticut and the area of Hartford County, Connecticut. This project defines specific areas in which agricultural land cover have changed to another type of land cover between the years 1985 and 2006. Changes to develop...

The present study was conducted to assess socio-economic impacts of deforestation of Hyrcanian forests in two basins of Do-Hezar and Se-Hezar, northern Iran. To this end, changes in the forest area were detected over the period between 1990 and 2006 based on land use land cover maps derived from Landsat and IRS satellite images. The land use changes were investigated by enhancement of the image...

1998

This ten-year general circulation model experiment compared a simulation where land surface boundary conditions were represented by observed, present day land cover to a simulation where the surface was represented by natural, potential land cover conditions. As a result of these estimated changes in historical land cover, signi®cant temperature and hydrology changes a€ected tropical land surfa...

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