نتایج جستجو برای: cover change

تعداد نتایج: 689153  

Khadijeh Abolfathi Marzieh Alikhah-Asl Mohammad Namdar Mohammad Rezvani

The growing population and increasing socio-economic necessities creates a pressure on land use/land cover. Nowadays, land use change detection using remote sensing data provides quantitative and timely information for management and evaluation of natural resources. This study investigates the land use changes in part of Hableh Rood Watershed of Iran using Landsat 7 and 8 (Sensor ETM+ and OLI) ...

For an optimum use of natural resources in the sustainable development trend, there is a need to identify ecological resources in the shortest period of time and minimum possible cost. In this article, we aimed Management ecosystem by Assessment of plant covers changes at Taleghan Township in a twenty year period. Percentage of landscape and number of patch were among the metrics that were calc...

2017
Jason Barnetson Stuart Phinn Peter Scarth Robert Denham

Suitable measures of grazing impacts on ground cover, that enable separation of the 1 effects of climatic variations, are needed to inform land managers and policy makers across the arid 2 rangelands of the Northern Territory of Australia. This work developed and tested a time-series, 3 change-point detection method for application to time series of vegetation fractional cover derived 4 from La...

Journal: :Environmental management 2008
James D Wickham Timothy G Wade Kurt H Riitters

Meta-analyses reveal that nutrient yields tend to be higher for watersheds dominated by anthropogenic uses (e.g., urban, agriculture) and lower for watersheds dominated by natural vegetation. One implication of this pattern is that loss of natural vegetation will produce increases in watershed nutrient yields. Yet, the same meta-analyses also reveal that, absent land-cover change, watershed nut...

2007
U. Gangkofner J. Weichselbaum C. Hoffmann O. Arino S. Kleeschulte

The CARTO-CHANGE project addresses the harmonization of existing land cover data (Advanced CORINE LC, CORINE LC and GLOBCOVER) and thereby two aspects: Firstly, the cartographic and statistical comparison of land cover information across different scales and resolutions, and secondly the timely identification of candidate land cover changes by using land cover and land use information derived f...

2015
Kerry A. Brown Katherine E. Parks Colin A. Bethell Steig E. Johnson Mark Mulligan

Climate and land cover change are driving a major reorganization of terrestrial biotic communities in tropical ecosystems. In an effort to understand how biodiversity patterns in the tropics will respond to individual and combined effects of these two drivers of environmental change, we use species distribution models (SDMs) calibrated for recent climate and land cover variables and projected t...

2008
Amarnath Giriraj Mohammed Irfan-Ullah Manchi Sri Ramachandra Murthy Carl Beierkuhnlein

This study used time series remote sensing data from 1973, 1990 and 2004 to assess spatial forest cover change patterns in the Kalakad-Mundanthurai Tiger Reserve (KMTR), South Western Ghats (India). Analysis of forest cover changes and its causes are the most challenging areas of landscape ecology, especially due to the absence of temporal ground data and comparable space platform based data. C...

Journal: :Remote Sensing 2016
Konrad J. Wessels Frans van den Bergh David P. Roy Brian P. Salmon Karen C. Steenkamp Bryan MacAlister Derick Swanepoel Debbie Jewitt

The paper evaluated the Landsat Automated Land Cover Update Mapping (LALCUM) system designed to rapidly update a land cover map to a desired nominal year using a pre-existing reference land cover map. The system uses the Iteratively Reweighted Multivariate Alteration Detection (IRMAD) to identify areas of change and no change. The system then automatically generates large amounts of training sa...

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