Datum
2011Metadata
Zur Langanzeige
Aufsatz
Assessment of land use and land cover changes during the last 50 years in oases and surrounding rangelands of Xinjiang, NW China
Zusammenfassung
An analysis of historical Corona images, Landsat images, recent radar and Google Earth® images was conducted to determine land use and land cover changes of oases settlements and surrounding rangelands at the fringe of the Altay Mountains from 1964 to 2008. For the Landsat datasets supervised classification methods were used to test the suitability of the Maximum Likelihood Classifier with subsequent smoothing and the Sequential Maximum A Posteriori Classifier (SMAPC). The results show a trend typical for the steppe and desert regions of northern China. From 1964 to 2008 farmland strongly increased (+ 61%), while the area of grassland and forest in the floodplains decreased (- 43%). The urban areas increased threefold and 400 ha of former agricultural land were abandoned. Farmland apparently affected by soil salinity decreased in size from 1990 (1180 ha) to 2008 (630 ha). The vegetated areas of the surrounding rangelands decreased, mainly as a result of overgrazing and drought events.The SMAPC with subsequent post processing revealed the highest classification accuracy. However, the specific landscape characteristics of mountain oasis systems required labour intensive post processing. Further research is needed to test the use of ancillary information for an automated classification of the examined landscape features.
Sammlung(en)
Vol 111, No 2 (2010) (Journal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS))Zitieren
@article{urn:nbn:de:hebis:34-2011052737598,
author={Dittrich, Andreas and Bürkert, Andreas and Brinkmann, Katja},
title={Assessment of land use and land cover changes during the last 50 years in oases and surrounding rangelands of Xinjiang, NW China},
year={2011}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2011$n2011 1500 1/eng 2050 ##0##urn:nbn:de:hebis:34-2011052737598 3000 Dittrich, Andreas 3010 Bürkert, Andreas 3010 Brinkmann, Katja 4000 Assessment of land use and land cover changes during the last 50 years in oases and surrounding rangelands of Xinjiang, NW China / Dittrich, Andreas 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/urn:nbn:de:hebis:34-2011052737598=x R 4204 \$dAufsatz 4170 7136 ##0##urn:nbn:de:hebis:34-2011052737598
<resource xsi:schemaLocation="http://datacite.org/schema/kernel-2.2 http://schema.datacite.org/meta/kernel-2.2/metadata.xsd"> 2011-10-11T14:01:59Z 2011-10-11T14:01:59Z 2011 1612-9830 urn:nbn:de:hebis:34-2011052737598 http://hdl.handle.net/123456789/2011052737598 eng Kassel University Press Urheberrechtlich geschützt https://rightsstatements.org/page/InC/1.0/ Altay Mountains LUCC Landsat Corona NDVI SMAPC MLC 630 Assessment of land use and land cover changes during the last 50 years in oases and surrounding rangelands of Xinjiang, NW China Aufsatz An analysis of historical Corona images, Landsat images, recent radar and Google Earth® images was conducted to determine land use and land cover changes of oases settlements and surrounding rangelands at the fringe of the Altay Mountains from 1964 to 2008. For the Landsat datasets supervised classification methods were used to test the suitability of the Maximum Likelihood Classifier with subsequent smoothing and the Sequential Maximum A Posteriori Classifier (SMAPC). The results show a trend typical for the steppe and desert regions of northern China. From 1964 to 2008 farmland strongly increased (+ 61%), while the area of grassland and forest in the floodplains decreased (- 43%). The urban areas increased threefold and 400 ha of former agricultural land were abandoned. Farmland apparently affected by soil salinity decreased in size from 1990 (1180 ha) to 2008 (630 ha). The vegetated areas of the surrounding rangelands decreased, mainly as a result of overgrazing and drought events.The SMAPC with subsequent post processing revealed the highest classification accuracy. However, the specific landscape characteristics of mountain oasis systems required labour intensive post processing. Further research is needed to test the use of ancillary information for an automated classification of the examined landscape features. open access In: Journal of Agriculture and Rural Development in the Tropics and Subtropics. Kassel : Kassel University Press. - Vol. 111, No. 2 (2010), S. 129-142 Dittrich, Andreas Bürkert, Andreas Brinkmann, Katja Gedruckte Ausg. im Verlag Kassel Univ. Press (www.upress.uni-kassel.de) erschienen. </resource>
Die folgenden Lizenzbestimmungen sind mit dieser Ressource verbunden:
:Urheberrechtlich geschützt