| Analysis based on RS ＆ GIS of the effect of land-use/cover change on vegetation carbon reserves in arid region — A case study on oases of Shanshan Xinjiang |
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| DOI：10.7606/j.issn.1000-7601.2007.06.46 |
| Key Words: RS & GIS arid region land use/cover change vegetation carbon storage |
| Author Name | Affiliation | | ZHOU Xu | College of Environmental Science and Engineering Sun Yat-Sen University,Guangzhou,Xinjiang 510275 | | LIU Zhi-hui | College of Environmental Science and Engineering Sun Yat-Sen University,Guangzhou,Xinjiang 510275；International Center for Desert Research on Sustainable Development in Arid and Semi-arid Lands,Urumqi,Xinjiang 830046；Key Laboratory of Oasis Ecology of Xinjiang Uygur Autonomous Region Xinjiang University,Urumqi, Xinjiang 830046,China | | DAI Wei | College of Environmental Science and Engineering Sun Yat-Sen University,Guangzhou,Xinjiang 510275 | | JU Chun-yan | College of Environmental Science and Engineering Sun Yat-Sen University,Guangzhou,Xinjiang 510275 | | YI Li | College of Environmental Science and Engineering Sun Yat-Sen University,Guangzhou,Xinjiang 510275 | | JI ANG Hong | College of Environmental Science and Engineering Sun Yat-Sen University,Guangzhou,Xinjiang 510275 |
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| Abstract: |
| Land use/cover changes have been an important effect on carbon cycle.In this paper,we used multitemporal Landsat TM/SPOT4(P) merge data and SPOT5(XS/XI) data to compute the extent of different land cover types and mutual transformation one another in oases plain.The land-cover maps were made by the hybrid classification(method of combining unsupervised classification and supervised classification),and then the changes were detected.Carbon storages were assessed by using the results of multi-temporal Landsat TM/SPOT4(P) merge data and SPOT5(XS/XI) data and the published data about carbon storage in vegetation.Results indicate that the change rates of woodland area increased +4.5% per year from 1990～1999.Whereas,it decreased-1.7% per year from 1999～2004.Carbon storages in vegetation added to 264.13×103 t from 1990～1999 and it reduced to 70.75×33 t from 1999～2004.However,carbon storage in vegetation was steady increased by 212.04×103 t for 15 years.Thus,there has been a little carbon sink in the study area.But carbon storage in natural grassland was dramatically diminished,thus the state of local environment has been extremely frail.So,reasonable and scientific supervisionof the land use and environmental protection should be attached special importance. |
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