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Communication Dans Un Congrès Année : 2004

Environmental Change Monitoring — A Case Study in the Region of Yinchuan, Ningxia, China

Résumé

This paper focuses an interdisciplinary research on the land use change monitoring in the region of Yinchuan, Ningxia, China by geomaticse and multivariate regression modelling. Multi-temporal remote sensing data (Landsat TM 1987, 1989 and ETM+ 1999), county-level socio-economic and meteorological data in the corresponding period were utilised. The study aimed at discriminating the land use changes, understanding the human-environmental interaction and developing a dynamic monitoring system in order to provide useful references to the local governments for their sustainable land use planning and environmental management. The results show that 11.7% of the territory has evolved in the study area in the period 1987-1999: farmland extension is a predominant modification of the rural environment (471km2 in surface area, 49.3% of the total change), its related GDP growth occupies only 11.6%. The urban extension (35.8 km2 in surface area) takes up 3.6% of the total change, its related production increase constitutes, however, 88.4% of the GDP growth. Desert encroachment was not observed. But land degradation, taking forms of vegetation degradation, salinisation, coal residue covering and air pollution, has occurred due to industrial development, urbanisation, overgrazing, coal mining and deforestation. The running course of the Yellow River has been in narrowing at a rate of -6.1% and the surface of water-body has gained an increase of about 49km2. These phenomena indicate an overuse, even abuse of the river water in the region. Multivariate regression modelling reveals that each land use pattern has its spatial determinant(s) and each type of change is associated with certain driving forces. This kind of man-nature interaction analyses allow us to understand the mechanism of environmental modification and provide references for decision-making in mitigating human activities.
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Dates et versions

hal-00014210 , version 1 (21-11-2005)

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  • HAL Id : hal-00014210 , version 1

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Weicheng Wu. Environmental Change Monitoring — A Case Study in the Region of Yinchuan, Ningxia, China. 2004, pp.P.1-8. ⟨hal-00014210⟩
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