黄河三角洲土地利用与土地覆被的质量变化
收稿日期: 2001-02-21
修回日期: 2001-09-02
网络出版日期: 2001-11-25
基金资助
国家自然科学基金项目 (49771005)
A Study on Land Use and Land Cover Quality Change:Taking Yellow River Delta as a Case
Received date: 2001-02-21
Revised date: 2001-09-02
Online published: 2001-11-25
Supported by
National Natural Science Foundation of China, No. 49771005
许学工, 陈晓玲, 郭洪海, 林辉平 . 黄河三角洲土地利用与土地覆被的质量变化[J]. 地理学报, 2001 , 56(6) : 640 -648 . DOI: 10.11821/xb200106002
Land use and land cover change (LUCC) plays, an important part in the studies of global environmental change and sustainable development. Land quality change can particularly reflect the impacts of human socio-economic activities on environment. By means of land classification for LUCC to different times of remote sensing information, picking-up vegetation index (NDVI), and assaying field repeated soil samples, as well as statistical analysis, this paper studies land use and land cover quality change of past several to 21 years in the Yellow River Delta. The conclusions are as follows: 1. In the Yellow River Delta, although sediment loads carried by the Yellow River result in rapid expansion of land area, the main driving force of LUCC is derived from human economic activities. 2. In the macroscopic view, land use and land cover quality change shows a tendency to improve because of water conservancy projects, vegetation cover and increase of per unit area yield of crop so that the overall ecological environment is improving in the mass. But in the microcosmic and point analysis, there are different and imbalanced development within the region. The task of transforming saline land is still arduous. The hidden trouble of soil fertility depression can not be neglected. 3. Both natural force and human action can engender environmental positive and negative effects. But it is more difficult to restore the latter made by human activities. The paper brings forward measures for sustainable land use. Finally, there is a discussion about issues of further study.
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