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沙漠化耕地调查评价与生态恢复 被引量:1
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作者 朱明君 《中国土地科学》 CSSCI 2002年第4期30-34,共5页
自然条件和不合理的土地利用方式的耦合造成并加速了耕地沙漠化,沙漠化已经造成严重的土地资源退化和生态环境问题,尤其是耕地沙漠化对工农业生产造成严重影响。沙漠化耕地调查评价与生态恢复已成为土地资源合理利用的当务之急。
关键词 沙漠化耕地 成因 调查评价 生态恢复 土地利用 评价模型 产权制度
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Application of Remote Sensing and GIS Technology to the Study of Desertification of Arable Lands in North Shaanxi, China 被引量:2
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作者 MushtakTalibJabbar HUGuangdao ZHANGZhenfei 《Geo-Spatial Information Science》 2004年第3期187-192,共6页
The policy of the Chinese government concerning the horizontal expansion of the cultivated land through the reclamation of desert soils result in a total increase of 665.985 km 2 during the period 1987\|1999 in North ... The policy of the Chinese government concerning the horizontal expansion of the cultivated land through the reclamation of desert soils result in a total increase of 665.985 km 2 during the period 1987\|1999 in North Shaanxi. This increase is less than the loss in arable land by urbanization. The accelerated rate of change in agricultural areas calls for more rapid surveys of urbanization and loss of arable land. Remote sensing has a number of advantages over ground\|based methods for such surveys. The multi\|scale concept of remote sensing data help us study the problem in four towns. Several maps were produced to analyze the situation of urban coverage in different times. The evaluation of the status, rate and risk of urbanization are based on an accepted average of urban increase as 2% of population growth per year. 展开更多
关键词 URBANIZATION population pressure arable land DESERTIFICATION REMOTESENSING GIS
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