Spatiotemporal Pattern Variation of Cultivated Land Resource in Area of Middle and Lower Reaches of Jialing River

Tang Gu la; Hao Huaiyong; Zhang Baolei; Zhou Wancun

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Spatiotemporal Pattern Variation of Cultivated Land Resource in Area of Middle and Lower Reaches of Jialing River

- Spatiotemporal Pattern Variation of Cultivated Land Resource in Area of Middle and Lower Reaches of Jialing River
- Bulletin of Soiland Water Conservation Vol. 25, Issue 1, Pages: 30-33(2006)
- 作者机构：
  
  1. 中国科学院成都山地灾害与环境研究所,四川,成都,610041
  2. 中国科学院研究生院,北京,100039
- 作者简介：
- 基金信息：
- DOI：
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- Published：2006
- 稿件说明：
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Tang Gu la, Hao Huaiyong, Zhang Baolei, et al. Spatiotemporal Pattern Variation of Cultivated Land Resource in Area of Middle and Lower Reaches of Jialing River[J]. Bulletin of Soiland Water Conservation, 2006, 25(1): 30-33.
DOI：

Tang Gu la, Hao Huaiyong, Zhang Baolei, et al. Spatiotemporal Pattern Variation of Cultivated Land Resource in Area of Middle and Lower Reaches of Jialing River[J]. Bulletin of Soiland Water Conservation, 2006, 25(1): 30-33. DOI：

摘要

在地理信息系统和遥感技术的支持下

综合利用嘉陵江中下游地区的土地利用数据和DEM数据等

分析了该区的耕地资源现状及其对地形因子的响应

以及近50a来耕地资源的时空变化趋势。结果表明:研究区耕地面积经过长期的增加以后

正在迅速减少

但减少的结构不合理。建议在合理有效退耕还林、保护生态环境的同时

应确保耕地的数量和质量

维护区域粮食安全。

Abstract

Based on the technology of GIS and RS

applying the land use coverage data and DEM

the status of cultivated lands

and relations between the cultivated lands and landform in the areas of the middle and lower reaches of the Jialing River were analyzed

we also investigated spatiotemporal variation trend of cultivated land resources in the past 50 years.Results indicate the cultivated land area decreases abruptly after a long-term increase

but structure of the increased lands is unreasonable.So we must pay attention to both quantity and quality

which helps to the ecological environment construction

cultivated land resource uses

reforesting formerly cultivated land inspection

food security and so on.

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