...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Sustainability >Have Changes to Unused Land in China Improved or Exacerbated Its Environmental Quality in the Past Three Decades?
【24h】

Have Changes to Unused Land in China Improved or Exacerbated Its Environmental Quality in the Past Three Decades?

机译：对中国未使用的土地有变化改善或加剧了过去三十年的环境质量吗？

获取原文
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Inappropriate land use has caused a series of environmental disasters such as floods and sand storms, and some of them involved unused land changes with highly localized distributions in arid and semi-arid regions with fragile ecosystems. As the third-rank category of first-level land use/cover in China, unused land (UL) is now playing an increasingly important role in protection of the natural environment and sustainable utilization of land resources. In this article, we assessed the effects on regional eco-environments employing a quantitative EL (ecological effect index) model, which can be used to evaluate and represent the contribution of UL changes to the eco-environmental quality. Results show that UL changes generally contributed to the deterioration of eco-environmental quality during the study period. Some major contributors to improving eco-environmental quality were transformation of sandy land and saline-alkali lands to grasslands, expansion of water bodies in UL areas, and reclamation of farmland in UL areas (except for marsh lands). In contrast, the main contributors to worsening eco-environmental quality were grassland degradation to UL (except marshes), reclamation of marsh areas, and shrinkage of water bodies to leave desert or saline-alkali land. Some suggestions are provided about UL management, utilization, and protection issues.
机译：土地使用不当导致了一系列环境灾害，如洪水和沙尘暴，其中一些人涉及未使用的土地变化，与脆弱的生态系统的干旱和半干旱地区的高度本地化分布。作为中国的第三级土地使用/封面的第三级别，未使用的土地（UL）现在在保护自然环境和可持续利用土地资源方面发挥着越来越重要的作用。在本文中，我们评估了采用定量EL（生态效应指数）模型的区域生态环境的影响，该模型可用于评估和代表UL变化对生态环境质量的贡献。结果表明，UL变化通常有助于在研究期间生态环境质量的恶化。一些改善生态环境质量的主要贡献者是桑迪土地和盐碱土地的转变为草地，ul地区的水体扩张，并在UL地区的挤出地区（沼泽土地除外）。相比之下，将生态环境质量恶化的主要贡献者是草地降解对UL（沼泽除外），沼泽地区的回收，以及水体的收缩，离开沙漠或盐碱土地。提供了一些关于UL管理，利用和保护问题的建议。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号