• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Regional Environmental Change >Long-term biogeochemical functioning of the Red River (Vietnam): past and present situations
【24h】

Long-term biogeochemical functioning of the Red River (Vietnam): past and present situations

机译：红河（越南）的长期生物地球化学功能：过去和现在的情况

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Red River (North Vietnam) is a typical example of a subtropical Asian river system undergoing high human pressure. During the last 50 years, major changes have occurred in its watershed, extending over an area of 156,450 km~2 in Vietnam and China. We provide a detailed account of these changes, related to intensification of agriculture, deforestation, increase in population and urbanization, impoundment of reservoirs, etc. This information is used in a modeling approach of the nutrient transfers and transformations along the river system, in order to evaluate the changes in water quality of the Red River and its potential for coastal eutrophication. We conclude that the combination of increased nitrogen release from agriculture and retention of phosphorus in the reservoirs has considerably changed the balance of nutrients delivered at the outlet of the river, bringing the system close to a turning point in its nutrient biogeochemistry and its potential for coastal eutrophication. The upcoming impoundment of four new major dams in the watershed makes this conclusion particularly relevant.
机译：红河（越南北部）是亚洲亚热带河流系统承受高压的典型例子。在过去的50年中，其流域发生了重大变化，在越南和中国的面积超过156,450 km〜2。我们提供了有关这些变化的详细说明，这些变化与农业集约化，森林砍伐，人口增加和城市化，水库蓄水等有关。该信息用于沿河系统进行养分转移和转化的建模方法中，以便评估红河水质的变化及其对沿海富营养化的潜力。我们得出的结论是，农业释放氮的增加与水库中磷的保留相结合，大大改变了河流出口处输送的养分的平衡，使该系统接近其养分生物地球化学及其沿海潜力的转折点。富营养化。流域中四个新的大坝即将蓄水，使这一结论特别重要。

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