• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Exploring Connections Between Landscapes and Streams. Science Findings, Issue One Hundred Nineteen (119), December 2009
【24h】

Exploring Connections Between Landscapes and Streams. Science Findings, Issue One Hundred Nineteen (119), December 2009

机译：探索风景和溪流之间的联系。科学发现，第一百九十九期（119），2009年12月

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

摘要

New technology has given scientists the means to probe the hidden world of belowground hydrology. Steve Wondzell with the Pacific Northwest Research Station and his colleagues conducted several experiments in Montanas Tenderfoot Creek Experimental Forest and Oregons H.J. Andrews Experimental Forest to determine which factors control the timing and location of water inputs from hillslopes to streams, the movement of water down the stream channel, and the consequences of these processes on watershed outputs. They found that the configuration of uplands draining into a watershed strongly affects the quantities of water delivered to a stream. In general, water from upper hillslopes reached the stream only during abundant precipitation and snow melting, except in places where the landscape was deeply incised and consistently hydrologically linked to the channel. These patterns of connectivity explain the seasonal patterns of runoff observed in individual watersheds. Other experiments charted significant gains and losses in water volume within and along the channel that were due to continual exchanges between the riparian zone, stream, and channel subsurface zone. A final facet of the research focused on the nuanced patterns of stream fluctuations caused by evapotranspiration from riparian trees. The researchers found that streamflow velocity governs the marked ebb and flow of evapotranspirations influence on water output at the streams mouth during summer. The findings provide clues to evaporative water loss from riparian vegetation and help elucidate how routing streamflow through stream networks affects whole-watershed responses.

著录项

相似文献

  • 外文文献
  • 中文文献
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