长江院学术报告:高寒山区地下水对河流水资源的贡献研究

发布者:校科协发布时间:2021-01-07浏览次数:74

报告人简介:

  • 郑春苗
  • 南方科技大学环境科学与工程学院创院院长
  • 国际水文科协(IAHS)国际地下水委员会前任主席
  • 美国地球物理联合会会士(AGU Fellow)
  • 美国地质学会(GSA)O.E. Meinzer Award获得者

  • 美国地下水协会(NGWA)M. King Hubbert Award获得者

报告内容简介:

Major rivers flowing from the Himalayan-Tibetan Plateau provide critical water resources for two billion people who live downstream and rely on Himalayan rivers for irrigation, hydropower and in-stream flows for aquatic habitat. While groundwater discharge to rivers is known to contribute to available water resources, how much Himalayan rivers depend on groundwater is unknown, and this compromises Asia’s future water sustainability and natural hazards management. Here, we quantify the spatiotemporal contribution of groundwater to river flows in the largest river basin of the Himalayas in China — Yarlung Zangbo Basin (upper reaches of Brahmaputra), using a physically based three-dimensional groundwater model constrained with hydrogeological information and over 50 years of streamflow data. We also used stable and radioactive isotopes to quantify the contribution of groundwater to proglacial lakes and identify moisture sources of precipitation on the plateau. This study fills a knowledge gap on subsurface flow process in the northern Himalayas and provides a baseline for projecting changes in the water cycle and for evaluating associated hazards under climatic warming over vulnerable water tower regions.

报告时间:

2021年01月08日 09:30-11:30

报告地点:

河海大学信息馆202扬子报告厅