Environmental hydraulics, a neighboring research field to ecohydrology, is an intermediate area between hydrodynamics and ecology/biology. The main research topic of this emerging scientific discipline is the interdependency and interconnectedness between water flow and the behavior of various aquatic organisms. This truly interdisciplinary approach reveals numerous unanswered questions, mostly related to the relationship between water flow, sediment, vegetation, nutrients, and harmful substances in the hydro-environment, and leads to better insight into river status, often called “river health”. In this paper, we review some of the basic research questions and challenges in the field of environmental hydraulics. The discussion is inspired by the outcomes of the recent 6^th IAHR Europe Congress 2020 where the community of hydro-engineers met experts engaged in the UNESCO Intergovernmental Hydrological Programme (IHP-VIII).

环境水力学是与生态水文学相邻的研究领域，是介于水动力学和生态/生物学之间的一个中间领域。这一新兴学科的主要研究课题是水流与各种水生生物行为之间的相互依赖和相互联系。这种真正的跨学科方法揭示了许多悬而未决的问题，主要涉及水流、沉积物、植被、营养物质和水环境中有害物质之间的关系，并有助于更好地了解河流状况，通常称为“河流健康”。在本文中，我们回顾了环境水力学领域的一些基础研究问题和挑战。讨论的灵感来自于最近 6^日的成果在 2020 年 IAHR 欧洲大会上，水利工程师社区会见了参与联合国教科文组织政府间水文计划 (IHP-VIII) 的专家。