RT null T1 Improving the Environmental Performance of Dams: Project Synthesis Report A1 United Nations Environment Programme, A1 United Nations Foundation, A1 International Union for Conservation of Nature, K1 biological diversity K1 dam K1 bird K1 environmental impact assessment K1 environmental performance K1 fish K1 marine mammal K1 river basin K1 sedimentation K1 water chemistry K1 water resource K1 surface water YR 2001 FD 2001 LK https://wedocs.unep.org/handle/20.500.11822/29560 UL https://wedocs.unep.org/handle/20.500.11822/29560 NO This document, summaries the three IUCN/UNEP submissions to the World Commission on Dams. The current report focus on summarising the specific aspect of environmental and ecosystem impacts of large dams. It is not intended to provide the wider scope or analysis of large dam issues. The document does not present a specific framework of action, but rather provides a benchmark of current status. It provides an overview of present understanding of the impact of dams on ecosystems and biodiversity. It describes measures for ameliorating the negative environmental impacts and outlines mechanisms that historically have promoted approaches to avoid, mitigate and compensate negative environmental impacts. Mechanisms for funding amelioration interventions and ensuring developer compliance with such measures are presented. DS UN Environment Document Repository RD Sep 18, 2026