Transboundary Diagnostic Analysis (TDA) collects and analyses information to determine the socio-economic impact related to transboundary problems. TDA conclusions are used to identify priority mitigation actions, depending on ecosystem benefits and governance gaps. This Tool discusses the content and rationale for TDA, presents its key principles, outlines the Strategic Action Programme (SAP) process derived from TDAs, and identifies relevant considerations for practitioners.
Originally developed by the Global Environment Facility (GEF) International Water Programme, TDA became an indispensable tool to identify transboundary environmental problems (GEF, 2020). It is a procedure that aims to provide means for identifying the proximal, intermediate, and fundamental causes of environmental problems and threats in transboundary water basins (Teng, 2006). The TDA process allows to breakdown complex transboundary issues into smaller components for action. The main objectives of TDA are to:
- Identify and prioritise the transboundary problems and challenges.
- Collect and analyse information on environmental impact and socio-economic dimension of each problem.
- Assess immediate, underlying and root causes of each problem, suggesting areas suffering from or under threat of environmental degradation.
For the purpose of TDA, environmental impact comprises the effect of a particular transboundary problem on the whole ecosystem, while socio-economic impact can be characterised by any fluctuation in welfare of people, that is attributable to the problem in question or its impact. To determine such impacts, the TDA process should include an assessment of ecosystem value (economic valuation), which quantifies the ecosystem benefits and its impacts on people’s welfare (Tool C1.05).
Within subsequent TDA stages, potential preventive and mitigative actions are identified by assessing the root and immediate causes of the main transboundary concerns. The analysis begins as a joint fact-finding to fill in the information gaps and ensure that each state understands the situation in neighbouring countries. The TDA integrates scientific input into water management so that the decision-makers could conduct appropriate reforms within the water governance system to change the behaviour within a particular sector.