Togo Reservoir Transparency

Togo's sole significant reservoir is the Nangbéto Dam (65 MW, ~1,715 Mm³) on the Mono River, operated jointly with Benin by CEB. CEB publishes periodic operational reports and some water level data, but releases are infrequent, non-systematic, and often in PDF or image format. The dam resumed full operations following a CFA 25.5 billion rehabilitation in recent years. No real-time or machine-readable storage data is published.

CEB publishes data primarily as PDF reports and PNG images, with no structured data downloads, APIs, or machine-readable formats. Historical operational data from the Nangbéto power plant is referenced in academic literature but not directly downloadable from CEB's website.

Capacity-weighted (v1.3.0): Nangbéto reservoir (~1,715 Mm³, shared with Benin and operated by CEB) dominates the national hydropower denominator and receives partial operational data coverage. However, smaller hydropower and irrigation facilities are absent from any public reporting. Score lowered from 80 to 70 to apply a conservative discount: smaller hydropower facilities not captured by CEB's dominant-reservoir disclosure, and CEB's coverage itself is partial/lagged (multi-year publication lag, PNG format only). Prior justification (preserved for context): Methodology denominator counts reservoirs with capacity >10 hm³. Togo has 1 qualifying reservoir: Nangbéto (~1,715 Mm³, jointly operated with Benin by CEB; physically located on the Mono River at the Togo-Benin border). Adjarala remains unbuilt. Nangbéto receives partial public coverage through CEB's annual PNG production charts (with multi-year publication lag) and academic literature citing CEB historical records, but no current storage level data is published. Coverage = round(100 × 0.5 / 1) = 50, reflecting that the one qualifying reservoir has degraded/lagged public data rather than no data at all.

The Nangbéto Dam has been operational since 1988, meaning approximately 38 years of operational records exist internally at CEB. Academic publications on Mono River hydrology reference historical discharge data from CEB's archives, but these records are not publicly accessible through a national portal.

CEB data releases appear to follow project-based or annual reporting cycles rather than real-time or monthly publication schedules. Water level interruptions affecting electricity supply (reported seasonally in media) confirm operational monitoring exists, but the results are not regularly published for public access.

CEB's monitoring methodology is partially described in World Bank project documentation from the original 1980s Nangbéto construction. Updated post-rehabilitation monitoring protocols have not been publicly documented. The Mono River variability (event-driven, seasonal, and multi-year) is described in peer-reviewed literature using CEB source data.

CEB and Togolese government documentation is in French. French is widely understood internationally and provides reasonable accessibility for Francophone West Africa and European researchers. No English-language national data portal for reservoir data exists.