Baro Hydropower Projects Pre-feasibility Study Summary
Project Title: Baro Hydropower Projects Pre-feasibility Study - Volume 5: Initial Environmental Assessment (IEA)
Location: Baro River Basin, Ethiopia
Prepared by: AQUATECH Ab/Prt. Ltd (Ethiopia) & Norplan A S./Norconsult Int. A.S. (Norway)
Date: December 1998
1. Project Overview
The Baro Hydropower Project (HPP) consists of two potential powerhouse locations (Baro 1 and Baro 2) and a main reservoir area upstream. The study area is divided into:
- Project Area: Powerhouse, intake structure, tailrace outlet, operational compound
- Main Reservoir Area: Dam area, inundation area, construction compound
- Direct Impact Zone (DIZ): Area with measurable environmental and socio-economic changes
- Secondary Impact Zone: Wider area with slight but noticeable changes
2. Project Components
Baro 1 Project
- Installed Capacity: 194 MW
- Annual firm energy production: 647 GWh
- Dam type: Concrete face rock fill dam (height: 81m, crest length: 800m)
- Reservoir size: 800 million m³ (inundation area: 27 km²)
Baro 2 Project
- Installed Capacity: 475 MW
- Annual firm energy production: 2,094 GWh
- Dam type: RCC type dam (height: 30m, crest length: 790m)
3. Environmental Baseline Conditions
Bio-physical Environment
- Climate: Monsoon wet season (May/June to September/October)
- Hydrology: High flow season (July-October) accounts for 80% of annual flows
- Terrestrial Environment: Transitional Evergreen Forests with rich biodiversity including endemic species
- Aquatic Environment: Limited data on fish species but known diversity in Gambela Region
Socio-economic Environment
Area | Ethnic Groups | Population Affected | Main Livelihoods |
---|---|---|---|
Baro 1 | Oromo (92%), Amhara (6%), Tigray (2%) | 176 people (40 households) | Crop production (coffee, maize, sorghum) |
Baro 2 | Oromo (92%), Mejenger (4%), Tigray (2%), Amhara (2%) | 95 people | Grain production, bee-keeping |
Main Reservoir | Shakicho (74.5%), Oromo (21.6%), Manja (3.9%) | 317 people (87 households) | Cultivation, bee-keeping, livestock |
4. Potential Environmental Impacts
Bio-physical Impacts
- Habitat loss: 2,600 ha forest at Baro 1, 1,304 ha at Baro 2, 3,800 ha at main reservoir
- Aquatic impacts: Alteration to river regime, potential fish species composition changes
- Soil erosion: Increased during construction phase
- Water quality: Potential eutrophication in reservoirs
Socio-economic Impacts
- Total of 588 people potentially affected by relocation
- Pressure on social services (health, education)
- Potential conflicts between migrant workers and local communities
- Land take for project infrastructure
5. Mitigation Measures
Bio-physical Mitigation
- Compensation flow releases (suggested minimum: 20.8 m³/s downstream of Baro 1 & 2, 13.6 m³/s from main dam)
- Vegetation clearance prior to reservoir filling
- Erosion control measures
- Reservoir management to minimize stratification effects
Socio-economic Mitigation
- Resettlement plan following World Bank guidelines
- Compensation for lost assets and productive resources
- Community gain initiatives (road upgrades, water supply improvements)
- Public awareness campaigns
- Preference for local employment during construction
6. Environmental Management and Monitoring
- Environmental management plan for construction and operation phases
- Staff training in environmental assessment and mitigation
- Catchment area management to control erosion and sedimentation
- Monitoring programs for terrestrial and aquatic environments
7. Conclusions
The Baro Hydropower Project has significant potential for electricity generation but will require careful environmental management to mitigate impacts on forest ecosystems, aquatic habitats, and local communities. The project is classified as a World Bank Category A project due to its potential significant environmental impacts, particularly regarding forest loss and population displacement. A full Environmental Assessment is recommended to further quantify impacts and refine mitigation measures.
Key Recommendations:
- Proceed with full Environmental Assessment (EA) before implementation
- Develop detailed resettlement and compensation plans
- Implement comprehensive environmental monitoring program
- Consider community gain initiatives to offset local impacts