DRAINAGE
UNIT

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Overview

The Drainage Unit of the Ghana Hydrological Authority plays a critical role in Ghana’s national flood management and urban water infrastructure development. The unit is responsible for the planning, design, supervision, and maintenance of stormwater drainage systems across the country to reduce flood risks, protect infrastructure, and enhance environmental sustainability.

Working under the mandate of the Ghana Hydrological Authority established by the Hydrological Authority Act, 2022 (Act 1085), the unit contributes to the development of resilient drainage infrastructure and provides technical expertise to government institutions, metropolitan, municipal, and district assemblies (MMDAs), as well as other stakeholders.

Roles and Functions

The Drainage Unit performs several key functions in support of national flood management and urban development, including:

  • Planning and design of stormwater drainage systems and flood control infrastructure.

  • Engineering analysis and hydraulic design of primary and secondary drainage channels.

  • Supervision and monitoring of drainage construction projects.

  • Drainage improvement and rehabilitation of existing drainage networks.

  • Technical advisory services on drainage engineering and flood mitigation.

  • Collaboration with local authorities in drainage planning and infrastructure development.

These functions contribute to the Authority’s broader responsibility of planning, designing, executing, operating, and maintaining flood control mechanisms and drainage improvement works nationwide

PROJECTS

TESHIE YOOMO SPECS DRAIN

TESHIE CENTRAL DRAIN

KROPO

KASOA IRON CITY STORM DRAIN AND FOOTBRIDGE

KAKUM

HAATSO STORM DRAINS (2)

DOME 3 CELL CULVERT AND ADJOINING STORM DRAIN

Dansoman

2192

2025

2132

Key Responsibilities

Drainage Infrastructure Planning

Development of drainage master plans and stormwater management strategies for cities and communities.

Design and Engineering Services

Hydraulic and hydrological analysis for drainage systems, culverts, floodways, and retention structures.

Flood Risk Reduction

Identification of flood-prone areas and development of engineering interventions to mitigate flood hazards.

Research and Innovation

Supporting studies on sustainable drainage systems, climate resilience, and flood management technologies.

Project Supervision

Monitoring the construction of drainage works to ensure compliance with engineering standards and specifications.

Technical Support to Local Governments

Providing engineering support to Metropolitan, Municipal, and District Assemblies (MMDAs) for drainage planning and implementation.