Mekong River Commission – Joint Project on Flood and Drought Management

Project Description
The 9C-9T sub-basin is a vital tributary of the Mekong River, shared by Thailand and Cambodia, supporting 1.4 million people and critical ecosystems linked to the Tonle Sap Lake. Its freshwater resources sustain agriculture, industry, biodiversity, and livelihoods, but are increasingly threatened by flood, drought, and climate change. The 9C-9T Joint Project, under GIZ’s Technical Cooperation for transboundary water governance in the Lower Mekong Basin (LMB), aimed to strengthen joint management and resilience through coordinated planning, monitoring, and investment. ICEM provided technical support during Phases II and III (2020–2024), focusing on planning, modelling, and early warning systems (EWS).

Objectives, Activities, and Results
ICEM supported the development of a transboundary flood and drought EWS across the 9C-9T sub-basin. Activities included stakeholder engagement, institutional assessments, design of the 9C-9T Basin Atlas and Flood and Drought Master Plan, and piloting of nature-based solutions. Phase III emphasized EWS design, capacity-building for local agencies and communities, and development of a gender-sensitive, cross-border monitoring network. ICEM facilitated national and regional consultations, finalized an upscaling strategy for replication in other LMB basins, and supported financing mobilization. The project strengthened bilateral cooperation, data sharing, and climate adaptation efforts in one of the Mekong region’s most critical transboundary basins.

client:
GIZ
LOCATION:
Cambodia,Thailand
TIME:
May 2020
to December 2021

TAGS

Climate Change, Disaster Risk Reduction, Environmental Economics, Project description, Water
Cambodia, Thailand
Completed Project

Atlas

Click here to access the 9C-9T Basin Atlas

Publications

ICEM worked with partners to identify and design a network of nature-based solutions (NbS) to strengthen flood and drought resilience across the basin. These measures complement hard infrastructure by restoring and protecting the ecosystems that underpin water security, biodiversity, and community wellbeing.

The report presents six priority project concepts, from transboundary headwaters to urban centres, each combining multiple NbS to address local drivers of flood and drought, including watershed degradation, biodiversity loss, sedimentation, and water scarcity. Proposed interventions include:

  • Forest restoration and riparian buffers in degraded catchments

  • Wetland rehabilitation and reservoir management

  • Sediment traps, sustainable irrigation, and agricultural buffers

  • Urban greening, constructed wetlands, and nature-based drainage

Together, these measures aim to form a connected network across the basin’s agricultural, urban, and headwater landscapes, delivering cumulative benefits for climate adaptation, ecosystem health, and sustainable development.

Click here to download the report

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