Climate change affecting land use in the Mekong Delta: Adaptation of rice-based cropping systems (CLUES)

  • Vietnam

ENTRY DATE: 09.03.2012 | LAST UPDATE: 09.03.2012

SCALE:

  • Sub-national Level

TARGET AREA:

  • Rural

BEST PRACTICE IN:

  • Capacity Building
  • Research and Development

KEY SECTOR:

  • Agriculture

FUNDING AMOUNT:

  • USD 1,000,001 - USD 5,000,000

Description of Intervention

• Hydrological modeling and development of a detailed maps of flooding and salinity intrusion under different climate change scenarios;
• Investigation of breeding approaches to improve stress tolerance rice to flooding and salinity, as well as anaerobic germination;
• Identification of a type of natural resource management that will enable rice cropping systems to be resilient to climate change impacts ;
• Assessment of sustainable livelihood and adaptation strategy through examination of farmers’ experiences in dealing with drought, flood and salinity problems in recent years;
• Identification of options of land uses for alleviating impacts of climate change in the coastal area; and
• Provide training and scientific infrastructure to facilitate initial GHG emission measurements in rice systems.

Problems to be Addressed

The Mekong Delta''s rice land use is divided into agro-hydrological zones which are controlled by the hydrology (especially the flood duration and depth), water availability and the salinity regimes. Recent and forecasted agro-hydrological changes threaten the viability of rice farming and social systems. Significant constraints that limit the ability of the farmers to adapt to the new hydrological regime include the availability of suitable cultivars, soil nutrient management options, the lack of knowledge of the potential threats from acid sulphate soil inundation, and planning tools.

Aims

Increase the adaptive capacity of rice production systems in the Mekong Delta Region

Objectives

To provide farmers and management agencies with technologies and knowledge that will improve food security in the Mekong Delta
The five specific objectives are:
• To improve salinity and submergence resilience of locally adapted rice varieties and elite lines;
• To build capacity for quantification of soil nutrient cycling (including the GHG emissions) from rice paddies;
• To develop integrated soil, crop, nutrient and water management options;
• To identify biophysical, social and economic factors determining the capacity of farmers to adapt to climate change; and
• To undertake in-depth analysis for land-use planning in coastal areas.

How it fits into the EbA concept

• The use of salt-and sub-tolerant varieties identified will bring back land and water resources that are currently underused, enhancing effective management of land use for rice planting;
• Provision of alternative income sources and livelihood options will help prevent overexploitation of natural resources, the man-made factor that will otherwise reduce the resilience of the land ecosystems to climate change impacts; and
• Appropriate natural resource management will reduce pollution load (acidity and agrochemicals) to the surrounding water and ecosystems.