IMF-应对天气冲击_加强纳米比亚农业韧性的挑战和投资（英）-2025.7_15页_2mb

IMF Selected Issues Paper: Building Agricultural Resilience in Namibia Amid Weather Shocks

This paper by the IMF analyzes the impact of catastrophic weather shocks—especially droughts—in Namibia, an extremely arid country with high climate vulnerability, and outlines public investment strategies to enhance agricultural resilience and food security.

A. Overview of Namibia’s Climate Vulnerability

1. Extreme Climate Conditions

• Namibia faces an increasingly volatile climate system, with:
  • Rising temperatures (average increase of +1.2°C already, could reach +4°C by 2050 under a high emissions scenario).
  • Erratic rainfall patterns, declining rainfall potential, and more frequent droughts and floods.
  • Expected rainfall declines by up to 12% by 2050.

2. Water Scarcity and Impacts

• Ranked the 21st most water-stressed country globally with 92% of its land classified as arid.
• Severe surface and groundwater reductions affecting:
  • Agriculture: Already low crop yields (below SSA average), further threatened by climate change (projected 40-80% reduction by 2050 in moderate/extreme scenarios).
  • Energy: Heavy reliance on hydropower (79% in August 2024). Droughts have reduced domestic electricity generation, forcing increased reliance on imports.

3. Recent Drought Impacts

• The 2023–24 drought severely reduced crop output (falling ~31.7% in 2023 and ~6.6% in 2024), exacerbating food insecurity.
• Dam water levels dropped ~70%.
• Food insecurity affected ~40% of the population, pushing more than half into acute shortages.

B. Modeling the Economic Impact of Climate Change on Agriculture and Investment Strategies

1. Public Investment Needs

The analysis suggests the following priorities to build resilience:

2. Public Investment Scenarios

• Without adaptation investment:

  • Total GDP projected to drop by up to 7% in 2050 relative to a no-climate-change scenario.
  • Food imports could rise by a staggering 45%.

• Adaptation investment (splitting 1.5% of GDP across development and adaptation):

  • Significantly lowers economic vulnerability, with a limited total output loss of around 0.5% by 2050 under adaptation-friendly policies.
  • Specific recommendation: Blend 0.1–0.3% GDP of public investment toward adaptation strategies for cost-effective resilience building.

C. Key Recommendations

1. Allocate Fiscal Resources to Long-Term Adaptation

   • Balance immediate crisis response with forward-looking investments to build agricultural climate resilience.
   • Adopt policies that favor efficient public investment allocation for adaptation measures.

2. Improve Climate Monitoring and Risk Forecasting

   • Strengthen climate information systems and early warning mechanisms to better anticipate weather shocks.

3. Scale Up Adaptation Infrastructure

   • Prioritize investments in groundwater conservation, irrigation systems, climate-resilient seeds, and weather-indexed insurance.

4. Strengthen Public Investment Management (PIMA)

   • Enhance oversight for the effective use of fiscal resources to ensure that adaptation investments translate into real-world resilience.

D. Conclusion

Namibia's fragile agricultural sector requires strategic and sustained public investment to mitigate the impact of climate-induced weather shocks. Without significant adaptation efforts, current economic vulnerability to droughts and extreme temperature fluctuations will constrain economic growth and exacerbate food insecurity. A blended public investment strategy—combining adaptation and development capital—presents an economically viable path toward building climate resilience in Namibia’s agricultural economy, with fiscal space as the limiting factor, efficient governance the key requirement, and diversification and trade integration as secondary but complementary avenues.