2004年-世界发展银行全球_Irrigated_Agriculture_in_the_Brazilian_Semi-Arid_Region___Social_Impacts_and_Externalities_152页_12mb

Summary of "Irrigated Agriculture in the Brazilian Semi-Arid Region: Social Impacts and Externalities"

Core Content

This report, prepared by the World Bank in collaboration with various Brazilian and international institutions, evaluates the impact of irrigated agriculture in the Brazilian Semi-Arid Region (BSA), with a focus on social externalities and economic performance. The study analyzed 11 irrigation schemes across five states, covering both public and private developments, to understand how irrigation has influenced regional development, poverty reduction, and economic growth.

Main Report Structure

1. Introduction and Objectives

• The study aims to assess the impact of irrigation investments on poverty reduction and regional development in the BSA.
• It evaluates the effectiveness of these projects and identifies lessons learned for future strategies.
• Eleven irrigation schemes were selected, representing 20% of all public projects, 45% of the irrigated area, and 50% of public investments.

2. Background

• Irrigation in the BSA is relatively new compared to other Latin American countries with long irrigation histories.
• Public investment in irrigation began in the early 1970s.
• Total public investment in irrigation in the BSA over the past 30 years was over US$2 billion, covering 200,000 hectares, of which 140,000 were under production.

3. Methodology

• The study used a combination of economic, socio-economic, and institutional-legal assessments.
• It included geoprocessing, videography, and radiometry to measure impacts.
• A comparative approach between municipalities with and without irrigation projects was used to examine externalities.

4. Economic and Financial Analysis

• The Economic Rates of Return (ERRs) and Net Present Values (NPVs) varied significantly among the schemes.
• Four schemes (Bebedouro, Tourão, Curaçá, and Mandacaru) showed positive ex-post returns.
• The Petrolina-Juazeiro schemes had an average ERR of 22.8% and aggregate NPV of US$57 million.
• The Jaíba project had a negative NPV of US$92 million and an ERR of 7.7%, due to poor planning, delays, and underutilization.
• The Morada Nova project, though initially aimed at smallholder farming, failed due to a flawed concept and lack of diversification.

5. Social and Economic Impacts

• Irrigated agriculture has contributed to job creation, with average costs of US$5,000–$6,000 per job, significantly lower than other sectors.
• It has had a positive impact on population growth, urbanization, poverty reduction, and economic development.
• However, many schemes have not fully realized their potential due to poor management, lack of technical support, and inadequate water pricing.

6. Main Conclusions and Lessons Learned

• Public investment in irrigation can be an effective strategy for regional development and poverty alleviation.
• Key factors for success include reliable water supply, competent management, political support, and timely financing.
• The most successful projects were those that involved entrepreneurial producers and had strong technical support.
• Poorly designed projects, such as Jaíba and Morada Nova, resulted in significant financial losses due to over-design and lack of market adaptability.

7. Strategic and Policy Options

• The report recommends including irrigated agriculture in regional development strategies.
• Improving the legal-institutional framework and attracting private sector participation are essential.
• Market studies should guide the expansion of irrigation schemes to avoid overproduction.
• A benchmarking plan and a timetable for implementation are suggested to ensure sustainable growth.

Key Information and Findings

• Water Pricing and Usage: Water charges in the BSA are often too low, leading to inefficient use on traditional crops with low water-use efficiency.
• Project Performance: Projects with a well-balanced mix of smallholder and entrepreneurial producers tend to perform better.
• Implementation Delays: Delays in infrastructure completion and farmer settlement negatively impact project viability.
• Private Sector Role: Private irrigation schemes, especially those using groundwater, have shown better performance and profitability.
• Intangible Benefits: Irrigation projects can reduce out-migration and improve social services in urban areas, even if their economic returns are negative.
• Recommendations:
  • Complete and upgrade existing schemes before starting new ones.
  • Improve land titles and water rights to attract credit and investment.
  • Enhance technical assistance and farmer training.
  • Focus on market studies to guide future irrigation projects.
  • Encourage private sector participation in irrigation development.

Key Projects Analyzed

Project Name	Location	Status	Key Issues
Bebedouro	Petrolina (PE)	Positive NPV and ERR	Pilot project with FAO support
Mandacaru	Juazeiro (BA)	Positive NPV and ERR	Successful due to good management and support
Tourão	Juazeiro (BA)	Positive NPV and ERR	Good integration with local markets
Curaçá	Juazeiro (BA)	Positive NPV and ERR	High productivity and profitability
Jaíba	Northern Minas Gerais (MG)	Negative NPV and ERR	Poor planning, underutilization, high costs
Morada Nova	Ceará (CE)	Negative NPV and ERR	Paternalistic approach, lack of diversification
Jaguaribe-Apodí	Ceará (CE)	Negative NPV and ERR	Delayed implementation, low utilization
Lower Assu	Rio Grande do Norte (RN)	Negative NPV and ERR	Delayed implementation, low utilization

Conclusion

The study highlights that while irrigation in the BSA has the potential to significantly boost regional development and reduce poverty, its success depends on proper planning, management, and integration with market needs. The report emphasizes the importance of technical support, farmer training, and legal frameworks in ensuring the long-term viability and impact of irrigation projects.