17. Map areas of erosion risk. Terrestrial ecosystems. 1,000,000. 18. Implement water-harvesting system in drought-prone areas. Agriculture and food security. Water resources. 3,000,000. 19. Improve knowledge of hydrology. Water resources. 2,000,000. 20. Extend water and sanitation network to rural areas. Water resources. Infrastructure. 10,000,000. 21. Explore industrial opportunities from climate change. 1,000,000. 22. Monitor groundwater. Water resources. 3,000,000. 23. Construct flood protection barriers along major rivers. Water resources. Disaster risk management. 5,000,000. 24.