Implement water resources integrated management. Water resources. Water management. 3,000,000. 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.