Improvement of irrigation facilities through groundwater development, Philippines. Guimba irrigation development project. V. 5. Annex 4: Irrigation, design and operation - Technical report 2/4

carreteras conception costo estimado costos costs design drainage drenaje eau souterraine entretien estimated costs estudios de factibilidad feasibility studies groundwater irrigation irrigation systems maintenance mantenimiento pozos puits ressource en eau riego roads route sistemas de riego water resources wells