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The Role of On-Farm Rainwater Harvesting in Agriculture as an
Adaptation to Climate Change in KenyaLawrence Kiguro
World Vision Kenya
Rainwater harvesting is concentrating, diverting, collecting, storing, utilizing, and managing runoff for productive purposes (Ngigi, 2003).
• Subsoilers;• Zay-pits;• Sunken beds;• Bakaards and on-farm water-
pods (Silangas)
Methods of on-farm rainwater harvesting for crop production based on field experiences in
Kenya
Sub-Soilers
Help to break the hardpan and hence improve water infiltration into the soil for use by crops.
Zay-pitsThese are pits or holes that are well fertilized with deeply loosened soil, which enables intensive planting that gives high yields from a small unit area of land.
Sunken BedsThese are beds that
are well fertilized with deeply loosened soil, suitable for vegetable and especially for kitchen gardening1m wide (max) to avoid people from trampling inside the bed while working
Water-Pans (Silangas)/Small Farm Reservoir (SFR)/BaarkardsIn the drylands, road runoff shouldn’t be wasted as damages cropsRunoff should be put to good use through on-farm reservoirs. The water can then be used to irrigate using a Pendle Pump
CHALLENGES & RECOMMENDATIONS
• Tedious, costly and time consuming
• Lack of national cordination
• Inadequate Legislation
• Irrigation plays a very important role in supplying food, but the potential is limited (Falkenmark, 2001).
• Significant increases in rainfed agriculture must come from small- scale harvesting of rainwater combined with irrigation technology
On Farm Rainwater Harvesting• Is a promising technique that is
widely used throughout the world and to cope with water scarcity in agricultural production
• Has been shown to have a positive impact on agricultural production irrigating during critical growing stage of crops, hence increasing the yields.
• Helps reduce runoff and soil erosion and thus, contributes to groundwater recharge.