Your search found 6 records
(Location: IWMI-HQ Call no: P 3455 Record No: H014586)
(Location: IWMI-HQ Call no: PER Record No: H014798)
3 Tiwari, A. K.; Sharma, A. K.; Tiwari, R. K.; Bhatt, V. K. 2000. Estimation of runoff and sediment yield under different land uses in Bundelkhand Region. In Mehrotra, R.; Soni, B.; Bhatia, K. K. S. (Eds.), Integrated water resources management for sustainable development - Volume II. Roorkee, India: National Institute of Hydrology. pp.989-994.
(Location: IWMI-HQ Call no: 333.91 G000 MEH Record No: H028111)
(Location: IWMI HQ Call no: e-copy only Record No: H049898)
(0.64 MB)
An increase of cropping intensity of irrigation schemes is required to address the challenge of global food security. Socio-economic factors also have a significant impact on the cropping intensity within an irrigated area. This research is focused on understanding the impact of socio-economic factors on cropping intensity in an irrigation scheme. To assess the socio-economic factors and cropping intensity, a framework was developed, which we believe can be adopted in other irrigation schemes in developing countries. The framework was applied to an irrigation area in Nepal. An interview checklist and observation techniques were used as the primary data-gathering method, which followed the concepts articulated in the developed framework. A census survey was also conducted in 72 farmer households. The results showed that farmers' socio-economic status and their socio-cultural practices affected cropping intensity. The research also highlighted that mechanization in agricultural practices, coordination between irrigation and agricultural district offices with farmers, market facilities for agricultural inputs and agricultural products, and land tenancy agreements all significantly influenced agricultural intensification. Based on the findings of this research, an approach to intensify cropping intensity by farm owners and farming tenants has been developed, which can be applied in irrigated areas in the developing world.
(Location: IWMI HQ Call no: e-copy only Record No: H050087)
(8.87 MB) (8.87 MB)
This study assesses climate change impacts on the hydrological regime of a river basin and its implications for future irrigation water availability in the Koshi River basin using RCPs 4.5 and 8.5 over short-term (2016-2045), mid-century (2036-2065) and end-of-century (2071-2100) periods. Average flow in the Koshi River is projected to increase. Projections of average minimum monthly river flow suggest that the areas of winter wheat and monsoon paddy rice could be increased. However, the planting period of paddy rice should be delayed by one month (July to August) to capture the expected increased water availability in the river
(Location: IWMI HQ Call no: e-copy only Record No: H051485)
(4.81 MB) (4.81 MB)
The Nepalese Sunsari Morang Irrigation district is the lifeblood of millions of people in the Koshi River basin. Despite its fundamental importance to food security, little is known about the impacts of climate change on future irrigation demand and grain yields in this region. Here, we examined the impacts of climate change on the irrigation demand and grain yield of wheat crop. Climate change was simulated using Representative Concentration Pathways (RCPs) of 4.5 and 8.5 for three time horizons (2016–2045, 2036–2065, and 2071–2100) in the Agricultural Production Systems Simulator (APSIM). For the field data’s measured period (2018–2020), we showed that farmers applied only 25% of the irrigation water required to achieve the maximum potential grain yield. Actual yields were less than 50% of the potential yields. Projected irrigation water demand is likely to increase for RCP4.5 (3%) but likely to decrease under RCP8.5 (8%) due to the truncated crop duration and lower maturity biomass by the end of the 21st century. However, simulated yields declined by 20%, suggesting that even irrigation will not be enough to mitigate the severe and detrimental effects of climate change on crop production. While our results herald positive implications for irrigation demand in the region, the implications for regional food security may be dire.
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