Rainwater harvesting for supplemental irrigation under tropical inland valley swamp conditions*

2020 ◽  
Vol 69 (5) ◽  
pp. 1095-1105
Author(s):  
Mohamed M. Blango ◽  
Richard A.C. Cooke ◽  
Juana P. Moiwo ◽  
Patrick A. Sawyerr ◽  
Emmanuel Kangoma
Keyword(s):  
Rainwater Harvesting ◽  
Supplemental Irrigation ◽  
Inland Valley

Rainwater harvesting for supplemental irrigation of onions in the southern dry lands of Ethiopia

2016 ◽  
Vol 178 ◽  
pp. 325-334 ◽  
Author(s):  
Shibeshi Assefa ◽  
Birhanu Biazin ◽  
Alemayehu Muluneh ◽  
Fantaw Yimer ◽  
Amare Haileslassie
Keyword(s):  
Rainwater Harvesting ◽  
Supplemental Irrigation ◽  
Dry Lands

scholarly journals Optimization of rainwater harvesting system design for smallholder irrigation farmers in Kenya: a review

2021 ◽  
Author(s):  
Kevin O. Odhiambo ◽  
Basil T. Iro Ong'or ◽  
Edwin K. Kanda
Keyword(s):  
Climate Change ◽  
Adverse Effects ◽  
Crop Production ◽  
Rainwater Harvesting ◽  
Smallholder Farmers ◽  
Poor Performance ◽  
Design Parameters ◽  
Negative Effects ◽  
Supplemental Irrigation ◽  
Global Food Security

Abstract The adverse effects of climate change on agriculture have been felt across the globe. Smallholder farmers in sub-Sahara Africa are particularly more vulnerable to the effects of climate change leading to loss of income and livelihood thus affecting the global food security. Rainwater Harvesting (RWH) is emerging as a viable option to mitigate the negative effects of climate change by supporting rain-fed agriculture through supplemental irrigation. However, smallholder farmers are still grappling with a myriad of challenges hindering them from reaping the benefits of their investment in RWH systems. This review explores some of the factors behind the poor performance of RWH systems in Kenya and also seeks to suggest techniques that can be applied to optimize the design parameters for improved performance and the adoption of RWH systems. According to the review, RWH has the potential to mitigate the adverse effects of climate change among smallholder farmers. It allows for crop production beyond the growing season through supplemental irrigation. However, their impacts have been minimal due to the consistent poor performance of RWH systems. This is attributed to inefficiencies in design and construction brought about by lack of required technical skills among RWH system designers and implementers. Proper design and implementation are therefore paramount for better performance and adoption of RWH systems in the region. This will ensure that RWH systems are reliable, technically and economically feasible as well as possess a desirable water-saving efficiency.

scholarly journals Potential of Deficit and Supplemental Irrigation under Climate Variability in Northern Togo, West Africa

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1803 ◽  
Author(s):  
Agossou Gadédjisso-Tossou ◽  
Tamara Avellán ◽  
Niels Schütze
Keyword(s):  
West Africa ◽  
Rainwater Harvesting ◽  
Irrigation Management ◽  
Management Strategies ◽  
Irrigation Scheduling ◽  
Dry Season ◽  
Yield Potential ◽  
Yield Response ◽  
Supplemental Irrigation ◽  
Aquacrop Model

In the context of a growing population in West Africa and frequent yield losses due to erratic rainfall, it is necessary to improve stability and productivity of agricultural production systems, e.g., by introducing and assessing the potential of alternative irrigation strategies which may be applicable in this region. For this purpose, five irrigation management strategies, ranging from no irrigation (NI) to controlled deficit irrigation (CDI) and full irrigation (FI), were evaluated concerning their impact on the inter-seasonal variability of the expected yields and improvements of the yield potential. The study was conducted on a maize crop (Zea mays L.) at a representative site in northern Togo with a hot semi-arid climate and pronounced dry and wet rainfall seasons. The OCCASION (Optimal Climate Change Adaption Strategies in Irrigation) framework was adapted and applied. It consists of: (i) a weather generator for simulating long climate time series; (ii) the AquaCrop model, which was used to simulate the irrigation system during the growing season and the yield response of maize to the considered irrigation management strategies; and (iii) a problem-specific algorithm for optimal irrigation scheduling with limited water supply. We found high variability in rainfall during the wet season which leads to considerable variability in the expected yield for rainfed conditions (NI). This variability was significantly reduced when supplemental irrigation management strategies (CDI or FI) requiring a reasonably low water demand of about 150 mm were introduced. For the dry season, it was shown that both irrigation management strategies (CDI and FI) would increase yield potential for the local variety TZEE-W up to 4.84 Mg/ha and decrease the variability of the expected yield at the same time. However, even with CDI management, more than 400 mm of water is required if irrigation would be introduced during the dry season in northern Togo. Substantial rainwater harvesting and irrigation infrastructures would be needed to achieve that.

scholarly journals The role of supplemental irrigation to crop water use under rainwater harvesting

2017 ◽  
pp. 944-955
Author(s):  
Abubaker B Ali ◽  
Li Hong ◽  
Nazar Elshaikh ◽  
Yan Haofang
Keyword(s):  
Water Use ◽  
Rainwater Harvesting ◽  
Crop Water ◽  
Supplemental Irrigation ◽  
Crop Water Use

scholarly journals Ridge–furrow–ridge Rainwater Harvesting System with Mulches and Supplemental Irrigation

HortScience ◽  
2011 ◽  
Vol 46 (1) ◽  
pp. 108-112 ◽  
Author(s):  
Borut Gosar ◽  
Dea Baričevič
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Weed Control ◽  
Rainwater Harvesting ◽  
Echinacea Purpurea ◽  
Plant Production ◽  
Plastic Mulch ◽  
Supplemental Irrigation ◽  
Growing Seasons

New ridge–furrow–ridge rainwater-harvesting (RFRRH) system with mulches has been promoted in agricultural production to improve economic potential for high-value plant production. In this system, plastic mulch covers two ridges and the furrow between them, which serves as the rainwater-harvesting zone. To test this system more effectively, a field study using purple coneflower (Echinacea purpurea Moench) as an indicator crop was conducted to determine the effect of the RFRRH system with or without a covering of two different types of polyethylene mulches and with or without supplemental irrigation on soil water content, crop yield, and time dedicated to weed control during the growing seasons of 2007 and 2008. In the non-irrigated plots, the results showed significantly higher soil water content during dry periods at the beginning of plant growth in the mulch-covered RFRRH system in comparison with the control (uncovered ridges). In comparison with the control, the mulch-covered RFRRH system significantly increased yield and reduced time dedicated to weed control. In the event of a rainfall deficiency, the mulch-covered RFRRH system enabled simple supplemental irrigation, using an agricultural vacuum tanker, by flooding the polyethylene mulch-covered furrow with hardly any ridge erosion. However, in only 1 year did supplemental irrigation significantly increase yield.

Integrating rainwater harvesting with supplemental irrigation into rain-fed spring wheat farming

2007 ◽  
Vol 93 (2) ◽  
pp. 429-437 ◽  
Author(s):  
Guoju Xiao ◽  
Qiang Zhang ◽  
Youcai Xiong ◽  
Miaozi Lin ◽  
Jing Wang
Keyword(s):  
Spring Wheat ◽  
Rainwater Harvesting ◽  
Supplemental Irrigation
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