GIS-based land suitability assessment for surface irrigation: a case of Gilgel Gibe watershed, Jimma Zone, Ethiopia

Akalu, Mahmud Mustefa

doi:10.1007/s12517-022-09669-0

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…Highly appropriate (S1), mildly appropriate (S2), mildly appropriate (S3), and presently not appropriate (N) were the four categories used to classify irrigation land suitability. In [56] Using Remote Sensing (RS) and GIS techniques, analyze land surface water availability and suitability for surface irrigation in the Gilgel Gibe watershed. The availability of surface water was assessed by creating a flow duration curve (FDC), and assessing the Gilgel Gibe River's 90% available flow.…”

Section: A Surface Irrigation Systemmentioning

confidence: 99%

Smart Irrigation Systems: Overview

et al. 2024

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Countries are collaborating to make agriculture more efficient by combining new technologies to improve its procedure. Improving irrigation efficiency in agriculture is thus critical for the survival of sustainable agricultural production. Smart irrigation methods can enhance irrigation efficiency, specially with the introduction of wireless communication systems, monitoring devices, and enhanced control techniques for efficient irrigation scheduling. The study compared on a wide range of study subjects to investigate scientific approaches for smart irrigation. As a result, this project included a wide range of topics related to irrigation methods, decision-making, and technology used. Information was gathered from a variety of scientific papers. So, our research relied on several published documents, the majority of which were published during the last four years, and authors from all over the world. In the meantime, various irrigation initiatives were given special attention. Following that, the evaluation focuses on the key components of smart irrigation, such as real-time irrigation scheduling, IoT, the importance of an internet connection, smart sensing, and energy harvesting.INDEX TERMS Smart irrigation, Soil monitoring, Smart agriculture, IoT, Energy harvesting.• Pressurized distribution: The pressurized systems'main components are a trickle, sprinkler, and array of the same systems, where water is carried and spread along the land surface within networks of pressurized pipes. Besides, many individual systems configurations are presented by novel features, such as centre-pivot sprinkler systems. • Gravity-flow distribution: Systems based on gravityflow carry and distribute the water at the field level through the overland, free-surface flow regime. These mentioned surface irrigation methods are split based on the operational specifications and configuration. • Drainage flow distribution: An irrigation system using drainage control-sub-irrigation is not commonly used.

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Section: A Surface Irrigation Systemmentioning

confidence: 99%

Smart Irrigation Systems: Overview

et al. 2024

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“…The Gilge Gibe catchment, located in the Omo Gibe basin, is facing a number of challenges due to rapid population growth, expansion of cultivation lands, and urban expansion within the catchment [ 30 ]. These factors have led to unprecedented impacts on the catchment, exacerbating the high demand for water resources due to socio-economic progress and increasing demand for cultivation [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

The impacts of climate change on hydrological processes of Gilgel Gibe catchment, southwest Ethiopia

Tilahun,

Bizuneh,

Mekonnen

2023

PLoS ONE

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Climate change is a significant driver of water resource availability, affecting the magnitude of surface runoff, aquifer recharge, and river flows. This study investigated the impact of climate change on hydrological processes within the Gilgel Gibe catchment and aimed to determine the level of exposure of water resources to these changes, which is essential for future adaptability planning. To achieve this objective, an ensemble mean of six regional climate models (RCMs) from the coordinated regional climate downscaling experiment (CORDEX)-Africa was used to simulate future climatic scenarios. The RCMs outputs were then bias corrected using distribution mapping to match observed precipitation and temperature. The Soil and Water Assessment Tool (SWAT) model was used to assess the hydrological impacts of climate change on the catchment. The results indicated that the ensemble mean of the six RCMs projects a decline in precipitation and an increase in temperature under both the RCP4.5 and RCP8.5 representative concentration pathways. Moreover, the increases in both maximum and minimum temperatures are higher for higher emission scenarios, indicating that RCP8.5 is warmer than RCP4.5. The projected climate change shows a decrease in surface runoff, groundwater, and water yield, resulting in an overall decline of annual flow. This decline is mainly due to the reduction in seasonal flows driven by climate change scenarios. The changes in precipitation range from -11.2% to -14.3% under RCP4.5 and from -9.2% to -10.0% under RCP8.5, while the changes in temperature range from 1.7°C to 2.5°C under RCP4.5 and from 1.8°C to 3.6°C under RCP8.5. These changes could lead to reduced water availability for crop production, which could be a chronic issue for subsistence agriculture. Additionally, the reduction of surface water and groundwater could further exacerbate water stress in the downstream areas, affecting the availability of water resources in the catchment. Furthermore, the increasing demands for water, driven by population growth and socioeconomic progress, along with the variability in temperature and evaporation demands, will amplify prolonged water scarcity. Therefore, robust climate-resilient water management policies are indispensable to manage these risks. In conclusion, this study highlights the importance of considering the impact of climate change on hydrological processes and the need for proactive adaptation measures to mitigate the impacts of climate change on water resources.

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