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• W3045839962 abstract "Estimating the conveyance efficiency of traditional irrigation schemes systems is very important. It is because of understanding the volume of water lost along with the transportation facility, enhancing water usage and productivity, hence making better decisions about the utilization of water resources. The objective of the study was to determine water abstraction permit compliances and estimate conveyance efficiency and crop and water productivity of traditional irrigation systems in northern Tanzania. The task involved measurement of irrigation water flows to determine the amount of water abstraction, inflow (head) and outflow (tail) between the canals to determine the conveyance efficiency of the main, secondary, and tertiary canals of the traditional irrigation systems. Moreover, water and yield obtained at the farm level were determined. Results indicate that approximately <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M1><mml:mn>72</mml:mn><mml:mo>%</mml:mo></mml:math> of water transported reaches the destined farm which produced maize ( Zea mays L) yields of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M2><mml:mn>1054.5</mml:mn><mml:mo> </mml:mo><mml:mrow><mml:mtext>kg</mml:mtext></mml:mrow><mml:mo>/</mml:mo><mml:mrow><mml:mtext>ha</mml:mtext></mml:mrow></mml:math>, <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M3><mml:mn>892.4</mml:mn><mml:mo> </mml:mo><mml:mrow><mml:mtext>kg</mml:mtext></mml:mrow><mml:mo>/</mml:mo><mml:mrow><mml:mtext>ha</mml:mtext></mml:mrow></mml:math>, and <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M4><mml:mn>875.156</mml:mn><mml:mo> </mml:mo><mml:mrow><mml:mtext>kg</mml:mtext></mml:mrow><mml:mo>/</mml:mo><mml:mrow><mml:mtext>ha</mml:mtext></mml:mrow></mml:math> at downstream, midstream, and upstream which equals <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M5><mml:mn>0.41</mml:mn><mml:mo> </mml:mo><mml:mrow><mml:mtext>kg</mml:mtext></mml:mrow><mml:mo>/</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mtext>m</mml:mtext></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>, <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M6><mml:mn>0.15</mml:mn><mml:mo> </mml:mo><mml:mrow><mml:mtext>kg</mml:mtext></mml:mrow><mml:mo>/</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mtext>m</mml:mtext></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>, and <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M7><mml:mn>0.09</mml:mn><mml:mo> </mml:mo><mml:mrow><mml:mtext>kg</mml:mtext></mml:mrow><mml:mo>/</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mtext>m</mml:mtext></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>, respectively, while about <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M8><mml:mn>28</mml:mn><mml:mo>%</mml:mo></mml:math> of water is lost along the canals through evaporation, seepage, and deep percolation and overtopping. Consequently, water measured at furrow intakes in total was <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M9><mml:mn>3,500</mml:mn><mml:mo> </mml:mo><mml:mtext>L</mml:mtext><mml:mo>/</mml:mo><mml:mtext>s</mml:mtext></mml:math>, equal to <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M10><mml:mn>23</mml:mn><mml:mo>%</mml:mo></mml:math> more than the permitted amount of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M11><mml:mn>2856.14</mml:mn><mml:mo> </mml:mo><mml:mtext>L</mml:mtext><mml:mo>/</mml:mo><mml:mtext>s</mml:mtext></mml:math> at Usa River Catchment. Interventions to minimize water losses starting at the furrow’s intakes are urgently required in the current trend of the increasing demand for water resources for food production and schemes performance. Subsequently, more effective conveyance technologies and water management strategies other than canal lining are required." @default.
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• W3045839962 date "2020-07-30" @default.
• W3045839962 modified "2023-10-14" @default.
• W3045839962 title "Estimating Conveyance Efficiency and Maize Productivity of Traditional Irrigation Systems in Usa River Catchment, Tanzania" @default.
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• W3045839962 doi "https://doi.org/10.1155/2020/7065238" @default.
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