Nuru Nade, Amin Ahmednasir, Husen Abdulaziz, Usmail Ahmed Jibril
Department of Water Resource and Irrigation Engenering, Institute of Technology, Oda Bultum University, Chiro, Ethiopia.
Departement of Natural Resource Management, College of Natural Resource and Environmental Science, Oda Bultum University, Chiro, Ethiopia.
Heliyon. 2024 Sep 20;10(19):e38123. doi: 10.1016/j.heliyon.2024.e38123. eCollection 2024 Oct 15.
This study was conducted to evaluate the overall performance of selected small-scale irrigation schemes using internal and external performance indicators. The performance of the irrigation schemes in relation to water balance was evaluated using three indicators. The results indicated that the relative water supply (RWS), relative irrigation supply (RIS), and field application ratio (FAR) of Midagdu irrigation scheme were 0.9, 1.3, and 0.75 respectively. This indicates that the water supply is not closely related to the water demand. However, for the Wadeti Irrigation scheme, the RWS, RIS, and FAR are 0.48, 0.35, and 2.83, respectively, indicating water stress. The Midagdu irrigation scheme shows 7496.75 birr/ha for both output per unit command area and output per unit cropped area. Output per unit irrigation water supply was 12.5 birr/m3, while output per unit water consumed was 4.4 birr/m3. For the Wadeti irrigation scheme, the values were 11,276.12 birr/ha, 11,276.12 birr/ha, 8.7 birr/m3, and 1.6 birr/m3, respectively. This study results showed that the Wadeti irrigation scheme is more land-efficient, while the Midagdu scheme is more water-efficient. The values of the hydraulic performance indicators Conveyance Efficiency (Ec), Water delivery capacity (WDC), and Delivery Performance Ratio (DPR), for the Midagdu irrigation scheme were 75 %, 0.45, and 0.8, respectively, while for the Wadeti irrigation scheme, the values were 42 %, 0.11, and 0.4, respectively. These results indicate that the water delivery performance of the two schemes was poor. Therefore, improving the hydraulic performance of the scheme requires minimizing water conveyance losses.
本研究旨在使用内部和外部绩效指标评估选定的小型灌溉计划的整体绩效。使用三个指标评估了灌溉计划在水平衡方面的绩效。结果表明，米达古灌溉计划的相对供水（RWS）、相对灌溉供水（RIS）和田间应用率（FAR）分别为0.9、1.3和0.75。这表明供水与用水需求没有密切关系。然而，对于瓦德蒂灌溉计划，RWS、RIS和FAR分别为0.48、0.35和2.83，表明存在水资源压力。米达古灌溉计划的单位控制面积产量和单位种植面积产量均为7496.75比尔/公顷。单位灌溉供水量的产量为12.5比尔/立方米，而单位耗水量的产量为4.4比尔/立方米。对于瓦德蒂灌溉计划，这些值分别为11276.12比尔/公顷、11276.12比尔/公顷、8.7比尔/立方米和1.6比尔/立方米。本研究结果表明，瓦德蒂灌溉计划在土地利用效率方面更高，而米达古计划在水资源利用效率方面更高。米达古灌溉计划的水力性能指标输水效率（Ec）、输水能力（WDC）和输水绩效比（DPR）的值分别为75%、0.45和0.8，而瓦德蒂灌溉计划的值分别为42%、0.11和0.4。这些结果表明，这两个计划的输水性能较差。因此，提高该计划的水力性能需要尽量减少输水损失。
