This study investigated the effectiveness of suspended shade covers in reducing evaporation rates and improving evaporation suppression efficiency. The experiment tested different shading colors (black, white, and green) and intensities (50, 70, and 90%) while considering ecological and economical aspects. Evaporation was determined using class-A evaporation pans, and various microclimatic variables were measured below the shade covers. Additionally, water quality parameters such as EC, phosphate, nitrate, and chloride concentrations were monitored. The results showed that black covers had the highest evaporation suppression efficiency with values of 56.8, 53.6, and 51.7% observed under 90% shading intensity for the black, green, and white covers, respectively. Despite variations in water quality parameters which all met Jordanian and FAO standards for irrigation water, the economic feasibility of installing these covers was found to be viable due to the resulting benefits in water conservation and crop production. However, selecting the best shading cover should consider the multipurpose use of agricultural reservoirs, including aquaculture, and further studies are recommended to investigate other overlapping aspects on a reservoir scale.

这项研究调查了悬挂遮阳罩在降低蒸发速率和提高蒸发抑制效率方面的有效性。该实验测试了不同的着色颜色（黑色、白色和绿色）和强度（50%、70% 和 90%），同时考虑了生态和经济方面。使用 A 级蒸发盘测定蒸发量，并在遮阳罩下方测量各种微气候变量。此外，还监测 EC、磷酸盐、硝酸盐和氯化物浓度等水质参数。结果表明，黑色覆盖物的蒸发抑制效率最高，在90%遮光强度下，黑色覆盖物、绿色覆盖物和白色覆盖物的蒸发抑制效率分别为56.8%、53.6%和51.7%。尽管水质参数存在差异，但均符合约旦和粮农组织的灌溉用水标准，但安装这些覆盖物的经济可行性被认为是可行的，因为它可以带来节水和作物生产的效益。然而，选择最佳遮阳覆盖应考虑农业水库的多用途，包括水产养殖，建议进一步研究水库规模的其他重叠方面。