Birmachu Aduna, Feyissa Tolera, Diriba Bikila
School of Hydraulic and Water Resources Engineering, Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Jimma University, P.O. Box 378, Jimma, Ethiopia.
Meteorology and Hydrology Department, College of Natural Science and Technology, Wollega University, P.O. Box 395, Nekemte, Ethiopia.
Heliyon. 2024 Aug 15;10(16):e36294. doi: 10.1016/j.heliyon.2024.e36294. eCollection 2024 Aug 30.
Quantity and quality of the water held in the reservoir fluctuates due to turbidity alterations. The influence of turbidity on the amount of the water held in a reservoir was described explicitly in this research. This study aimed to evaluate turbidity's impact on the Gilgel-Gibe I reservoir water. The samples were obtained by longitudinally stratifying the reservoir water throughout its course. Ten burrowed pools wrapped in transparent white plastic were used to retain water, for detection of the association between turbidity and surface water temperature, and to demonstrate the vertical variation in water temperature. The pan evaporation rate was measured using two Class A pans placed in the field to indicate the disparity in the amount of water evaporated from reservoir owing to reservoir turbidity variation. SPSS and MS Excel spreadsheet softwares were used to analyze the data. According to the results of this study, turbidity and water temperature have a significant direct relationship that is positive at 9:00 and 13:00 and negative at 17:00 observation hours. From the top layer of pool water to the bottom layer, the water temperature decreased vertically. Intensity of the light rays absorbed and scattered alters with turbidity variation and significant amounts of light rays was absorbed and scattered in the most turbid water. The reported water temperature differences between the top and bottom layers at 13:00 observation hour were 9.78 °C and 1.53 °C, for the most and least turbid pool water, respectively. Turbidity directly affects reservoir water by increasing both the water temperature and evaporation rates. Among all turbid-water samples, substantial quantity of water evaporated from the most turbid-water. For the most and least turbid water samples, the volume difference of the evaporated water from the reservoir was approximately 65.812 m. According to these findings, if the reservoir water turbidity increases, the amount of water held in the reservoir significantly reduced due to substantial water loss.
由于浊度变化，水库中储存的水量和水质会发生波动。本研究明确描述了浊度对水库蓄水量的影响。本研究旨在评估浊度对吉尔吉尔-吉贝一号水库水的影响。通过在水库整个流程中纵向分层采集水样。使用十个包裹着透明白色塑料的挖掘池来蓄水，以检测浊度与地表水温度之间的关联，并展示水温的垂直变化。使用放置在现场的两个A级蒸发皿测量蒸发皿蒸发率，以表明由于水库浊度变化导致的水库蒸发水量差异。使用SPSS和MS Excel电子表格软件分析数据。根据本研究结果，浊度与水温存在显著的直接关系，在9:00和13:00观测时呈正相关，在17:00观测时呈负相关。从池水中的顶层到底层，水温垂直下降。吸收和散射的光线强度随浊度变化而改变，在最浑浊的水中大量光线被吸收和散射。在13:00观测时，最浑浊和最不浑浊的池水顶层和底层之间报告的水温差异分别为9.78℃和1.53℃。浊度通过提高水温和蒸发率直接影响水库水。在所有浑浊水样中，最浑浊的水样蒸发的水量最多。对于最浑浊和最不浑浊的水样，水库蒸发水量的体积差异约为65.812立方米。根据这些发现，如果水库水浊度增加，由于大量失水，水库中的蓄水量会显著减少。
