埃塞俄比亚Gilgel Gibe流域水文气象资料趋势分析

IF 2.1 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES
Zeinu Ahmed Rabba
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引用次数: 0

摘要

水文气象数据的趋势分析对于合理规划和管理水资源至关重要。本文探讨了吉尔吉尔集水区水文气象资料的变化趋势及其是否显著。收集集水区内外(附近)站点(7个降雨量站点、4个温度站点、6个流量站点)25年以上的日降雨量、气温和流量数据,分析其变率和趋势变化。在进行趋势测试之前,对缺失的数据进行了填充,并对其不一致性进行了调整。采用非参数Mann-Kendall检验和Sen斜率技术来检测数据序列的单调趋势。结果表明,平均而言,降雨量呈不显著的增加趋势。还观察到,总的来说,研究地区的温度(最高和最低温度)都有上升的趋势。径流分析表明,只有一个站点(Bulbul Nr. Serbo)在5%的显著水平上呈现正斜率。2个站点(Aweitu Nr. Babu和Gibe Nr. Seka)呈轻微上升趋势,其余3个站点(Gibe Nr. Assendabo、Aweitu at Jimma和Kitto Nr. Jimma)呈不显著下降趋势。汇水口的流量总体上呈每年0.007%的微小下降趋势。但总体而言,研究流域水文气象资料的趋势变化在统计上不显著。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Trend Analysis of Hydrometeorological Data of Gilgel Gibe Catchment, Ethiopia
Trend analysis of hydrometeorological data is vital for proper water resources planning and management. This paper examines the trends of the hydrometeorological data in Gilgel Gibe catchment and whether the trends are significant. Daily rainfall, temperature, and streamflow data of the stations in/around (nearby) the catchment (7 stations for rainfall, 4 stations for temperatures, and 6 stations for streamflow) for a period longer than 25 years were collected and then analyzed to detect the variability and the changes in trend. Prior to conducting trend tests, the missed data were filled, and their inconsistencies were also adjusted. The nonparametric Mann-Kendall test along with Sen’s slope technique was employed to detect monotonic trends in the data series. The results showed that, on average, the rainfall exhibits an insignificant increasing tendency. It was also observed that there is, in general, an increasing trend in temperature (both maximum and minimum) in the study area. The analysis of the stream flows indicated that only one station (Bulbul Nr. Serbo) showed a positive slope at a 5% significance level. Two stations (Aweitu Nr. Babu and Gibe Nr. Seka) showed a slightly increasing trend, whereas the remaining 3 stations (Gibe Nr. Assendabo, Aweitu at Jimma, and Kitto Nr. Jimma) indicated an insignificant decreasing trend. The streamflow of the catchment generally shows a tiny decreasing tendency (0.007% per year) at its outlet. However, the results in general specified statistically insignificant trend changes of the hydrometrological data of the study catchment.
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来源期刊
Advances in Meteorology
Advances in Meteorology 地学天文-气象与大气科学
CiteScore
5.30
自引率
3.40%
发文量
80
审稿时长
>12 weeks
期刊介绍: Advances in Meteorology is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles in all areas of meteorology and climatology. Topics covered include, but are not limited to, forecasting techniques and applications, meteorological modeling, data analysis, atmospheric chemistry and physics, climate change, satellite meteorology, marine meteorology, and forest meteorology.
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