Assessing the impact of climate change on discharge in the Horyn River basin by analyzing precipitation and temperature data

IF 0.8 Q4 WATER RESOURCES
O. Lobodzinskyi, Yevhen Vasylenko, Olha Koshkina, Y. Nabyvanets
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引用次数: 1

Abstract

It is important to investigate the hydrological consequences of current climate change. Hydrological responses to climate warming and wetter conditions include changes in discharge (frequency, amplitude, and volume). This paper describes current climate change and its impact on hydrological flow within the Horyn River basin. Daily air temperature and precipitation data obtained from the 17 meteorological stations located in and nearby the Horyn River basin, in combination with hydrological data (such as daily water discharges obtained from 9 water gauges), were used for the analysis of climate variability and its hydrological consequences. Analyses of meteorological variables and water discharges are crucial for the assessment of long-term changes in the river regime. Thiessen polygons were used to determine the area of influence of assigned specific meteorological stations, which affect the river ’ s catchments within the Horyn River basin. As a result of the trend analysis, it was observed that discharge within the Horyn River basin decreased over time. These results were congruent with the trends of precipitation data and air temperature data of the stations determined by the Thiessen polygons and basin boundaries. To understand current changes in the daily flow in the basin, changes in air temperature and precipitation for the period 1991-2020 were compared with the period of the climatic norm (1961-1990). A similar analysis was done for daily water discharges. Increasing air temperature and decreasing precipitation in the current period led to a significant decrease in discharges in the Horyn River basin, especially during the spring flood period.
通过降水和温度数据分析气候变化对霍林河流域流量的影响
研究当前气候变化的水文后果是很重要的。对气候变暖和湿润条件的水文响应包括流量的变化(频率、幅度和体积)。本文描述了当前气候变化及其对霍林河流域水文流量的影响。利用位于霍林河流域及其附近的17个气象站获得的日气温和降水数据,结合水文数据(如9个水位计获得的日水量),分析了气候变率及其水文后果。气象变量和水量的分析对于评估河情的长期变化至关重要。泰森多边形用于确定指定的特定气象站的影响范围,这些气象站影响霍林河流域内的河流集水区。趋势分析表明,随着时间的推移,霍林河流域内的流量逐渐减少。这些结果与由泰森多边形和盆地边界确定的台站降水资料和气温资料的变化趋势一致。为了了解流域日流量的变化,将1991-2020年的气温和降水变化与气候常态期(1961-1990)进行了比较。对每天的排水量也做了类似的分析。当期气温升高和降水减少导致霍林河流域流量显著减少,尤其是春洪期。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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