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Climate change and its influence on the Karst groundwater recharge in the Jinci Spring Region, Northern China

机译:中国北方晋祠泉区气候变化及其对喀斯特地下水补给的影响

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摘要

Due to climate change and human activities over the last fifty years, the spring flowvolume of karst groundwater has sharply diminished in China. Climate change is one of the criticalfactors that initiates a series of karst hydrogeologic and water ecological environmental problems,because the precipitation shows a decreasing trend while the temperature shows an increasing trend.The Jinci Spring is one of the largest, most famous springs in northern China. This study employeddata from the Taiyuan Meteorological Station and ten precipitation stations in and around the JinciSpring region as well as the runoff data gathered from two hydrological monitoring stations during1960-2012. The sliding average method and the Mann-Kendall test were used to analyze the variationtendency of precipitation, temperature, and land evaporation in this area. Finally, the followingwere calculated: the varying pattern of the karst groundwater recharge amount and the responseof the recharge amount to precipitation, land evaporation, and river runoff by quantitative analysis.The results indicated that the precipitation and land evaporation amount decreased at first and thensubsequently increased. Likewise, the variation trend of the karst groundwater recharge amountin the spring region was roughly consistent with the precipitation variation pattern. In contrast,the temperature displayed an increasing trend. The climate change resulted in a reduction of thekarst groundwater recharge amount, and it had the greatest influence in the 1990s, which caused thekarst groundwater recharge amount to decrease 26.75 mm as compared to that of the 1960s (about39.68% lower than that of the 1960s). The Jinci Spring had zero flow during this period. The reductionin precipitation was one of main factors that caused the cutoff of the Jinci Spring.
机译:由于过去五十年来的气候变化和人类活动,中国岩溶地下水的春季流量急剧减少。气候变化是引发一系列喀斯特水文地质和水生态环境问题的关键因素之一,因为降水呈下降趋势而温度呈上升趋势。晋ci泉是中国北方最大,最著名的泉之一。 。这项研究采用了太原气象站和晋Spring泉地区及其周围的十个降水站的数据,以及从1960-2012年从两个水文监测站收集的径流数据。利用滑动平均法和Mann-Kendall检验分析了该地区降水,温度和土地蒸发的变化趋势。最后,通过定量分析计算得出:喀斯特地下水补给量的变化模式以及补给量对降水,土地蒸发和河流径流的响应,结果表明,降水和土地蒸发量先减少后增加。 。同样,春季地区喀斯特地下水补给量的变化趋势与降水变化规律基本一致。相反,温度显示出上升趋势。气候变化导致喀斯特地下水补给量减少,并且在1990年代影响最大,这导致喀斯特地下水补给量与1960年代相比减少了26.75毫米(比3960年下降了约39.68%)。 1960年代)。晋ci泉在此期间流量为零。降水减少是造成晋ci泉断流的主要因素之一。

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