Spatial and Temporal Analysis of Rainfall and Drought Condition in Southwest Xinjiang in Northwest China, Using Various Climate Indices

Khan, Ahmad Ali; Zhao, Yu; Khan, Jamil; Rahman, Ghani; Rafiq, Muhammad; Moazzam, Muhammad Farhan Ul

doi:10.1007/s41748-021-00226-5

Cited by 32 publications

(24 citation statements)

References 31 publications

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“…According to the Korean climate change and drought survey report, Korea faced drought events in 1981-1982, 1994-1995, 2001-2007, and 2014-2015, which was also reflected in this study using SPI and SPEI for 1982, 1988, 1994, 2001, 2008-2015. Almost the same years of drought have been detected in other studies conducted in the Asian region [4,11]. Hong et al, (2016) [23] discussed the 2014-2015 drought as the worst in the history of South Korea in which annual rainfall decreased 35-50% from its normal, and the same years were detected as severe to extreme drought in this study for six out of a total of nine provinces in South Korea in the results of the 12-month SPI and SPEI.…”

Section: Discussionsupporting

confidence: 83%

“…Drought is one of the most frequently occurring and severe hydrometeorological phenomena, resulting from a decrease in rainfall from normal conditions, causing water scarcity for various water-dependent activities [1,2]. Drought is a costly and destructive hazard with an extensive impact on the environment, socioeconomics, and populations around the globe [3,4]. Due to the shift in climatological patterns (rainfall and temperature), droughts are occurring more frequently [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal Rainfall Variability and Drought Assessment during Past Five Decades in South Korea Using SPI and SPEI

et al. 2022

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About 41% of the earth is drought-affected, which has impacted nearly 2 billion people, and it is expected that more than 90% of terrestrial areas will be degraded by 2050. To evade and mitigate the harmful impacts of drought, it is necessary to study the rainfall variability and assess the drought trend at a global and regional level. This study utilized 70 meteorological stations in South Korea to evaluate the rainfall variability, drought, and its trend during the past five decades using the standardized precipitation evapotranspiration index (SPEI) and the standardized precipitation index (SPI). Rainfall data normality was assessed with mean, standard deviation, skewness, and kurtosis. The highest amount of rainfall was observed in the months of June, July, and August. The SPI and SPEI 12-month results revealed that 1982, 1988, 2008, 2015, and 2017 were dry years throughout the country, while from 2013 to 2017 mixed drought events were observed for the 6-month time series. The Mann-Kendall trend test was applied to the 1- and 12-month time series, and the results revealed that the months of January, March, April, May, June, and August had a significant negative trend, which means drought is increasing in these months, while the months of September, October, and December had a significant positive trend, which means wetter conditions prevailed in these months during the study period. It was observed in the 12-month time series that only two met stations had a significant negative trend, while only one had a significant positive trend. It was found that January and March were the driest months, and October was the wettest month. The detected drought events in this research are consistent with ENSO events. We have observed differences in drought characteristics (duration and frequency) for both indices. Climatic data revealed that South Korea has faced drought conditions (rainfall deficit) due to a shortened monsoon season. This study can provide guidance on water management strategies under the changing pattern of drought in South Korea.

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Section: Discussionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Rainfall Variability and Drought Assessment during Past Five Decades in South Korea Using SPI and SPEI

et al. 2022

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“…In recent years, global warming and climate change have been changing the human lifestyle and have also had a profound impact on the global economy, ecological environment and groundwater resources (Pandey et al 2020;Khan et al 2021;Valipour et al 2021). The carbon emissions caused by the large consumption of traditional petrochemical energy sources is one of the most critical factors.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the water–rock interaction mechanism in a groundwater heat pump reinjection process

Yang

Tao

Gao

et al. 2022

Journal of Water and Climate Change

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Groundwater heat pump (GWHP) is a clean new energy technology. However, recharge clogging has always affected the operation efficiency of GWHP systems. The mechanism of the water–rock interaction induced the chemical blockage of aquifers is especially not clear enough. In this study, a sand column device was designed to simulate the recharge of GWHP, the geothermal water and aquifer sand of the actual GWHP project were collected. Moreover, we have characterized the sand using SEM-EDS, XRD and FT-IR; meanwhile, the evolution of the hydrochemical components, the relationship between TDS and mineral dissolution and the concentration variation trend of [Na+ + K+] and [Mg2+ + Ca2+] were analysed. The results showed that the maximum reduction of the albite content in the column, except for P4 and P6, was 13.97%, while the calcite content in the P3–P4 and P7–P10 segments increased by 1.2%. The anhydrite content was reduced in the whole interval. Therefore, the precipitation and dissolution of minerals might occur in the process of recharge, which was more significant in the front of the column. In addition, the water–rock reaction induced by GWHP recharge is a process that also involves the cation exchange adsorption of Na+ with Mg2+ and Ca2+.

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“…Climate change can also impact the vegetation (Berdimbetov et al 2021). In Xinjiang, climate change leads to reduced rainfall, which ultimately exacerbates the survival of endangered plants (Khan et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Climate change impact on extreme value and its frequency distribution function in a karst basin, Southwest China

Song

Ruan

et al. 2022

Journal of Water and Climate Change

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Studying extreme meteorology and its frequency under climate change is helpful to guide flood and drought control. The original achievements and objective of this study are to further contribute to the literature on how to analyze the impact of climate change on extreme rainfall and extreme temperature more reasonably and comprehensively for a karst basin. The Mann–Kendall method, Heuristic segmentation method, cross-wavelet analysis method, generalized extreme value (GEV) model, and generalized Pareto distribution (GPD) model were applied in this paper. The 55-year (1963–2017) extreme rainfall and temperature data recorded in the Chengbi River Basin were applied. The results show that extreme rainfall showed a downward trend (−0.169 and −8.735 mm/10a), while the trends of extreme temperatures were not obvious (Sen's slope estimate is 0). The mutation points range from 1981 to 2002 and the mutation point of extreme rainfall series is earlier than that of extreme temperatures. Compared with the GEV model, the parameters of the GPD model show a smaller variation before and after climate change, and the extreme meteorology values corresponding to the same recurrence period show a decreasing trend after climate change. The performance of GEV and GPD models after climate change is generally more fit than that before climate change.

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Spatial and Temporal Analysis of Rainfall and Drought Condition in Southwest Xinjiang in Northwest China, Using Various Climate Indices

Cited by 32 publications

References 31 publications

Spatiotemporal Rainfall Variability and Drought Assessment during Past Five Decades in South Korea Using SPI and SPEI

Spatiotemporal Rainfall Variability and Drought Assessment during Past Five Decades in South Korea Using SPI and SPEI

Experimental study on the water–rock interaction mechanism in a groundwater heat pump reinjection process

Climate change impact on extreme value and its frequency distribution function in a karst basin, Southwest China

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