Article
Green & Sustainable Science & Technology
Muhammad Shehzad Ashraf, Muhammad Shahid, Muhammad Waseem, Muhammad Azam, Khalil Ur Rahman
Summary: The use of hydro-climatological time series to identify patterns is crucial for understanding climate change and drought. In this study, hydrological drought variability based on the standard drought index (SDI) was investigated in the Upper Indus River Basin (UIRB) of Pakistan. The findings showed a significant decreasing trend in hydrological drought from October to March and a significant increasing trend from April to September. The IITA method was found to be reliable and effective in analyzing these trends.
Article
Water Resources
Arus Edo Harka, Nura Boru Jilo, Fiseha Behulu
Summary: The study investigated the spatio-temporal patterns and variability of rainfall in the Upper Wabe Shebelle River Basin in Ethiopia and found that high rainfall amount occurred in the wet season and high variability in the dry season. The ITA method was shown to be more robust than the MK test in detecting trends, providing valuable insights for water resource planning and management in the region.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2021)
Article
Geosciences, Multidisciplinary
Gokhan Yildirim, Ataur Rahman
Summary: This study investigates rainfall and drought characteristics in southeastern Australia using data from 45 rainfall stations. The results show an increasing trend in annual total rainfall, but a significant negative trend in the medium term. Winter is dominated by a negative trend, while summer and spring seasons show a positive trend. April is the driest month. Positive trends on droughts are observed in the inner parts of the study area, while a negative trend is detected in the south, southeast, and northeast.
Article
Environmental Sciences
Tommaso Caloiero, Roberto Coscarelli, Gaetano Pellicone
Summary: This study analyzed rainfall data in the southern Italy's Calabria region and found decreasing trends in annual and winter-autumn rainfall, as well as an increasing trend in summer rainfall.
Article
Environmental Sciences
Fatma Akcay, Bilal Bingolbali, Adem Akpinar, Murat Kankal
Summary: This study analyzed wind speed and significant wave height in coastal areas of the Black Sea using innovative trend analysis methods and compared them with traditional methods. The results showed that the innovative method was better at capturing trend changes. In most months, there was a decreasing trend in average significant wave height, and average wind speed showed a decreasing trend in the inner continental shelf of the southwestern and southeastern Black Sea.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Mohammad Arab Amiri, Milan Gocic
Summary: The analysis using the ITA method and the Mann-Kendall test on the historical precipitation changes in Serbia from 1946-2019 showed that the southwestern part of the country has the greatest increasing trend, with a noticeable gradient in precipitation trend from east to west. The ITA method was found to be more sensitive in detecting hidden trends compared to the MK trend test.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Environmental Sciences
Shahfahad, Mohd Waseem Naikoo, Swapan Talukdar, Tanmoy Das, Atiqur Rahman
Summary: This study examines the trend and pattern of rainfall in Mumbai city using rainfall regionalization approach. The results show that Mumbai has two homogeneous rainfall regions with distinctive rainfall patterns. The rainfall trend is positive but not monotonic. This study may contribute to the management of water resources and urban flood mitigation in Mumbai city.
Article
Water Resources
Musa Esit
Summary: In this study, innovative polygon trend analysis (IPTA) along with Mann-Kendall and innovative trend analysis (ITA) with significance tests were used to analyze the hydrometeorological trends in Ankara province, Turkey. The results showed that ITA and IPTA were more sensitive in capturing precipitation, temperature, relative humidity, and evapotranspiration trends compared to the MK test. The SQ-MK, CUSUM, and SNHT tests successfully detected a change in annual evapotranspiration in 2005.
JOURNAL OF WATER AND CLIMATE CHANGE
(2023)
Article
Environmental Sciences
Purnima Mehta, Mohan Singh Jangra, Satish Kumar Bhardwaj, Surender Paul
Summary: This study investigated the rainfall patterns in the mid-hills of Himachal Pradesh using trend analysis and variability analysis methods. The results showed a decreasing trend in annual rainfall, with sensitivity in monthly and seasonal variability. The study also observed an increasing trend in winter rainfall and a decreasing trend in summer, monsoon, and post-monsoon rainfall. These erratic rainfall patterns have a significant impact on cropping calendars and agricultural productivity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Meteorology & Atmospheric Sciences
Tugce Hirca, Gokcen Eryilmaz Turkkan, Majid Niazkar
Summary: This study examines historical variations of hydroclimatic variables in Eastern Black Sea Basin (EBSB) in Turkey. The Mann-Kendall (MK) and Innovative Polygon Trend Analysis (IPTA) methods were utilized to analyze 56-year precipitation data collected at 8 measuring stations. IPTA showed to be more sensitive in trend detection than MK, identifying trends in more months and stations.
THEORETICAL AND APPLIED CLIMATOLOGY
(2022)
Article
Meteorology & Atmospheric Sciences
Javed Mallick, Swapan Talukdar, Majed Alsubih, Roquia Salam, Mohd Ahmed, Nabil Ben Kahla, Md. Shamimuzzaman
Summary: The study analyzed the annual rainfall variability and trend in 30 meteorological stations in the Asir region from 1970 to 2017, showing that most stations exhibited negative trends, providing important insights for future rainfall patterns. The Modified Mann-Kendall (MMK) test was found to be the best performing technique among the MK test family, while the innovative trend analysis (ITA) was the best trend detection technique among the four techniques.
THEORETICAL AND APPLIED CLIMATOLOGY
(2021)
Article
Environmental Sciences
Shahfahad, Swapan Talukdar, Abu Reza Md Towfiqul Islam, Tanmoy Das, Mohd Waseem Naikoo, Javed Mallick, Atiqur Rahman
Summary: In this research, the trend and pattern of rainfall in Delhi metropolitan city were analyzed using rainfall regionalization approach and advanced statistical techniques. The findings reveal a slow increasing trend in rainfall from 1991 to 2018 in all rain-gauge stations of Delhi. However, none of the stations exhibited a monotonic trend in rainfall.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Meteorology & Atmospheric Sciences
R. N. Singh, Sonam Sah, Bappa Das, Sunil Potekar, Amresh Chaudhary, H. Pathak
Summary: This study analyzed the spatio-temporal trends of rainfall in different meteorological sub-divisions of India over the last 119 years. Significant increasing trends in monsoon and annual rainfall were observed in most sub-divisions, while decreasing trends were found in some areas, particularly in winter rainfall. The Innovative trend analysis (ITA) method was more sensitive in detecting hidden trends missed out by traditional methods.
THEORETICAL AND APPLIED CLIMATOLOGY
(2021)
Article
Environmental Sciences
Yilinuer Alifujiang, Jilili Abuduwaili, Yongxiao Ge
Summary: This study investigated the temporal patterns of river runoff data in the Lake Issyk-Kul basin in Central Asia and found various significant increasing and decreasing trends in different time series. The innovative trend analysis (ITA) method was effective in identifying these trends, compared to the Mann-Kendall (MK) trend test. The study revealed the seasonal variations in river runoff data and highlighted the importance of evaluating different values in analyzing trends.
Article
Meteorology & Atmospheric Sciences
Zekai Sen
Summary: In this paper, a new trend methodology is proposed based on the characteristics of crossings along any given straight line within the given time series. It does not require any restrictive assumptions and provides a series of trends at different levels within the variation range of the time series. The methodology is compared with a classical trend determination method and applied to data from the Danube River and Turkey.
THEORETICAL AND APPLIED CLIMATOLOGY
(2022)
Article
Geochemistry & Geophysics
Hui Jia, Ken Howard, Hui Qian
APPLIED GEOCHEMISTRY
(2020)
Article
Geochemistry & Geophysics
Panpan Xu, Qiying Zhang, Hui Qian, Wengang Qu
Article
Environmental Sciences
Xinyan Li, Hao Wu, Hui Qian
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Environmental Sciences
Haike Wang, Hui Qian, Yanyan Gao
Summary: The study established a macropore structure model of loess using X-ray CT technology, revealing anisotropic pore variation. By modifying equations, the anisotropy of hydraulic conductivity was investigated, and the results were verified through permeability tests.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Green & Sustainable Science & Technology
Jie Chen, Yanyan Gao, Hui Qian, Hui Jia, Qiying Zhang
Summary: Water sustainability is crucial for socio-economic development. The study identified a decline in the total grey water footprint (GWF) for Yinchuan City, with stable contributions from agricultural GWF. Economic development and technology effects were key factors behind the GWF decline.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Zhongbo Su, Yaoming Ma, Xuelong Chen, Xiaohua Dong, Junping Du, Cunbo Han, Yanbo He, Jan G. Hofste, Maoshan Li, Mengna Li, Shaoning Lv, Weiqiang Ma, Maria J. Polo, Jian Peng, Hui Qian, Jose Sobrino, Rogier Van der Velde, Jun Wen, Binbin Wang, Xin Wang, Lianyu Yu, Pei Zhang, Hong Zhao, Han Zheng, Donghai Zheng, Lei Zhong, Yijian Zeng
Summary: A better understanding of water and energy cycles in the Third Pole Environment is crucial for assessing changes in cryosphere and hydrosphere, as well as predicting water resource changes in South and East Asia. This paper presents results from in situ observations, microwave radiometry modeling, terrestrial evapotranspiration analysis, soil moisture comparison, water vapor transport trajectory analysis, and vertical water vapor exchange in different seasons. These findings contribute to a comprehensive understanding and prediction of water resources in the Tibetan Plateau and surrounding regions.
Article
Green & Sustainable Science & Technology
Yanyan Gao, Hui Qian, Yahong Zhou, Jie Chen, Haike Wang, Wenhao Ren, Wengang Qu
Summary: Intense anthropogenic activities have led to deterioration of groundwater quality worldwide. Scientific assessments of groundwater quality and human health risks are crucial. This study comprehensively assessed the groundwater quality and potential risks of As, F-, NO3-N, and Cr6+ in the Guanzhong Basin. Results showed spatial variability in groundwater composition and identified Cr6+, As, NO3-N, and F- as the main contaminants. The study also highlighted the high risks faced by residents in the north of the basin and the importance of considering the geological background and irrigation activities.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Panpan Xu, Hui Qian, Jie Chen, Lingbo Wang, Xayda Abliz, Xiaoqiang He, Gaoxiang Ma, Yuan Liu
Summary: The effect of compaction on the microstructure of compacted loess was investigated using SEM and MIP. The results showed that the loess microstructure evolved from overhead weak to interlocking semi-cementation and then to dispersion-strong cementation as compaction degree increased. The pore characteristics transformed from macropores to mesopores and then to small pores. The MIP test indicated that the compaction of loess was mainly caused by compression of the intragranular pores.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Weiqing Li, Hui Qian, Panpan Xu, Kai Hou, Qiying Zhang, Yao Chen, Jie Chen, Wengang Qu, Wenhao Ren
Summary: Geochemical investigations of fluvial sediment in the Yellow River reveal the provenance, weathering and sedimentary recycling characteristics. The study finds that the surface sediment of the Yellow River has undergone a low intensity of weathering and recycling overall, but significant differences exist among the upper, middle, and lower reaches due to varying climatic conditions and tectonic settings. The source rocks exhibit a mixed type composition, consisting of felsic igneous rocks, intermediate igneous rocks, quartzose sedimentary rocks, and mafic components. These findings provide valuable insights into the paleoclimatic and paleoenvironmental changes in large watersheds in arid and semi-arid areas.
Article
Environmental Sciences
Qiying Zhang, Hui Qian, Panpan Xu, Rui Liu, Xianmin Ke, Alex Furman, Jiatao Shang
Summary: The increasing demand for agricultural water in irrigated regions, especially in arid and semi-arid areas, poses a serious problem. Changes in groundwater levels can have adverse effects on surface water flow and the sustainability of water resources and ecosystems. In this study, a two-dimensional unsteady flow model was used to evaluate the demand for agricultural water in the Jiaokou Irrigation District. The results showed that while groundwater in the study area is relatively balanced, there is insufficient supply of irrigation water during summer. Different scenarios were tested, and the one based on the Hanjiang-to-Weihe River Valley Water Diversion Project was found to be the most reasonable and sustainable.
Article
Environmental Sciences
Yuting Zhang, Kai Hou, Hui Qian, Yanyan Gao, Yuan Fang, Shunqi Tang, Shan Xiao, Wenhao Ren, Wengang Qu, Qiying Zhang
Summary: This study identified the natural-human driving factors of groundwater salinization in the Yinchuan Plain using isotope analysis, information entropy, and self-organizing map. The study found that groundwater in the area is seriously salinized with spatial heterogeneity. Multiple natural conditions and human activities contribute to the complexity of groundwater salinization. The study also proposed management initiatives prioritizing dredging and maintaining a healthy soil and groundwater environment in irrigated areas.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Civil
Panpan Xu, Hui Qian, Weiqing Li, Wenhao Ren, Faxuan Yang, Lingbo Wang
Summary: Heavy metal contamination in loess soil has a significant impact on its seepage behavior, with Cu2+ and Zn2+ having contrasting effects. Zn2+ promotes leaching, transforms small pores to mesopores, and increases the saturated hydraulic conductivity (Ksat) of contaminated loess. Conversely, Cu2+ inhibits pore enlargement and reduces the effective connectivity of pores, resulting in a decrease in Ksat. Understanding the underlying geochemical mechanisms of these behaviors is crucial for geotechnical engineering projects in regions with loess soil.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Wenhao Ren, Yanyan Gao, Hui Qian, Yaoming Ma, Zhongbo Su, Weiqiang Ma, Yu Liu, Panpan Xu
Summary: This study used GRACE and GLDAS data to analyze the changes in groundwater storage in the Tibetan Plateau. The results showed that the groundwater storage in the Tibetan Plateau is decreasing overall but has gradually recovered since 2016. The study also found that climate change has a significant influence on groundwater storage, with decreased precipitation and increasing temperatures leading to a decrease in groundwater storage, while regions with glacier distribution experience an increase in groundwater storage due to rising temperatures. These changes have important implications for the ecosystem, as a decrease in groundwater storage leads to insufficient water for vegetation, resulting in grassland degradation, while an increase in groundwater storage promotes vegetation restoration. The findings of this study are of great significance for understanding groundwater changes in cryosphere regions and assessing the impact of hydrological conditions on ecology.
Article
Engineering, Civil
Mengna Li, Hui Qian, Maciek W. Lubczynski, Panpan Xu, Zhongbo Su, Yijian Zeng, Jie Chen, Kai Hou, Qiying Zhang
Summary: This study investigates the hydrogeochemical composition and stable isotopes (δD and δ18O) of surface water and groundwater in the Maqu catchment. The results show that both the surface water and groundwater are of meteoric origin and there is close contact between them. The study concludes that the Maqu catchment is an important carbon sink in the Yellow River Basin.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Civil
Weiqing Li, Hui Qian, Panpan Xu, Kai Hou, Qiying Zhang, Wengang Qu, Wenhao Ren, Yao Chen
Summary: This study used EMMA, MDS, and PCA to identify sedimentary characteristics, provenance, and transport of sediments in the Yellow River Basin and analyze aeolian-fluvial interactions. Sediments in the source area came from the Tibetan Plateau, while those in the lower reaches came from the Chinese Loess Plateau (CLP). Sediment transport was controlled by simultaneous or alternating aeolian and fluvial processes. The study has implications for paleoclimatic reconstruction and soil and water conservation.
JOURNAL OF HYDROLOGY
(2023)
