Article
Geochemistry & Geophysics
Turkan Bayer-Altin, Murat Turkes, Bekir Necati Altin
Summary: This study analyzed drought climatology and variability in the Central Anatolia Region using precipitation data and indices such as Aridity Index (AI) and Standardized Precipitation Index (SPI). Long-term trends in precipitation and indices were determined using statistical tests. It was found that the region experienced a shift from a dry sub-humid climate to a semi-arid climate in recent years. The study also identified specific areas in the region that are vulnerable to desertification.
PURE AND APPLIED GEOPHYSICS
(2023)
Article
Agronomy
Renan G. de Oliveira, Luiz Claudio G. Valle Junior, Jonh Billy da Silva, Duani A. L. F. Espindola, Rute D. Lopes, Jose S. Nogueira, Leone F. A. Curado, Thiago R. Rodrigues
Summary: This study analyzed the behavior of reference evapotranspiration and its components in relation to land use in four locations in the North of Mato Grosso state, Brazil. Trends for a 20-year period were evaluated, along with the correlation between reference evapotranspiration and other variables. Insolation was found to be the variable that most influenced the variability of ETo.
AGRICULTURAL WATER MANAGEMENT
(2021)
Article
Geosciences, Multidisciplinary
Allen G. Hunt, Muhammad Sahimi, Behzad Ghanbarian
Summary: The utilization of precipitation and the amount of runoff are key issues in hydrologic science, ecology, climate change, and geopolitics. We propose a theory for water balance that predicts changes in streamflow due to changes in temperature and precipitation. The theory incorporates a single parameter, derived under certain conditions, that is not adjustable. By comparing the theory with global data on precipitation elasticity, we find that it accurately captures the trends of median precipitation elasticity variations. Unlike the classical Budyko phenomenology, our theory yields a median precipitation elasticity value of 2 for all aridity indices greater than 1.
Article
Meteorology & Atmospheric Sciences
Dogukan Dogu Yavasli, Ecmel Erlat
Summary: Climate change can change the distribution of aridity around the world, and the Mediterranean region is particularly vulnerable to this change. However, there are few studies on aridity trends specifically focused on Turkiye and considering a comprehensive range of aridity indices and scenarios. This study aims to fill this research gap by examining future aridity trends in Turkiye under various climate change scenarios using multiple aridity indices.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2023)
Article
Agronomy
Rangjian Qiu, Longan Li, Shaozhong Kang, Chunwei Liu, Zhenchang Wang, Edward P. Cajucom, Baozhong Zhang, Evgenios Agathokleous
Summary: Two new methods were proposed to estimate the actual vapor pressure at meteorological stations, with one showing significant improvement in hyper-arid to humid regions and slightly outperforming the other method.
AGRICULTURAL AND FOREST METEOROLOGY
(2021)
Article
Meteorology & Atmospheric Sciences
Qiulin Wang, Lin Wang, Gang Huang, Jinling Piao, Chakrit Chotamonsak
Summary: The study investigates the spatial-temporal variation of the Transitional Climate Zone (TCZ) over East Asia and its response to the monsoon rainy season, finding that despite global warming, the summer evaporation in the region remains stable. There are three key patterns identified, accounting for 58.2% of the total variance, which highlights the complexity of spatial-temporal variation in TCZ. The TCZ exhibits interdecadal mutations and periodical oscillations of 3 or 8 years, with significant interannual periods and an interdecadal band of about 8 years in different parts of the region.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2021)
Article
Biodiversity Conservation
Hang Yu, Long Wang, Jianlong Zhang, Yuanfang Chen
Summary: Climate change has increased the risk of drought globally. This study developed a multi-scale global drought aridity index (GDAI) based on the principle of standardized precipitation evapotranspiration index (SPEI). The GDAI showed strong correlation coefficients with aridity index (AI) and SPEI, indicating its effectiveness in revealing global aridity and capturing temporal drought change characteristics. Additionally, the GDAI outperformed SPEI in accurately evaluating drought at a 3 month time scale.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Sciences
Reiji Kimura, Masao Moriyama
Summary: The 4D disasters in Mongolia, consisting of desertification, drought, dust, and dzud, have been on the rise and have negatively impacted human livelihoods. The study focused on analyzing trends in NDVI and SbAI to understand the increasing dryness of the Mongolian land surface, which is attributed to lower NDVI levels and relatively high aridity indices. The research also proposed a method using satellite data to monitor land-surface dryness and drought, with a focus on the strong correlation between drought and soil moisture anomalies.
Article
Meteorology & Atmospheric Sciences
Zuzana Bestakova, Filip Strnad, Mijael Rodrigo Vargas Godoy, Ujjwal Singh, Yannis Markonis, Martin Hanel, Petr Maca, Jan Kysely
Summary: This study assessed the estimation of the aridity index at different temporal scales and investigated the dry regions in Europe using three different data sets. The results show an expansion of dry regions in Europe since the late 1980s.
THEORETICAL AND APPLIED CLIMATOLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
Xiaomei Peng, Bao Yang, Shengchun Xiao, Jingjing Liu, Gang Li
Summary: By analyzing data from 43 meteorological stations in northwest China, it was found that there is a correlation between hydroclimate changes in the Mt. Qilian and the Alxa desert, particularly in terms of precipitation and relative humidity. Tree-ring records from the mountains were used to validate the faithful representation of hydroclimatic history in the desert area.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Water Resources
Umut Kirdemir, Umut Okkan, Okan Fistikoglu
Summary: The study suggests that the Gediz Basin in Turkey may experience increased temperature and potential evapotranspiration, leading to a semi-arid climate regime in the future. Unexpectedly, a sub-humid climate state may occur in some areas of the basin under the RCP8.5 scenario. The presence of semi-arid conditions is expected to become more prominent over time due to increased radiative forcing.
JOURNAL OF WATER AND CLIMATE CHANGE
(2022)
Article
Agronomy
Krzysztof Bartoszek, Alicja Baranowska, Lukasz Kukla, Barbara Skowera, Alicja Wegrzyn
Summary: Atmospheric drought is a significant issue in the Lublin region, with severity increasing due to rising temperatures and changes in precipitation patterns during the warmer months. Further research is needed to address the impact on agriculture and optimize land use in the face of worsening drought conditions.
Article
Biodiversity Conservation
Xiang Zeng, Zhongmin Hu, Anping Chen, Wenping Yuan, Guolong Hou, Daorui Han, Minqi Liang, Kai Di, Ruochen Cao, Dengnan Luo
Summary: This study provides a comprehensive assessment of the sensitivity of vegetation productivity to precipitation (S-ppt) across the global land using multiple streams of satellite observations. The results show consistent spatial patterns of S-ppt, with higher values in dry regions and lower values in humid regions. Temporally, S-ppt has generally declined over the past two decades, but with clear spatial heterogeneities. The decline in S-ppt is especially noticeable in North America and Europe, while regions like central Russia and Australia show increasing trends. Grasslands, in particular, appear to be increasingly vulnerable to climatic variability with continuing global climate change.
GLOBAL CHANGE BIOLOGY
(2022)
Article
Environmental Sciences
Ying Yao, Yanxu Liu, Yijia Wang, Bojie Fu
Summary: This study examines the vulnerability of dryland ecosystems in China to drier and wetter climates by analyzing leaf area index (LAI) data and meteorological data from two periods. The results show that a majority of China's drylands have experienced drier conditions in 2000-2016, leading to increased vulnerability and decreased resilience in these ecosystems. The study also notes that ecosystem resilience has decreased in drier conditions, especially in areas with land use change, highlighting the importance of considering ecosystem responses to climate change.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Santiago Toledo, Viviana F. Bondaruk, Laura Yahdjian, Gaston R. Onatibia, Alejandro Loydi, Juan Alberti, Martin Bruschetti, Jesus Pascual, Guadalupe Peter, Walter D. Agueero, Pedro R. Namur, Lisandro Blanco, Pablo L. Peri
Summary: This study evaluated the soil microbial characteristics under different vegetation covers along an aridity gradient and analyzed the relationships between environmental factors and microbial variables including climate, soil pH, nitrogen content, and organic carbon content.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Meteorology & Atmospheric Sciences
Sinan Sahin, Murat Turkes, Sheng-Hung Wang, David Hannah, Warren Eastwood
Article
Meteorology & Atmospheric Sciences
Yi Li, Ning Yao, Sinan Sahin, Willemijn M. Appels
THEORETICAL AND APPLIED CLIMATOLOGY
(2017)
Article
Water Resources
Sinan Sahin, H. Kerem Cigizoglu
HYDROLOGICAL PROCESSES
(2010)
Article
Engineering, Civil
Sinan Sahin, H. Kerem Cigizoglu
JOURNAL OF HYDROLOGY
(2012)
Article
Engineering, Civil
Sinan Sahin, Martin Ivanov, Murat Turkes
JOURNAL OF HYDROLOGY
(2018)
Article
Meteorology & Atmospheric Sciences
Sinan Sahin, H. Kerem Cigizoglu
THEORETICAL AND APPLIED CLIMATOLOGY
(2013)
Article
Meteorology & Atmospheric Sciences
Sinan Sahin, Murat Turkes
THEORETICAL AND APPLIED CLIMATOLOGY
(2013)
Article
Engineering, Environmental
Sinan Sahin
ENVIRONMENTAL PROCESSES-AN INTERNATIONAL JOURNAL
(2014)
Article
Engineering, Civil
Arfan Arshad, Ali Mirchi, Javier Vilcaez, Muhammad Umar Akbar, Kaveh Madani
Summary: High-resolution, continuous groundwater data is crucial for adaptive aquifer management. This study presents a predictive modeling framework that incorporates covariates and existing observations to estimate groundwater level changes. The framework outperforms other methods and provides reliable estimates for unmonitored sites. The study also examines groundwater level changes in different regions and highlights the importance of effective aquifer management.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Lihua Chen, Jie Deng, Wenzhe Yang, Hang Chen
Summary: A new grid-based distributed karst hydrological model (GDKHM) is developed to simulate streamflow in the flood-prone karst area of Southwest China. The results show that the GDKHM performs well in predicting floods and capturing the spatial variability of karst system.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Faruk Gurbuz, Avinash Mudireddy, Ricardo Mantilla, Shaoping Xiao
Summary: Machine learning algorithms have shown better performance in streamflow prediction compared to traditional hydrological models. In this study, researchers proposed a methodology to test and benchmark ML algorithms using artificial data generated by physically-based hydrological models. They found that deep learning algorithms can correctly identify the relationship between streamflow and rainfall in certain conditions, but fail to outperform traditional prediction methods in other scenarios.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Yadong Ji, Jianyu Fu, Bingjun Liu, Zeqin Huang, Xuejin Tan
Summary: This study distinguishes the uncertainty in drought projection into scenario uncertainty, model uncertainty, and internal variability uncertainty. The results show that the estimation of total uncertainty reaches a minimum in the mid-21st century and that model uncertainty is dominant in tropical regions.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Z. R. van Leeuwen, M. J. Klaar, M. W. Smith, L. E. Brown
Summary: This study quantifies the effectiveness of leaky dams in reducing flood peak magnitude using a transfer function noise modelling approach. The results show that leaky dams have a significant but highly variable impact on flood peak magnitude, and managing expectations should consider event size and type.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Zeda Yin, Yasaman Saadati, M. Hadi Amini, Linlong Bian, Beichao Hu
Summary: Combined sewer overflows pose significant threats to public health and the environment, and various strategies have been proposed to mitigate their adverse effects. Smart control strategies have gained traction due to their cost-effectiveness but face challenges in balancing precision and computational efficiency. To address this, we propose exploring machine learning models and the inversion of neural networks for more efficient CSO prediction and optimization.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Qimou Zhang, Jiacong Huang, Jing Zhang, Rui Qian, Zhen Cui, Junfeng Gao
Summary: This study developed a N-cycling model for lowland rural rivers covered by macrophytes and investigated the N imports, exports, and response to sediment dredging. The findings showed a considerable N retention ability in the study river, with significant N imports from connected rivers and surrounding polders. Sediment dredging increased particulate nitrogen resuspension and settling rates, while decreasing ammonia nitrogen release, denitrification, and macrophyte uptake rates.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Xue Li, Yingyin Zhou, Jian Sha, Man Zhang, Zhong-Liang Wang
Summary: High-resolution climate data is crucial for predicting regional climate and water environment changes. In this study, a two-step downscaling method was developed to enhance the spatial resolution of GCM data and improve the accuracy for small basins. The method combined medium-resolution climate data with high-resolution topographic data to capture spatial and temporal details. The downscaled climate data were then used to simulate the impacts of climate change on hydrology and water quality in a small basin. The results demonstrated the effectiveness of the downscaling method for spatially differentiated simulations.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Tongqing Shen, Peng Jiang, Jiahui Zhao, Xuegao Chen, Hui Lin, Bin Yang, Changhai Tan, Ying Zhang, Xinting Fu, Zhongbo Yu
Summary: This study evaluates the long-term interannual dynamics of permafrost distribution and active layer thickness on the Tibetan Plateau, and predicts future degradation trends. The results show that permafrost area has been decreasing and active layer thickness has been increasing, with an accelerated degradation observed in recent decades. This has significant implications for local water cycle processes, water ecology, and water security.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Chi Zhang, Xu Zhang, Qiuhong Tang, Deliang Chen, Jinchuan Huang, Shaohong Wu, Yubo Liu
Summary: Precipitation over the Tibetan Plateau is influenced by systems such as the Asian monsoons, the westerlies, and local circulations. The Indian monsoon, the westerlies, and local circulations are the main systems affecting precipitation over the entire Tibetan Plateau. The East Asian summer monsoon primarily affects the eastern Tibetan Plateau. The Indian monsoon has the greatest influence on precipitation in the southern and central grid cells, while the westerlies have the greatest influence on precipitation in the northern and western grid cells. Local circulations have the strongest influence on the central and eastern grid cells.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Manuel Almeida, Antonio Rodrigues, Pedro Coelho
Summary: This study aimed to improve the accuracy of Total Phosphorus export coefficient models, which are essential for water management. Four different models were applied to 27 agroforestry watersheds in the Mediterranean region. The modeling approach showed significant improvements in predicting the Total Phosphorus diffuse loads.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Yutao Wang, Haojie Yin, Ziyi Wang, Yi Li, Pingping Wang, Longfei Wang
Summary: This study investigated the distribution and transformation of dissolved organic nitrogen (DON) in riverbed sediments impacted by effluent discharge. The authors found that the spectral characteristics of dissolved organic matter (DOM) in surface water and sediment porewater could be used to predict DON variations in riverbed sediments. Random forest and extreme gradient boosting machine learning methods were employed to provide accurate predictions of DON content and properties at different depths. These findings have important implications for wastewater discharge management and river health.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Saba Mirza Alipour, Kolbjorn Engeland, Joao Leal
Summary: This study assesses the uncertainty associated with 100-year flood maps under different scenarios using Monte Carlo simulations. The findings highlight the importance of employing probabilistic approaches for accurate and secure flood maps, with the selection of probability distribution being the primary source of uncertainty in precipitation.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Janine A. de Wit, Marjolein H. J. van Huijgevoort, Jos C. van Dam, Ge A. P. H. van den Eertwegh, Dion van Deijl, Coen J. Ritsema, Ruud P. Bartholomeus
Summary: The study focuses on the hydrological consequences of controlled drainage with subirrigation (CD-SI) on groundwater level, soil moisture content, and soil water potential. The simulations show that CD-SI can improve hydrological conditions for crop growth, but the success depends on subtle differences in geohydrologic characteristics.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Constantin Seidl, Sarah Ann Wheeler, Declan Page
Summary: Water availability and quality issues will become increasingly important in the future due to climate change impacts. Managed Aquifer Recharge (MAR) is an effective water management tool, but often overlooked. This study analyzes global MAR applications and identifies the key factors for success, providing valuable insights for future design and application.
JOURNAL OF HYDROLOGY
(2024)