Article
Environmental Sciences
Camila Bergmann Goulart, Tobias Bleninger, Hugo de Oliveira Fagundes, Fernando Mainardi Fan
Summary: The construction of dams or barrages can affect the watercourse and the retention of sediment from the river, causing siltation of the reservoir and obstruction of water intakes. However, there is limited information on sediment management, transport equations, and parameters associated with numerical modeling of sediment management. This study evaluates the effects of different parameters on sediment management in reservoirs and highlights the importance of proper estimation of model parameters for accurate predictions.
INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
(2023)
Article
Environmental Sciences
Markus Reisenbuechler, Minh Duc Bui, Peter Rutschmann
Summary: Reservoir sedimentation is a global issue affecting storage capacity and efficiency, with drawdown flushing as a management tool that should be optimized for effectiveness. This study proposes an innovative predictive model based on artificial neural networks for sediment volume removal, with potential applications as a decision-support system for hydropower operators in real-world scenarios.
Article
Engineering, Multidisciplinary
Yining Sun, Ji Li, Zhixian Cao, Jinxin Liu, Huan Xu, Alistair G. L. Borthwick
Summary: This study presents an integrated model to address the problem of sediment flushing through a bottom tunnel intake in a reservoir. The model couples two-dimensional and one-dimensional models and uses numerical flux calculations for solving the governing equations. The model is tested against physical experiments and successfully predicts the occurrence of tunnel blockage. Its application facilitates reservoir design and operation to help preserve reservoir capacity.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Geosciences, Multidisciplinary
Alberto J. Alaniz, Ana M. Abarzua, Alejandra Martel-Cea, Leonora Jarpa, Marjorie Hernandez, Marco A. Aquino-Lopez, Cecilia Smith-Ramirez
Summary: Soil loss in the Lanalhue lake basin in central Chile has been studied, revealing high and constant erosion rates, especially in clear-cutting areas and exotic forest plantations. Industrial forestry is identified as the main activity affecting erosion dynamics in the basin, while earthquakes have also played a significant role in sediment dynamics over the past 120 years.
Article
Geosciences, Multidisciplinary
Shi Ren, Bangwen Zhang, Wei-Jie Wang, Yuan Yuan, Chao Guo
Summary: Through measures like upstream sediment trapping and sediment peak regulation, the incoming sediment load of TGR has been significantly reduced, successfully addressing sedimentation issues and providing valuable lessons for reservoir management elsewhere.
Article
Environmental Sciences
Sebastian Guillen-Ludena, Jorge A. Toapaxi, Luis G. Castillo
Summary: This paper presents a systematic analysis of the hydraulic flushing capacity of a stored volume of water to remove sediments. The results show that the efficacy of flushing increases with higher initial slope and decreases with larger initial volume of water. The sediment size also affects the flushing efficacy, with fine sand being impacted by apparent cohesion in the mobile bed.
Article
Environmental Sciences
Klajdi Sotiri, Stephan Hilgert, Michael Mannich, Tobias Bleninger, Stephan Fuchs
Summary: Siltation directly reduces the usable water amount in reservoirs, posing a significant challenge in the 21st century. Assessing sediment volume and distribution accurately requires considering multiple measurement techniques.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Civil
Huan Xu, Zhixian Cao, Qing Wang
Summary: Sediment flushing through a bottom tunnel can alleviate sedimentation and its negative impacts, but it is unclear whether it can be achieved once the intake is covered by sediment deposits. Flume experiments were conducted to investigate the threshold conditions for sediment flushing. The results showed that higher water level, smaller cover layer thickness, shorter tunnel length, and steeper tunnel slope favor sediment flushing.
JOURNAL OF HYDRAULIC ENGINEERING
(2023)
Article
Ecology
Nasrin Nikafkar, Younos Vakil Alroaia, Seyyed Abdollah Heydariyeh, Anton J. Schleiss
Summary: Improper use of chemical fertilizers has led to land degradation. Organic crops, farmed using organic fertilizers, are considered an alternative solution to develop the ecosystem health and improve the soil. This research aimed to study the feasibility of reusing dam reservoir sediments as organic fertilizers to revitalize agricultural soil on a commercial scale.
ECOLOGICAL ECONOMICS
(2023)
Review
Environmental Sciences
Mathias Kondolf, Jaeeung Yi
Summary: Dams are important to society but have significant environmental impacts. Sedimentation poses a threat to the sustainability of reservoir storage. Dam renovation, including structural retrofits, fishway retrofits, reservoir reoperation, and sustainable sediment management, is crucial to address environmental concerns and ensure dam sustainability. Dam removal, although discussed frequently, is not a practical solution for most dams.
Article
Engineering, Civil
Bangwen Zhang, Baosheng Wu, Ruoyin Zhang, Shi Ren, Minhui Li
Summary: The study focused on the asynchronous propagation characteristics of flood and sediment peaks downstream in the Three Gorges Reservoir (TGR) by using a 3D numerical model. The model accurately reproduced the processes of flood propagation and sediment transport during the 2013 flood season, with the horizontal grid having a greater influence on the results than the vertical grid. The impounded level in the TGR had a significant impact on the occurrence time and magnitude of the sediment peak, with the time of sediment peak lagging behind flood peak increasing as the impounded level increased.
JOURNAL OF HYDROLOGY
(2021)
Article
Green & Sustainable Science & Technology
Qian Feng, Linyao Dong, Jingjun Liu, Honghu Liu
Summary: A detection framework is introduced in this study to identify temporal changes in rainfall erosivity time series. The framework is effectively applied in analyzing the variation of rainfall erosivity in the Three Gorges Reservoir, China. Compared with traditional methods, the proposed framework reduces uncertainty in the results.
Article
Environmental Sciences
Sheila Cardoso-Silva, Juliana Oliveira Soares Silva Mizael, Daniele Frascareli, Rubens Cesar Lopes Figueira, Marcelo Pompeo, Eduardo Vicente, Viviane Moschini-Carlos
Summary: Using sediment cores, past environmental impacts related to eutrophication, erosion, and metal contamination in a subtropical reservoir were studied. Nutrient levels, sedimentation rates, and metal flows were found to be associated with anthropic activities, leading to changes in phytoplankton community composition and organic matter levels. Despite increased eutrophication and erosion from human activities, no signs of metal contamination were observed in the reservoir.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
E. R. C. Baynes, M. E. Kincey, J. Warburton
Summary: Through a multi-catchment analysis, we investigated the controls on sediment production and export during extreme rainfall-runoff events. A 3 hr extreme rainfall event had significantly different impacts across three catchments, with sediment export ranging from two orders of magnitude higher than the typical long-term average to minimal impact. Catchment steepness and the presence of reach-scale morphological transitions caused by postglacial landscape adjustment were the primary factors influencing this variability.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Wenxian Sun, Zike Zhou, Xianwei Yin, Yongping Wang, Haowei Teng, Aiju Liu, Yanfei Ma, Xiaoyin Niu
Summary: Lake sediment records the evolution process of the interaction between human and nature, and it is important to master the lacustrine sedimentation rate for the ecological environment assessment of catchment. By analyzing various parameters in sediment cores, the response of sedimentation rate to environmental evolution can be reconstructed. Cluster analysis revealed three stages of environmental changes, with increasing sedimentation rates over time, indicating continuous exogenous inputs. Pearson correlation analysis and redundancy analysis showed that sedimentation rates were positively correlated with climatic factors, particle size, nutrients and metals mass fractions, elemental ratios, and socioeconomic parameters. Therefore, sedimentation rates can be used to reconstruct the environmental evolution process at a small catchment scale.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Geography, Physical
Konstantinos Kaffas, George Papaioannou, George Varlas, Mario J. Al Sayah, Anastasios Papadopoulos, Elias Dimitriou, Petros Katsafados, Maurizio Righetti
Summary: This study aims to forecast soil erosion and sediment yields resulting from a disastrous storm event in Mandra town, Greece. The findings provide insights into the severity of soil loss and inform erosion prevention measures.
EARTH SURFACE PROCESSES AND LANDFORMS
(2022)
Article
Environmental Sciences
Mario J. Al Sayah, Chadi Abdallah, Michel Khouri, Rachid Nedjai, Talal Darwish, Houssein Khatib
Summary: This study integrates land cover suitability, soil erosion, and sediment transport as complementary indicators within the Land Degradation Neutrality (LDN) framework. Using the Lebanese Nahr Ibrahim basin as a case study, the study demonstrates the effectiveness of LDN in improving land cover suitability and reducing soil erosion and sediment transport risks.
GEOCARTO INTERNATIONAL
(2022)
Article
Energy & Fuels
Diego Avesani, Ariele Zanfei, Nicola Di Marco, Andrea Galletti, Francesco Ravazzolo, Maurizio Righetti, Bruno Majone
Summary: This paper discusses the impact of the transformation of the electricity market on storage reservoir systems, and proposes a short-term optimization method for improving hydropower revenue using two econometric models. The study indicates that using the Autoarimax model can enhance the accuracy of electricity price forecasting and achieve higher revenues in hydropower systems.
Article
Computer Science, Interdisciplinary Applications
Maurizio Tavelli, Walter Boscheri, Giulia Stradiotti, Giuseppe Roberto Pisaturo, Maurizio Righetti
Summary: This paper presents the development of a semi-implicit numerical method for the Navier-Stokes equations using the non-linear volumes of fluid (VOF) approach and a semi-Lagrangian scheme. The method preserves mass conservation and provides information about the main velocity field and its high order moments, making it suitable for unstructured grids in two-dimensional and three-dimensional cases. The accuracy of the method is verified through convergence studies and validated against various benchmark tests, including complex geometry non-hydrostatic flows.
COMPUTERS & FLUIDS
(2022)
Article
Engineering, Civil
Ariele Zanfei, Andrea Menapace, Francesco Granata, Rudy Gargano, Matteo Frisinghelli, Maurizio Righetti
Summary: This study successfully addresses the challenge of short-term water consumption forecasting in small-scale water supply systems by proposing an ensemble neural network model and time-varying correction modules.
JOURNAL OF WATER RESOURCES PLANNING AND MANAGEMENT
(2022)
Article
Environmental Sciences
Ariele Zanfei, Bruno M. Brentan, Andrea Menapace, Maurizio Righetti, Manuel Herrera
Summary: This paper proposes a novel graph convolutional recurrent neural network (GCRNN) for short-term water demand forecasting, which can capture the dependence among different water demand time series in both spatial and temporal aspects. The GCRNN outperforms the LSTM in the fault test, showing its ability to generate accurate and reliable predictions.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Mario J. Al Sayah, Pierre-Antoine Versini, Daniel Schertzer
Summary: This paper examines the documentation produced by 21 Horizon 2020 projects on the use of Nature Based Solutions for climate change adaptation. It provides an updated state-of-the-art on current knowledge and identifies research needs. The main objective is to inform future research directions on Nature Based Solutions for climate change adaptation, complementing the 2021 European strategy. The findings reflect outcomes from completed projects and highlight the importance of further developing the scientific basis behind these solutions.
Article
Computer Science, Interdisciplinary Applications
Ariele Zanfei, Bruno Melo Brentan, Andrea Menapace, Maurizio Righetti
Summary: This study proposes a deep learning model based on LSTM neural networks for predicting hourly water demand. The model processes different temporal sequences of data with two modules and demonstrates potential in short-term water demand prediction.
JOURNAL OF HYDROINFORMATICS
(2022)
Article
Engineering, Civil
Ariele Zanfei, Andrea Menapace, Bruno Melo Brentan, Maurizio Righetti
Summary: This study analyzes the role of missing data imputation in short-term forecasting. The results show that high-quality imputation significantly affects the forecasting results, with significant variation in the accuracy of models using past observations as inputs. However, models using only static variables as inputs are not affected by the imputation process.
JOURNAL OF WATER RESOURCES PLANNING AND MANAGEMENT
(2022)
Article
Construction & Building Technology
Ariele Zanfei, Andrea Menapace, Bruno M. Brentan, Maurizio Righetti, Manuel Herrera
Summary: The sustainable management of water resources is crucial for the well-being and security of society worldwide. This study proposes a novel water distribution system (WDS) management framework based on graph convolutional neural networks (GCN) for efficient detection of anomalies like leaks and pipe bursts.
SUSTAINABLE CITIES AND SOCIETY
(2022)
Article
Chemistry, Analytical
Cosimo Brogi, Vassilios Pisinaras, Markus Koehli, Olga Dombrowski, Harrie-Jan Hendricks Franssen, Konstantinos Babakos, Anna Chatzi, Andreas Panagopoulos, Heye Reemt Bogena
Summary: Due to their unique characteristics, cosmic-ray neutron sensors (CRNSs) have the potential to monitor and inform irrigation management, optimizing water resource usage in agriculture. However, current practical methods for monitoring small, irrigated fields with CRNSs are unavailable, and the challenges of targeting areas smaller than the CRNS sensing volume remain unaddressed. This study uses CRNSs to continuously monitor soil moisture dynamics in two similar-sized irrigated apple orchards in Greece, and compares the CRNS-derived soil moisture with a reference obtained from a dense sensor network. An ad hoc calibration improved the accuracy of the CRNS-derived soil moisture before irrigation, but a correction based on neutron transport simulations and measurements from a non-irrigated location proved to be more effective in enhancing the CRNS-derived soil moisture, allowing for the monitoring of irrigation-induced soil moisture dynamics.
Article
Green & Sustainable Science & Technology
Vassilios Pisinaras, Frank Herrmann, Andreas Panagopoulos, Evangelos Tziritis, Ian McNamara, Frank Wendland
Summary: To support sustainable water resources management in the Pinios River Basin (PRB), we established and calibrated the mGROWA hydrological model at a high resolution (100 meters) and daily time scale, considering crop-specific irrigation requirements and overcoming data scarcity constraints. This approach provides spatially continuous estimates of various water balance components, such as actual evapotranspiration, irrigation requirements, total runoff, and groundwater recharge, and enables identification of potential unsustainable water use in irrigated agriculture.
Article
Agronomy
Iphigenia Keramitsoglou, Panagiotis Sismanidis, Olga Sykioti, Vassilios Pisinaras, Ioannis Tsakmakis, Andreas Panagopoulos, Argyrios Argyriou, Chris T. Kiranoudis
Summary: A new satellite-enabled interoperable service called SENSE-GDD has been developed to provide high-resolution and continuous time series of Growing Degree Days (GDDs) at the field level. Using MSG-SEVIRI data acquired by the EUMETCast station, the service calculates GDDs and downscales them on-the-fly to improve the spatial resolution. The reliability of SENSE-GDD in deriving accurate GDD timeseries at key phenological stages is assessed using in situ air temperature measurements from weather stations in vineyards and an apple orchard in Greece, and the assessment shows promising results.
Article
Geosciences, Multidisciplinary
Loukas Avgeris, Konstantinos Kaffas, Vlassios Hrissanthou
Summary: The study conducted measurements of water discharge, bed load transport rate, and suspended sediment concentration in two intermittent streams in northeastern Greece. The results showed that the modified Yang formulas can be successfully used for determining the total sediment concentration in the rivers.
Article
Geosciences, Multidisciplinary
Haihua Wang, Huaiyang Ke, Hongping Wu, Siyuan Ma, Muhammad Mohsin Altaf, Xiaoping Diao
Summary: Carbon storage in mangroves is crucial for mitigating climate change, but our understanding of this aspect is limited. This study investigated the seasonal changes in the carbon metabolic profile of microbial communities in mangrove soils on Hainan Island, China, and found that season plays a critical role in shaping the carbon functional diversity of microbial communities.
Article
Geosciences, Multidisciplinary
Donghui Zhao, Congcong Shen, Zhi-Ming Zhang, Jichen Wang, Li-Mei Zhang, Baodong Chen, Guo-Xin Sun, Yuan Ge
Summary: By studying soil samples from different slope directions along an elevational gradient in a mountain ecosystem, we found that soil bacterial diversity and microbial functions exhibit distinct elevational patterns, which are consistent across slope directions. The bacterial diversity shows a hump-shaped pattern, while microbial functions exhibit a linear increasing trend. Additionally, the beta diversity pattern of soil bacteria is significantly influenced by elevational distance decay relationships. Soil bacterial diversity patterns are determined by transitions in community assembly processes, whereas microbial functions are mainly influenced by bacterial community composition.
Article
Geosciences, Multidisciplinary
Guanfang Sun, Yan Zhu, Wei Mao, Yonghong Li, Jinzhong Yang, Zhaoliang Gao
Summary: This study developed a water and salt balance model to predict long-term water and salt dynamics in seasonally frozen arid agricultural regions. The model was validated in a region in China and showed that increasing autumn irrigation water can decrease soil salinity during the irrigation period, but has limited impact on long-term average soil salinity.
Article
Geosciences, Multidisciplinary
Alfredo Mayoral, Ana Ejarque, Arnau Garcia-Molsosa, Mercourios Georgiadis, Giannis Apostolou, Vincent Gaertner, Constantina Kallintzi, Eurydice Kefalidou, Hector Orengo
Summary: This paper presents an integrated Geoarchaeological approach to studying the landscape change and socio-environmental interaction around ancient Abdera. The study uses a combination of remote sensing, geomorphological mapping, sedimentary coring, and radiocarbon dating to reconstruct the palaeogeographic evolution of the area. The results challenge previous narratives about the rise and decline of Abdera and provide new insights into the role of historical and environmental factors. It also introduces evidence of submerged Neolithic landscapes and the impact of anthropogenic forcing on the sedimentary systems.
Article
Geosciences, Multidisciplinary
Jiale Chen, Michael Dannenmann, Qiang Yu, Yalong Shi, Matthew D. Wallenstein, Xinguo Han, Honghui Wu, Klaus Butterbach-Bahl
Summary: This study investigated the effects of temperature and moisture on soil nitrogen turnover through field experiments and laboratory incubation experiments. The results showed that soil temperature had a greater explanatory power than moisture in gross ammonification and nitrification rates. Climate warming may have a greater impact on gross nitrogen turnover compared to changes in rainfall.
Article
Geosciences, Multidisciplinary
Zhen Han, Xiuchao Yang, Xiaoai Yin, Qian Fang, Longshan Zhao
Summary: This study investigated the effects of exposed root distribution patterns on rainfall-runoff processes. The results showed that the distribution patterns of exposed root had a significant impact on rainfall-runoff processes. A vertical slope arrangement was conducive to rainfall infiltration, a parallel slope arrangement resulted in more surface runoff, and a transverse slope arrangement could reduce water loss.
Article
Geosciences, Multidisciplinary
Bo Zhao
Summary: Seismic earthflows, as special seismic landslides, have not received much attention in previous studies. This study analyzed the characteristics and movement of earthflows induced by recent earthquakes. The results showed that earthflows occur in high-rainfall areas and are sensitive to rainfall. Compared to other seismic landslides, seismic earthflows occur on gentler hills and have higher mobility.
Article
Geosciences, Multidisciplinary
Tingxi Liu, Xueqin Wang, Mingyang Li, Dongfang Li, Limin Duan, Xin Tong, Guanli Wang
Summary: Soil respiration plays a crucial role in the global carbon cycle in arid and semi-arid regions, and is regulated by hydrothermal factors. This study examined the seasonal and diurnal dynamics of soil respiration in two typical ecosystems in northern China, and investigated their responses to precipitation, temperature, and drought. The results showed that soil respiration varied seasonally and diurnally, and its response to environmental factors depended on the ecosystem type and soil moisture status. Incorporating multiple factors into carbon cycle models can improve the simulation and prediction of carbon emissions in arid and semi-arid regions.
Article
Geosciences, Multidisciplinary
Yaochen Xu, Ninghua Chen, Deguo Zhang, Bowen Gao, Xuhua Weng, Hongcheng Qiu
Summary: This study provides systematic investigation on how yardangs exert control over dune morphology, and reveals the intricate wind dynamics and mechanisms involved. Computational fluid dynamics modeling and remote sensing data further support the observations and shed light on the influences of yardangs on wind deposition and dune formation.
Article
Geosciences, Multidisciplinary
Yuri Lopes Zinn, Welton Pereira da Rocha Jr
Summary: This study assessed the evolution of Journal Impact Factors (JIF) and related data in the field of Soil Science over a 26-year period, and compared it with the field of Agronomy. The results showed a significant growth in JIFs and output in Soil Science, with commercial scientific publishers' journals experiencing higher growth rates than non-profit journals. The study also highlighted the importance of considering not only JIF, but also the bibliometric footprint, in determining the relevance and leadership of journals in the discipline.
Article
Geosciences, Multidisciplinary
Shanshan Liao, Xiaodong Nie, Aoqi Zeng, Wenfei Liao, Yi Liu, Zhongwu Li
Summary: Lake drawdown areas, where sediment is exposed due to water level fluctuations, have a significant impact on the carbon cycle. This study examined microbial necromass carbon (MNC) content and its contribution to soil organic carbon (SOC) in different habitats within the drawdown area of Dongting Lake. The results showed that MNC content varied among habitats and was primarily influenced by carbon and nitrogen availability, plant biomass, clay content, and soil moisture. External factors, such as plant and soil properties, played a more crucial role in the long-term accumulation of MNC. These findings enhance our understanding of MNC stability in drawdown areas.
Article
Geosciences, Multidisciplinary
Vanessa Alves Mantovani, Marcela de Castro Nunes Santos Terra, Andre Ferreira Rodrigues, Carlos Alberto Silva, Li Guo, Jose Marcio de Mello, Carlos Rogerio de Mello
Summary: There is a lack of research on the potential of tropical soils in the Brazilian Atlantic Forest biome to store carbon. This study aimed to determine the soil carbon stocks at different depths, describe their temporal variability, and identify the main drivers that influence their variations. The results showed significant spatial and seasonal variability in soil carbon stocks, with a high accumulation in December and a low accumulation in August. The study also found that litterfall, throughfall, tree sizes, and soil moisture were important factors affecting the distribution of soil carbon.
Article
Geosciences, Multidisciplinary
Anais Zimmer, Timothy Beach, Sheryl Luzzadder-Beach, Antoine Rabatel, Rolando Cruz Encarnacion, Joshua Lopez Robles, Edison Jara Tarazona, Arnaud J. A. M. Temme
Summary: Climate warming has accelerated glacial retreat and soil formation in mountainous regions. The accumulation of soil organic carbon and nitrogen is influenced by environmental factors, with maximum temperature and initial site conditions playing important roles in soil development.
Article
Geosciences, Multidisciplinary
Ren-Min Yang, Lai-Ming Huang, Feng Liu
Summary: This study investigated the soil organic carbon (SOC) stocks in seasonally frozen ground (SFG) in the Tibet Autonomous Region, China, in 2020 and 2021, and explored the effects of various factors on SOC using partial least squares structural equation modeling (PLS-SEM). The results showed that C inputs exerted the greatest control on SOC, and the influence of these factors decreased with increasing soil depth. Additionally, timely spatial SOC estimates were found to be important for assessing carbon stocks in the context of environmental changes.
Article
Geosciences, Multidisciplinary
Shue Wei, Kuandi Zhang, Chenglong Liu, Youdong Cen, Junqiang Xia
Summary: This study analyzed the effects of different vegetation components on erosion through simulated rainfall experiments and found that litter had the best effect in reducing erosion, followed by roots. The study also revealed that the reduction in runoff and sediment by the treatments decreased with increasing rainfall intensity.