Article
Environmental Sciences
Qian Zhang, Zheng Gong, Changkuan Zhang, Jessica Lacy, Bruce Jaffe, Beibei Xu, Xindi Chen
Summary: The study found that flow and SSC surges occur during periods of very shallow water on tidal flats, with flood surges in the lower intertidal flat being erosive and leading to local resuspension, while weaker surges in the middle intertidal flat do not resuspend bed sediment. Surges on the lower intertidal flats contribute up to 25% of onshore-suspended sediment flux during flood tides, despite lasting only 10% of the flood duration.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Annika Fediuk, Tina Wunderlich, Dennis Wilken, Wolfgang Rabbel
Summary: This study investigates the application of GPR measurements in freshwater to derive rules for depth penetration, resolution, and material contrasts. The results show that the method is attractive for archaeological issues in water and can be used for mapping and volume estimation of biomass in lakes.
Article
Multidisciplinary Sciences
Davide Tognin, Alvise Finotello, Andrea D'Alpaos, Daniele P. Viero, Mattia Pivato, Riccardo A. Mel, Andrea Defina, Enrico Bertuzzo, Marco Marani, Luca Carniello
Summary: Coastal flooding prevention measures, such as storm-surge barriers, are widely adopted globally due to rising sea levels. However, their effects on shallow tidal embayment morphodynamics are poorly understood. Field data and modeling results from the microtidal Venice Lagoon reveal that artificial reduction of water levels leads to increased sediment resuspension and decreased salt marsh accretion.
Review
Geochemistry & Geophysics
Peter Berg, Markus Huettel, Ronnie N. Glud, Clare E. Reimers, Karl M. Attard
Summary: Aquatic eddy covariance (AEC) is a noninvasive technique with high temporal resolution and large area coverage, which provides new insights and more accurate assessments of the functioning and metabolism of aquatic ecosystems. The studies using AEC have revealed that benthic oxygen exchange is more dynamic than previously recognized, and accurate mean values can only be obtained by integrating measurements over all timescales. The technique has also seen new developments in measuring air-water gas exchange and long-term deployments.
ANNUAL REVIEW OF MARINE SCIENCE
(2022)
Article
Environmental Sciences
Andrew C. Hill, Rodrigo Vargas
Summary: This study compared ecosystem-scale eddy covariance with plot-scale chamber measurements in a temperate salt marsh and found good agreement in CH4 emissions and CO2 exchange. However, there were discrepancies during canopy senescence and dormancy phenophases. Upscaling models parameterized with chamber measurements overestimated NEE and GPP while underestimating Reco and CH4 emissions compared to eddy covariance measurements.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Engineering, Environmental
Heyang Sun, Ruihong Yu, Xinyu Liu, Zhengxu Cao, Xiangwei Li, Zhuangzhuang Zhang, Jun Wang, Shuai Zhuang, Zheng Ge, Linxiang Zhang, Liangqi Sun, Andreas Lorke, Jie Yang, Changwei Lu, Xixi Lu
Summary: Shallow eutrophic lakes have a significant impact on CO2 and CH4 emissions from inland waters, but the processes and environmental influences are still poorly understood. This study examines the spatial and seasonal dynamics of CO2 and CH4 fluxes and their relationship with porewater nutrients in Lake Ulansuhai, Northern China. It finds that environmental factors and porewater nutrient concentrations play a key role in driving CO2 and CH4 fluxes.
Article
Oceanography
Stuart G. Pearson, Romaric Verney, Bram C. van Prooijen, Duc Tran, Erik C. M. Hendriks, Matthias Jacquet, Zheng Bing Wang
Summary: Quantifying and characterizing suspended sediment is crucial for monitoring and managing estuaries and coastal environments. Optical backscatter systems are more sensitive to mud particles, while acoustic backscatter systems are more responsive to sand grains. This study aims to develop a methodology for determining the relative proportions of sand and mud in mixed sediment suspensions by comparing optical and acoustic measurements. The sediment composition index (SCI) derived from this methodology provides valuable knowledge of suspended sediment composition in mixed sediment environments.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Engineering, Civil
Yuanning Zhang, Bowen Sun, Wenhui Ju, Xueping Gao, Xiaoxue Guo, Chengji Shen, Shijie Zhang, Chang Liu, Shiyan Wang, Xiaobo Liu
Summary: The study conducted a 3-month non-invasive measurement of SWI oxygen fluxes in the Daheiting Reservoir, revealing significant impacts of thermal stratification and human operations on benthic boundary layer environment factors and hydrodynamics.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Environmental
Taylor D. Sullivan, Andrew D. Parsekian
Summary: High fidelity observations of water in permafrost are important for understanding soil moisture behavior and its impact on surface energy balance. Temperature-specific calibration of borehole NMR measurements is necessary for accurate results. Failure to compensate for temperature can result in significant bias in reported water content values, especially in conditions with steep temperature gradients.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Xiaomin Yuan, Qiang Liu, Shuzhen Li, Baoshan Cui, Wei Yang, Tao Sun, Xuan Wang, Chunhui Li, Yanpeng Cai, Miao Li, Jialiang Zhou
Summary: High-strength changes in water level resulting from extreme climate change and increased human activities affect the emission variations of methane (CH4) and carbon dioxide (CO2) in shallow lakes. However, the relationship between carbon emission flux and water-level fluctuations and temperature is not yet clear. This study evaluates the impact of water depth on CH4, CO2, and greenhouse gas (GHG) emissions, and analyzes the temperature dependence of carbon emissions at different water levels. Understanding the threshold and managing the timing of its occurrence are crucial for achieving restoration management goals related to carbon emissions.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Ecology
Chuanqiao Zhou, Yu Peng, Li Chen, Miaotong Yu, Muchun Zhou, Runze Xu, Lanqing Zhang, Siyuan Zhang, Xiaoguang Xu, Limin Zhang, Guoxiang Wang
Summary: Except for excessive nutrient input and climate warming, the rapidly rising SO42- concentration is considered as a crucial contributor to the eutrophication in shallow lakes. This study found that the increase in SO42- concentration and cyanobacteria-derived organic matter stimulated the sulfate reduction rate, leading to an increase in sulfate reduction bacteria abundance and the release of total phosphorus, promoting eutrophication in lakes.
Article
Geosciences, Multidisciplinary
Jingzhe Li, Piyang Liu, Shuyu Sun, Zhifeng Sun, Yongzhang Zhou, Liang Gong, Jinliang Zhang, Dongxing Du
Summary: The authors presented their recent development and application of Sedapp, a new nonlinear open-source R code for forward stratigraphic modeling (FSM). This code integrates a depth-distance related function as the expression of the transport coefficient and introduces additional parameters for more alongshore details. Results from simplified case studies showed that Sedapp not only assists in geologic interpretation but is also an efficient tool for internal architecture predictions.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2021)
Article
Engineering, Marine
Xin Chen, Hui Shen, Jinxiong Yuan, Li Li
Summary: The turbidity maximum zone (TMZ) plays a crucial role in the morphology and ecosystems of estuaries, and the distribution and sediment flux mechanisms of TMZ in Hangzhou Bay have been studied using a fully calibrated three-dimensional model. The results indicate that the TMZ is mainly distributed from Yanguan to Zhapu, and the sediment fluxes are influenced by various factors such as salinity, turbidity, sediment flocculation, and density coupling.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Axel Schaffitel, Tobias Schuetz, Markus Weiler
Summary: Water fluxes at the soil-atmosphere interface play a crucial role in understanding the terrestrial water cycle. Utilizing soil moisture measurements for data-driven approaches is a simple and effective method to derive water fluxes directly.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2021)
Article
Environmental Sciences
Bijan Dargahi
Summary: This study investigated the environmental risks of seabed mining for metal resources in the Baltic Sea. The findings suggest that mining significantly alters sediment dynamics and poses a serious threat to the ecological health of the sea. Additionally, mining operations will expose highly contaminated sediments at the seabed to the flow, causing further harm to the maritime environment.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Marine & Freshwater Biology
Arnoldo Valle-Levinson, Marco Marani, Luca Carniello, Andrea D'Alpaos, Stefano Lanzoni
Summary: Annual mean sea-level records in the northern Adriatic Sea over nearly 130 years show that the interannual variability is influenced by lunar precessions and solar activity. By fitting harmonics related to these factors, it was possible to explain more than 75% of the sea-level variability and predict future trends in the region. Additionally, anomalously high mean sea levels were observed during most of the high peaks of solar cycles in the area.
ESTUARINE COASTAL AND SHELF SCIENCE
(2021)
Article
Environmental Sciences
Sonia Silvestri, Veronica Capra, Sara Cucchiaro, Mattia Pivato, Paolo Tarolli
Summary: This study investigates the spatial distribution and density of a P. nobilis population on a tidal flat in the Venice lagoon and finds that the topographic elevation and seagrass percentage cover are important factors affecting population abundance.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Marine & Freshwater Biology
Tegan R. Blount, A. Rita Carrasco, Sonia Cristina, Sonia Silvestri
Summary: This study examines the long-term evolution of salt marshes in the Ria Formosa coastal lagoon in Portugal using open-source multispectral satellite remote sensing data and aerial photography surveys. The results show that open-source satellite data can be a useful tool for tracking changes in salt marsh extent, although the spatial resolution of the datasets is a main source of error.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Multidisciplinary Sciences
Davide Tognin, Alvise Finotello, Andrea D'Alpaos, Daniele P. Viero, Mattia Pivato, Riccardo A. Mel, Andrea Defina, Enrico Bertuzzo, Marco Marani, Luca Carniello
Summary: Coastal flooding prevention measures, such as storm-surge barriers, are widely adopted globally due to rising sea levels. However, their effects on shallow tidal embayment morphodynamics are poorly understood. Field data and modeling results from the microtidal Venice Lagoon reveal that artificial reduction of water levels leads to increased sediment resuspension and decreased salt marsh accretion.
Editorial Material
Geosciences, Multidisciplinary
Sonia Silvestri, Diep Ngoc Nguyen, Emilia Chiapponi
Summary: Nguyen et al. suggest that Landsat 8 OLI can be used to map and monitor soil salinity in the coastal zone of the Mekong River Delta. The presence of water affects NIR reflectance, with no significant correlation found between reflectance and soil salinity.
PROGRESS IN EARTH AND PLANETARY SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Xiaoyan Zhou, Zhijun Dai, Luca Carniello, Chuqi Long, Riming Wang, Jiejun Luo, Zuming Huang
Summary: Mangrove wetlands play a crucial role in mitigating casualties and financial losses caused by typhoons in global mega-delta cities, primarily through wave energy attenuation. This study explores the wave attenuation process of Aegiceras corniculatum (AC) during a storm period in the Nanliu Delta, China. The results show that AC exhibits higher wave damping coefficient during storms compared to normal weather conditions. Sapling and adult AC, despite being densely distributed, have a greater impact on reducing wave height than sparsely distributed seedlings. Furthermore, the attenuation of wave height is linearly related to the landward wave propagation distance along AC plots of different ages. These findings emphasize the importance of AC trees of different ages and densities under different weather conditions in wave attenuation.
Article
Environmental Sciences
Chao Gao, Alvise Finotello, Andrea D'Alpaos, Massimiliano Ghinassi, Luca Carniello, Yupeng Pan, Dezhi Chen, Ya Ping Wang
Summary: Meandering channels in intertidal mudflats are important but poorly understood features in terms of hydrodynamics and morphodynamic evolution. This study presents new hydroacoustic data collected from a mudflat meander in China over an 8-day period. The results show the dominance of flood flows and the limited impact of curvature-induced helical flows on the morphodynamics of the meander. The findings contribute to a better understanding of intertidal mudflat meanders and their planform characteristics.
WATER RESOURCES RESEARCH
(2022)
Article
Engineering, Civil
Gaby J. Grundemann, Enrico Zorzetto, Hylke E. Beck, Marc Schleiss, Nick van de Giesen, Marco Marani, Ruud J. van der Ent
Summary: This research uses the MSWEP dataset to quantitatively characterize global precipitation extremes and calculate extreme precipitation return levels for multiple durations. Results show that the traditional GEV and POT methods are not spatially coherent, while the MEV method has smoother spatial patterns of local extremes.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Alvise Finotello, Davide Tognin, Luca Carniello, Massimiliano Ghinassi, Enrico Bertuzzo, Andrea D'Alpaos
Summary: The loss of salt marshes in back-barrier tidal embayments is causing significant changes in hydrodynamics, including higher water levels and reduced wave energy dissipation. Restoration projects and manmade protection of marsh margins have limited the negative effects of marsh loss, but the risk of flooding in urban settlements remains unchanged. The hydrodynamic response to salt-marsh erosion is highly site-specific, depending on embayment morphology and external tidal and wind forcings.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Zhicheng Yang, Davide Tognin, Alvise Finotello, Enrica Belluco, Alice Puppin, Sonia Silvestri, Marco Marani, Andrea D'Alpaos
Summary: Tight interplays between physical and biotic processes in tidal salt marshes lead to self-organization of halophytic vegetation into recurrent zonation patterns developed across elevation gradients. Despite its importance for marsh ecomorphodynamics, the response of vegetation zonation to changing environmental forcings remains difficult to predict, mostly because of lacking long-term field observations of vegetation evolution in the face of changing rates of sea level rise and marsh vertical accretion.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Environmental Sciences
A. Puppin, M. Roner, A. Finotello, M. Ghinassi, L. Tommasini, M. Marani, A. D'Alpaos
Summary: Tidal salt marshes are ecologically and economically important as they provide valuable ecosystem services, such as carbon storage and resilience to rising sea levels. Understanding organic matter dynamics is crucial for salt-marsh conservation and studying their role in the global carbon cycle.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Engineering, Marine
Riccardo Alvise Mel, Elisa Coraci, Sara Morucci, Franco Crosato, Michele Cornello, Marco Casaioli, Stefano Mariani, Luca Carniello, Alvise Papa, Andrea Bonometto, Maurizio Ferla
Summary: The Italian Institute for Environmental Protection and Research manages a real time monitoring system for Italy's sea state. This system is used to monitor and predict storm surges in the northern Adriatic Sea and Venice Lagoon. The article presents an analysis of an extreme storm surge event to highlight the functionality and usefulness of the monitoring system.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Eleonora Dallan, Francesco Marra, Giorgia Fosser, Marco Marani, Giuseppe Formetta, Christoph Schar, Marco Borga
Summary: High-resolution convection-permitting models (CPMs) are crucial for estimating future short-duration extreme precipitation in mountainous regions. However, recent observational studies indicate that extreme hourly precipitation tends to decrease with elevation, which may be related to subgrid processes not fully simulated by CPMs. To evaluate the reliability of CPM projections, it is important to understand their ability to capture this reverse orographic effect.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Maria Francesca Caruso, Marco Marani
Summary: Accurate estimation of the probability of extreme sea levels is crucial for assessing risk and designing coastal defense structures. This study compares different statistical approaches for estimating high quantiles and investigates the uncertainty associated with different calibration sample sizes. The results show that the metastatistical extreme-value distribution framework provides robust quantile estimates, especially with longer sample sizes. However, the optimal solution independent of the return period of interest remains elusive.
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
(2022)
