Article
Environmental Sciences
L. J. Hall, E. J. S. Emilson, B. Edwards, S. A. Watmough
Summary: This study evaluated changes in lake and peat porewater chemistry in the Sudbury area and found that DOC concentrations increased over time, primarily affected by increasing pH and decreasing lake SO4 concentration. Strong relationships between DOC and pH (positive) and SO4 (negative) were observed in lakes, indicating that recovery from acidic deposition is the main factor contributing to the increase in DOC in Sudbury lakes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Fengsong Zhang, Yonglu Wang, Zhuo Wei, Guixiang Zhang, Jiaqi Wang
Summary: The study found high concentrations of PFCs in the water of the Huangshui River basin, with 12 PFCs detected in crops, showing a significant positive correlation with adjacent rivers. The PFCs in the water mainly came from wastewater discharged from treatment plants and carpet factories, with resuspension in sediments also playing a significant role.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Environmental Sciences
Yaoling Zhang, Keli Yang, Hongmei Chen, Yaping Dong, Wu Li
Summary: Inland saline lakes are common in arid and semi-arid regions and play an important role in the global carbon cycle through dissolved organic matter (DOM). However, the composition, origin, and cycling of DOM in hypersaline lakes remain largely unknown. This study analyzed DOM samples from Da Qaidam Lake in the Qinghai-Tibet Plateau using multiple methods and found that the DOM composition and features were influenced by in-lake processes rather than river inputs. The study also revealed the presence of unique components in the lake DOM, such as sulfur-bearing compounds.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Xiuling Bai, Yunkai Zhou, Wenna Ye, Hongyan Zhao, Jiehua Wang, Wenchao Li
Summary: The transformation rate of organic phosphorus is influenced by temperature and dissolved oxygen, with different compounds responding differently. Alkaline phosphatase may play a key role in the transformation of organic P at lower temperatures.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
Yu-Jun Ma, Ting Xie, Xiao-Yan Li
Summary: Soil organic carbon (SOC) on the Qinghai-Tibet plateau plays a significant role in global carbon dynamics. This study assessed the SOC stock and spatial patterns in the Qinghai Lake watershed. The results showed that SOC content decreased with depth and varied among different vegetation types. Soil profile depth, soil water content, and NDVI together explained a large portion of the variation in SOC density. The regression-kriging method was found to be the best approach for predicting SOC in the study area. The assessment revealed high storage and heterogeneity of SOC in the watershed, with implications for the sustainability of regional terrestrial ecosystems.
Article
Biodiversity Conservation
Hu Liu, Jia Liu, Jing Hu, Yunning Cao, Shangbin Xiao, Weiguo Liu
Summary: The C-13 values of aquatic plants in lakes are important for understanding carbon cycles and environmental changes. This study evaluated the influence of carbon sources' C-13 values on their C-13 differences, revealing that it is not the main factor determining the C-13 difference between different aquatic plant species. This finding contributes to the understanding of C-13 variations in carbon cycles and paleoenvironment reconstructions for lakes.
ECOLOGICAL INDICATORS
(2022)
Article
Geosciences, Multidisciplinary
Hewen Niu, Shichang Kang, Chandan Sarangi, Guotao Zhang, Mengxue Chen, Yuzhong Zhang, Huili Qin
Summary: This study systematically determines the organic and inorganic constituents in water bodies of the cryosphere region in the eastern Tibetan Plateau and finds that high-elevation water bodies have lower organic carbon content. Additionally, it suggests that atmospheric deposition and anthropogenic activities contribute to the observed patterns in organic carbon and nitrogen content.
Article
Green & Sustainable Science & Technology
Xiaodong Wang, Yang Xiao, Xinrui Luo, Chenyu Ye, Yuzhuo Chen, Jincheng Xiang, Ningfei Lei, Ci Song, Xiangjun Pei, Xiaolu Tang
Summary: This study investigated the short-term effects of tunnel construction on soil organic carbon (SOC) and soil enzyme activity in two shrublands in Eastern Tibet Plateau. The results showed that tunnel construction had minor impacts on SOC dynamics and soil enzymes in the early stage. Additionally, vegetation type had a significant impact on SOC and soil enzymes, highlighting the importance of vegetation control.
Article
Geosciences, Multidisciplinary
Rui-Zhe Wang, Xia Hu
Summary: Soils in alpine ecosystems are significant carbon sinks, with soil aggregates and their pore structure playing a crucial role in carbon sequestration. This study examined the soil pore structure, carbon content, and their relationships in three typical alpine ecosystems in the Qinghai-Tibet Plateau. The results revealed the dominance of small macroaggregates and microspores in the soil aggregates, as well as the correlation between carbon content and pore characteristics. Additionally, the study highlighted the impact of soil water content and particle compositions on soil organic carbon in different alpine ecosystems.
Article
Environmental Sciences
Qing-Feng Wang, Hui-Jun Jin, Cui-Cui Mu, Xiao-Dong Wu, Lin Zhao, Qing-Bai Wu
Summary: Studies on the responses of soil organic carbon (SOC) and nitrogen dynamics to Holocene climate and environment in permafrost peatlands and/or wetlands might serve as analogues for future scenarios, and they can help predict the fate of the frozen SOC and nitrogen under a warming climate. Little is known about these issues on the Qinghai-Tibet Plateau (QTP). This study investigated the accumulations of SOC and nitrogen in a permafrost wetland on the northeastern QTP and analyzed their links with Holocene climatic and environmental changes.
ADVANCES IN CLIMATE CHANGE RESEARCH
(2023)
Article
Environmental Sciences
William H. McDowell
Summary: Dissolved organic matter (DOM) is a heterogeneous mixture of organic compounds that is produced through microbial degradation and abiotic leaching, and it plays an important role in aquatic ecology and watershed management. The challenges in studying DOM include monitoring long-term changes, using sensors for short-term dynamics, understanding its role in the carbon cycle and greenhouse gas evasion, and exploring its evolutionary significance in various environments.
Article
Environmental Sciences
Philipp Maurischat, Lukas Lehnert, Vinzenz H. D. Zerres, Tuong Vi Tran, Karsten Kalbitz, Asmund Rinnan, Xiao Gang Li, Tsechoe Dorji, Georg Guggenberger
Summary: The Tibetan Plateau is a sensitive alpine environment that plays a vital role in Asia's water supply and contains significant ice masses and alpine grasslands. Intensified land-use and global climate change have put pressure on the Tibetan Plateau's ecosystem. This study investigated the variability of dissolved organic matter (DOM) to understand nutrient and energy fluxes within the region. The findings highlighted the importance of DOM as a marker for studying the impact of land use and climate change on biogeochemical processes in high-altitude alpine ecosystems.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Yadong Liu, Xiaodong Wu, Tonghua Wu, Lin Zhao, Ren Li, Wangping Li, Guojie Hu, Defu Zou, Jie Ni, Yizhen Du, Mengjuan Wang, Zhihong Li, Xianhua Wei, Xuchun Yan
Summary: Soil texture data is crucial for Earth System Models. This study predicts the spatial distribution of clay, silt, and sand contents at various soil depths on the Qinghai-Tibet Plateau using field survey data and environmental factors. The results show that the plateau is dominated by sand particles, with high silt and clay contents in the southeast and low contents in the northwest. Climate and NDVI values are identified as important factors influencing the soil texture distribution.
Article
Ecology
Yanzhen Hou, Wenwu Zhao, Yanxu Liu, Siqi Yang, Xiangping Hu, Francesco Cherubini
Summary: The study focuses on understanding the landscape service relationships, dynamics, and influencing factors in the Qinghai-Tibet Plateau to achieve sustainable landscape management. By evaluating the spatiotemporal distribution and relationships of multiple landscape services, the study identifies influencing factors such as temperature, elevation, population size, land use, and land cover. The results show variations in landscape services across the region and highlight the importance of considering trade-offs and synergies in sustainable landscape management.
Article
Engineering, Civil
Qi Huang, Lizhen Liu, Jiacong Huang, Dianwei Chi, Adam Thomas Devlin, Huawu Wu
Summary: The seasonal dynamics of CDOM and DOC in Poyang Lake are important for understanding biogeochemical processes and water quality. Rivers and wetlands greatly influence the quantity and quality of CDOM. The alternations of flood and dry periods have different effects on CDOM and DOC. Wetlands contribute a higher abundance of CDOM and DOC to the lake with lower aromaticity.
JOURNAL OF HYDROLOGY
(2022)
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)