Article
Environmental Sciences
Rongjia Wang, Chunju Cai, Jianfeng Zhang, Shiyong Sun, Handan Zhang
Summary: This study investigated the vertical variation of phosphorus loss in different stands of moso bamboo and found that different rainfall factors had varying impacts on phosphorus loss at different vertical levels. Modifying the forest structure in water source areas can reduce phosphorus loss, but the effect on surface runoff phosphorus loss is variable.
INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH
(2022)
Article
Agronomy
Wei Wan, Yiwen Han, Hanqing Wu, Fan Liu, Zhong Liu
Summary: This study examined the influence of fertilizer application rates and land use types on agricultural non-point source pollution (ANPSP) risks in apple orchard-dominated landscapes in the Qixia region of northern China. Two fertilization scenarios were simulated to reduce ANPSP risks, resulting in significant reductions in high-risk areas and increases in low-risk areas. Additionally, the results demonstrated the effectiveness of the source-sink landscape method in assessing ANPSP at both regional and global scales.
AGRICULTURAL WATER MANAGEMENT
(2021)
Article
Engineering, Civil
Xue Tong, Xijun Lai, Qiuhua Liang
Summary: Non-point source pollutants pose a significant threat to aquatic systems by deteriorating water quality and causing eutrophication. This paper presents a new hydrological-water quality model for humid and semi-humid catchments in China, considering both hydrological processes and nutrient transport. The model divides the soil into three layers and incorporates separate computational procedures for soil wetness and nutrient process. Nutrient transport follows the same pathways as water flow, including surface runoff, infiltration, and outflow from soil layers. The model is successfully applied to simulate hydrological processes and phosphorus transport in the Tongyang River Basin, and sensitivity analysis reveals influential parameters controlling flood peak arrival time and nutrient concentration peak duration.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Kishore Panjabi, Ramesh Rudra, Pradeep Goel, Syed Ahmed, Bahram Gharabaghi
Summary: The study developed a modified distributed CN-VSA method to account for seasonal changes in potential maximum retention, which performed better than the traditional method in simulating runoff amount and spatial distribution of runoff-generating areas.
Article
Engineering, Civil
Linmao Guo, Kewei Huang, Genxu Wang, Shan Lin
Summary: In this study, a temperature-induced variable source area (TVSA) runoff generation model was developed for permafrost regions. The model was calibrated and validated using field observations, and it successfully reproduced freeze-thaw processes and discharges with high accuracy.
JOURNAL OF HYDROLOGY
(2022)
Review
Chemistry, Multidisciplinary
Li He, Zhongwen Ou, Jiangyang Fan, Boping Zeng, Wei Guan
Summary: This article focuses on the sources and influence characteristics of microplastic pollution in surface water bodies, with a particular emphasis on the importance and urgency of studying agricultural non-point sources of microplastic pollution. It aims to provide effective scientific basis and technical support for the control of microplastic non-point source pollution in river basins.
FRONTIERS IN CHEMISTRY
(2022)
Article
Environmental Sciences
Shuai Hu, Lan Zhu, Zhaolong Wang
Summary: Greenhouse vegetable production is a major non-point source pollution due to high fertilizer input and low nutrient use efficiency. Intercropping with turfgrass, especially Paspalum vaginatum, can significantly reduce pollution discharges via both surface runoff and leaching, making it a clean and sustainable solution to prevent NPS pollution in greenhouse vegetable production.
Review
Biotechnology & Applied Microbiology
Yuvaraj Ravikumar, Junhua Yun, Guoyan Zhang, Hossain M. Zabed, Xianghui Qi
Summary: Non-Point Source (NPS) pollution is a critical global problem, leading to excessive supply of organic and inorganic pollutants and changing water quality. Constructed wetlands (CWs) have been gaining attention for their potential in mitigating pharmaceutical contaminants (PCs) in soil and water reservoirs. This paper summarizes the sources, occurrence, fate, and ecotoxicological effects of PCs derived from NPS pollution, discusses the significance of plants and other factors in CWs for efficient removal of PCs, and emphasizes the need for future research to improve the application of CWs.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Plant Sciences
Feifan Zeng, Zheng Zuo, Juncheng Mo, Chengyu Chen, Xingjian Yang, Jinjin Wang, Yi Wang, Zhongqiu Zhao, Tianyi Chen, Yongtao Li, Zhen Zhang, Zheng Hu, Huijuan Xu
Summary: Surface runoff is a major pathway for agricultural nitrogen and phosphorus losses, with maize fields exhibiting significantly higher losses compared to paddy fields. Nitrate and ammonium were the main forms of nitrogen losses in paddy and maize fields, while particulate phosphorus form predominated in both systems. Effective management strategies related to fertilization, irrigation, and tillage can help reduce N and P losses and control non-point source pollution.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Geography, Physical
Xiaoyuan Zhao, Zhongwei Zhang, Xiaojie Liu, Qian Zhang, Lingqing Wang, Hao Chen, Guangcheng Xiong, Yuru Liu, Qiang Tang, Huada Daniel Ruan
Summary: There is a great uncertainty in the generation and formation of non-point source pollutants in agriculture, making it difficult to investigate and control these pollutants. This study established a modified model to calculate the pollutant loads, considering factors such as rainfall, terrain, runoff, leaching, and landscape intercept. The findings provide useful guidance for controlling non-point source pollution and advancing sustainable preventive measures in agriculture.
JOURNAL OF GEOGRAPHICAL SCIENCES
(2023)
Article
Environmental Sciences
Xu Zhang, Xiaoying Jiang, Ting Xia, Xuan Wei, Lei Wang, Ling Zhu, Zaizhuang Gao
Summary: This study explores the characteristics of phosphorus loss in surface and subsurface runoff from organic farming and forestry in the western Anhui Mountains. The results show that particulate phosphorus is the main form of phosphorus loss in surface runoff, and the proportion of phosphorus loss increases with rainfall intensity.
POLISH JOURNAL OF ENVIRONMENTAL STUDIES
(2023)
Article
Environmental Sciences
Ya Liao, Jingyi He, Baolin Su, Junfeng Dou, Yunqiang Xu, Lifen Li
Summary: A Beijing paddy field was used to validate and refine the in-situ observation method for describing nonpoint source pollution. The study found that the IO method was effective in estimating ET+F and NPS pollution, with small deviations observed in TN, TP, COD, NO3--N, and NH4+-N pollution loads. The location of water level gauges had little impact on IO but influenced water depth observations during the drying period.
Article
Forestry
Rongjia Wang, Jianfeng Zhang, Chunju Cai, Shufeng Wang
Summary: Controlling nitrogen (N) pollution in water source areas is crucial for ensuring human health. While reducing fertilizer application controls N pollution caused by agricultural fertilizers, pollution caused by soil and water erosion in hilly areas can only be controlled by conservation forests. Field observations in the catchment area around Fushi Reservoir revealed that the main N losses occur from June to September, accounting for a significant portion of the annual loss. By optimizing the stand structure of conservation forests, N leakage from the water source area was effectively reduced.
JOURNAL OF FORESTRY RESEARCH
(2023)
Article
Environmental Sciences
Li Huang, Xiaoying Han, Xuelei Wang, Yaodong Zhang, Jinfeng Yang, Aiping Feng, Jiaguo Li, Nanhuanuowa Zhu
Summary: A spatial continuous evaluation method coupled with high-resolution remote sensing data has been established and applied to estimate urban NPS nitrogen and phosphorus loads in Tongzhou, China. The method allows for quick spatial visualization assessment of urban NPS pollution and is applicable for entire cities or urban agglomerations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Multidisciplinary Sciences
Taoyan Dai, Liquan Wang, Tienan Li, Pengpeng Qiu, Jun Wang, Zhengjun Wang
Summary: This study examines the variations in soil erosion, nitrogen, and phosphorus loss in a typical hilly Blackland erosion control area. By setting up runoff plots with different slopes and adopting various soil and water conservation measures and vegetation cover levels, the study analyzes the patterns and characteristics of soil and nutrient loss during natural rainfall events between 2020 and 2022. The results show a significant positive correlation between soil and nutrient loss and rainfall intensity. Changing tillage methods and planting vegetation can effectively prevent soil, runoff, nitrogen, and phosphorus loss.
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)