Article
Green & Sustainable Science & Technology
Jiyeon Choi, Baekyung Park, Jinsun Kim, Soyoung Lee, Jichul Ryu, Kyunghyun Kim, Yongseok Kim
Summary: This study estimated pollutant unit loads for different land uses and pollutants based on long-term runoff characteristics and recent environmental changes. Different land uses have different impacts on pollutants, which can be used for managing NPS pollutants and watershed environments.
Article
Engineering, Civil
Patricio X. Lazo, Giovanny M. Mosquera, Irene Cardenas, Catalina Segura, Patricio Crespo
Summary: The study found that Tracer-aided hydrological models (TAHMs) calibrated using high-frequency electrical conductivity (EC) data yielded similar flow partitioning results as models calibrated using high-frequency water stable isotope (18O) data. This suggests that EC can be used as an alternative tracer, reducing the financial resources needed for high-frequency monitoring.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Minyeob Jeong, Dae-Hong Kim, Jongho Kim
Summary: A hybrid method combining dynamic wave approach and instantaneous unit hydrograph (IUH) is proposed in this study to accurately, stably, and instantly predict surface runoff. The method can partially consider the nonlinearity of the rainfall-runoff process, and ends instantly after IUH derivation.
JOURNAL OF FLOOD RISK MANAGEMENT
(2021)
Article
Engineering, Civil
Aleska Kaufmann Almeida, Isabel Kaufmann de Almeida, Jose Antonio Guarienti, Luiz Felipe Finck, Sandra Garcia Gabas
Summary: This study develops a model for estimating the time of concentration (Tc) in non-urban tropical basins, utilizing the Harmony Search algorithm and various statistical techniques for parameter optimization. It accurately estimates Tc in basins with soils that have high to very high runoff potential.
WATER RESOURCES MANAGEMENT
(2023)
Article
Engineering, Civil
Junke Guo
Summary: Unit hydrograph is widely used for predicting flood hydrograph from a known storm. However, its practical applications are cumbersome due to its discreteness and inflexibility. This research aims to find a simple, general, and analytic model for unit hydrograph. Through empirical observations and analysis, the proposed method accurately predicts flood hydrograph and performs better than the classic Nash instantaneous UH model.
JOURNAL OF HYDROLOGIC ENGINEERING
(2022)
Article
Engineering, Civil
Hsin-Fu Yeh, Hsin-Yu Chen
Summary: Taiwan is facing severe disasters such as droughts and floods. Studying the hydrologic response characteristics is crucial for understanding catchment behavior and evaluating river's ability to maintain streamflow. This study divided water flow into four components: fast runoff, intermediate interflow, slow runoff, and dry weather flow, providing a more realistic presentation of the rainfall-runoff process. Results showed that baseflow consisted of intermediate interflow, slow runoff, and dry weather flow. Rainfall intensity was found to be the most important factor affecting streamflow composition. These findings are valuable for establishing rainfall-runoff models and guiding sustainable water resource management.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
Ian M. Simpson, Ryan J. Winston, Jay D. Dorsey
Summary: Urban stormwater is a significant source of non-point source pollution, but there is limited knowledge about stormwater quality in certain geographic regions. This study monitored stormwater quality in 15 watersheds and found that pollutants were mainly generated by specific land uses. Increased rainfall intensity led to higher concentrations of particulate-bound pollutants. Pollutant loads increased with rainfall depth and were influenced by watershed hydrologic responses. The findings highlight the need for cost-efficient stormwater management strategies to combat non-point source pollution and protect surface water quality.
SCIENCE OF THE TOTAL ENVIRONMENT
(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
Computer Science, Interdisciplinary Applications
Minyeob Jeong, Dae-Hong Kim
Summary: In this study, practical and physical interpolation techniques were proposed to obtain a nonlinear instantaneous unit hydrograph (IUH) for diverse rainfall intensities in a watershed. The interpolation was achieved by using mass conservation law and power-law relationships between rainfall intensities and peak flow and time to peak of IUHs. The proposed technique was successfully applied to three real watersheds and the prediction results showed high accuracy.
JOURNAL OF HYDROINFORMATICS
(2023)
Article
Environmental Sciences
Dawei Yu, Liu Dian, Yonglong Hai, Mark T. Randall, Li Liu, Jibao Liu, Junya Zhang, Xiang Zheng, Yuansong Wei
Summary: This study investigates the effects of temporal evolution of rainfall on urban sewer systems. By analyzing rainfall characteristics in different temporal scales, overflow-risk identification and assessment are achieved. The results show that rainfall, urbanization, and sediments are the major driving forces for long-term CSO pollutants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Water Resources
Taotao Zhang, Yang Xiao, Dongfang Liang, Hongwu Tang, Junzeng Xu, Saiyu Yuan, Nairu Wang, Bin Luan
Summary: A two-dimensional physically based model using the concept of a 'control layer' has been developed for studying dissolved pollutant transport in urban environments. Experimental validation shows good agreement between model predictions and observations, supporting the assumption of constant control layer depth. The depth of the control layer, rainfall intensity, surface roughness, and area length are dominant factors affecting dissolved pollutant transport.
HYDROLOGICAL PROCESSES
(2021)
Article
Environmental Sciences
Qiuying Lai, Jie Ma, Wei Du, Yidan Luo, Dawei Ji, Fei He
Summary: This study aimed to examine the pollution characteristics of rainfall runoff and the runoff scouring effect and pollution traceability in adjacent new and old urban areas. Sampling and monitoring of rainfall runoff were conducted for different underlying surfaces. The concentration of COD and nutrients in the rainfall runoff of the market area was higher than that of other areas. The results showed that the market and other service facilities had a significant impact on the calculation of runoff pollution load.
Article
Environmental Sciences
Martin Gauch, Frederik Kratzert, Oren Gilon, Hoshin Gupta, Juliane Mai, Grey Nearing, Bryan Tolson, Sepp Hochreiter, Daniel Klotz
Summary: Building accurate rainfall-runoff models is crucial in hydrological science and practice. In this study, expert opinions were compared with quantitative metrics, and it was found that experts generally agreed with the metrics and showed a preference for Machine Learning models over traditional hydrological models. Although there were inconsistencies in expert opinions, where there was agreement, the opinions could be predicted from the quantitative metrics.
WATER RESOURCES RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Linhan Yang, Jianzhu Li, Keke Zhou, Ping Feng, Lixin Dong
Summary: This study monitored five rainfall events to clarify the characteristics of land surface pollution and pollution variation in urban rivers. The simulated results showed that with an increase in return period, the volume of runoff increased while the concentration of pollutants decreased, mainly due to dilution effects and reduced residence time of pollutants in rivers.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Computer Science, Artificial Intelligence
Mike Spiliotis, Luis Garrote
Summary: A methodology using fuzzy linear regression model was developed to handle uncertainties in unit hydrograph rainfall-runoff transformation. The model showed promising results in individual storm events, but further consideration of multiple storms is needed to increase its applicability.
Article
Physics, Multidisciplinary
Ying Dai, Lei Chen, Pu Zhang, Yuechen Xiao, Zhenyao Shen
Article
Engineering, Civil
Y. Dai, L. Chen, P. Zhang, Y. C. Xiao, X. S. Hou, Z. Y. Shen
JOURNAL OF HYDROLOGY
(2019)
Article
Engineering, Civil
Jiali Qiu, Zhenyao Shen, Guoyong Leng, Hui Xie, Xiaoshu Hou, Guoyuan Wei
JOURNAL OF HYDROLOGY
(2019)
Article
Engineering, Civil
Guowangchen Liu, Lei Chen, Guoyuan Wei, Zhenyao Shen
JOURNAL OF HYDROLOGY
(2019)
Article
Ecology
Jiali Qiu, Zhenyao Shen, Xiaoshu Hou, Hui Xie, Guoyong Leng
ECOLOGICAL ENGINEERING
(2020)
Article
Environmental Sciences
Pu Zhang, Lei Chen, Xiaoshu Hou, Guoyuan Wei, Xiaoyue Zhang, Zhenyao Shen
Article
Chemistry, Multidisciplinary
Zhen-Long Tu, Zhi-Ping Yan, Xiao Liang, Lei Chen, Zheng-Guang Wu, Yi Wang, You-Xuan Zheng, Jing-Lin Zuo, Yi Pan
Article
Environmental Sciences
Hui Xie, Tiantian Gao, Nengsheng Wan, Zhuyang Xiong, Jianwei Dong, Chen Lin, Xijun Lai
Summary: The study analyzed data from an automatic water quality monitoring station in a typical agricultural catchment in China to understand the patterns and controls of riverine nitrogen and phosphorus export. The results showed a significant decreasing trend in nitrogen and phosphorus concentration, with rainfall and temperature playing a role in their variations. Human activities such as fertilization and agricultural drainage also influenced nutrient loading.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Review
Environmental Sciences
Mingjing Wang, Lei Chen, Lei Wu, Liang Zhang, Hui Xie, Zhenyao Shen
Summary: This paper reviews the progress in the development of non-point source (NPS) models and proposes a systematic description of model framework, identifies common challenges, and summarizes future directions. The challenges include limitations in understanding specific NPS pollution processes, model expansion to different scales, data scarcity, prediction uncertainty, and insufficient accuracy for decision-making. The future directions for NPS model development include establishing a source-flow-sink framework, standardizing model input and parameter, and providing reliable decision support.
Article
Chemistry, Multidisciplinary
Lei Chen, Kuangshi Sun, Donghao Hu, Xianlong Su, Linna Guo, Jiamiao Yin, Yuetian Pei, Yiwei Fan, Qian Liu, Ming Xu, Wei Feng, Fuyou Li
Summary: Photochemical afterglow systems have attracted significant attention for their adjustable photophysical properties and potential applications. However, conventional photochemical afterglow lacks repeatability due to the consumption of energy cache units. In this study, we propose a novel strategy to achieve repeatable photochemical afterglow through the reversible storage of O-1(2). This strategy enables the generation of near-infrared afterglow with a lifetime over 10 s, and its initial intensity remains stable over 50 excitation cycles. Mechanism study confirms the repeatable photochemical afterglow is realized through singlet oxygen-sensitized fluorescence emission. The generality of this strategy is demonstrated, allowing for tunable afterglow lifetimes and colors through rational design. Furthermore, the repeatable photochemical afterglow is applied for attacker-misleading information encryption, providing repeatable readout.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Environmental Sciences
Jia Liu, Chunlin Xia, Hui Xie, Xiaodong Wang, Yinguo Qiu
Summary: In recent years, frequent algal blooms in nearshore zones of eutrophic lakes and reservoirs have posed a serious threat to regional water supply security. This paper proposes a binocular video surveillance system for accurate monitoring and extraction of algal blooms, by intelligently distinguishing water and non-water regions and eliminating interference from onshore vegetation.
Article
Chemistry, Organic
Alma R. Perez, Evan C. Bornowski, Lei Chen, John P. Wolfe
Summary: The synthesis of indanes containing substituted cyanomethyl groups at C2 has been achieved through Pd-catalyzed coupling reactions. Alkenyl triflates were used to generate partially saturated analogues via similar transformations. The use of a preformed BrettPhosPd(allyl)(Cl) complex as a precatalyst was crucial for the success of these reactions.
Article
Environmental Sciences
Chaoxu Luan, Renzhi Liu, Jing Sun, Shangren Su, Zhenyao Shen
Summary: An improved land-use simulation model with dynamically nested ecological spatial constraints was developed in this study, considering multilevel ecological spatial constraints and factors such as urban development, agricultural production, and ecological function. The results showed that considering ecological protection red line, capital farmland, and urban development land-use suitability led to a more compact built-up land distribution in Changchun. This model provides more accurate support for the efficient use of land resources and future territorial spatial planning.
Article
Environmental Sciences
Jingyu Wang, Xuehui Zhou, Shuai Wang, Lei Chen, Zhenyao Shen
Summary: The implementation of grey and green infrastructure retrofitting in urban areas can effectively reduce flooding and nonpoint source pollution. Through simulations and monetization methods, this study evaluated the comprehensive benefits of such renovation. The results showed significant reductions in overflow nodes, overflow volume, and nonpoint source pollution levels. The annual benefits of grey and green infrastructure renovation were substantial, with the benefits of green facilities surpassing those of grey facilities.
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)
