Article
Environmental Sciences
Alicia Reitz, Erika Hemric, Kimberlee K. Hall
Summary: The study evaluated the influence factors of fecal pollution sources and transport in the Tuckasegee River watershed in Western North Carolina using a multivariate statistical approach, finding that fecal pollution is influenced by factors such as surface runoff, soil erosion, and chemical parameters. Results showed that chemical parameters can serve as effective predictors of fecal pollution, aiding in the identification of pollution sources and development of effective TMDLs.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Xue Zhao, Yi Zheng, Feng Quan, Shiyao Hu, Qingping Wu, Meiyu Luo, Yang Gu, Sijie Tang, Jiping Jiang
Summary: This study reveals that road runoff can be a major pollution source of parabens and their metabolites in rapidly growing cities during the wet season. The concentrations in road runoff were comparable to those in treated wastewater and river water and showed a land use pattern of residential > industrial > commercial.
Article
Environmental Sciences
Zheqi Pan, Minpeng Hu, Hong Shen, Hao Wu, Jia Zhou, Kaibin Wu, Dingjiang Chen
Summary: Increasing evidence suggests that groundwater can contain high dissolved phosphorus concentrations, contributing to potential pollution of surface waters. This study quantified contributions from different sources to riverine phosphorus pollution in an agricultural watershed in eastern China. The study found that groundwater could be a significant source of phosphorus pollution to rivers, emphasizing the importance of controlling groundwater pollution from agricultural lands.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Jong Mun Lee, Minji Park, Bae Kyung Park, Jiyeon Choi, Jinsun Kim, Kyunghyun Kim, Yongseok Kim
Summary: Urbanization leads to increasing impervious areas in watersheds, distorting healthy water circulation systems. This study tested impervious area management goals using the HSPF watershed model, finding that reducing impervious cover can improve water circulation rate, decrease direct runoff and nonpoint source load.
Article
Green & Sustainable Science & Technology
Xiaoran Fu, Jiahong Liu, Chao Mei, Qinghua Luan, Hao Wang, Weiwei Shao, Pingping Sun, Yunchao Huo
Summary: This study constructed an urban water quantity/quality model to evaluate the distribution characteristics of non-point source pollution based on 12 typhoon rainfall events. The results showed that peak concentration time mostly occurred after peak rainfall time, and EP rainstorm events were more likely to cause severe NPS pollution. Additionally, pollution load intensity was strongly correlated with urbanized land-use, with midstream watershed showing higher PLI compared to other watersheds.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Green & Sustainable Science & Technology
Xiaoran Fu, Jiahong Liu, Chao Mei, Qinghua Luan, Hao Wang, Weiwei Shao, Pingping Sun, Yunchao Huo
Summary: Extreme climate conditions, such as typhoon rainfall events, have significant impacts on non-point source pollution in urban areas. Early pattern rainstorm events may lead to more severe pollution, while urbanized land-use greatly affects pollution load intensity. The research findings provide valuable insights for designing effective strategies to mitigate rainfall-runoff pollution in coastal urban watersheds in China.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Jing Huang, Ruimin Liu, Qingrui Wang, Xiang Gao, Zhenyu Han, Jiameng Gao, Hui Gao, Sibo Zhang, Junfeng Wang, Ling Zhang, Xinghui Xia
Summary: This study used the SWAT model and modified SWAT-N2O coupler to investigate the impact of climate factors on the migration, transformation, and emissions of nonpoint source nitrogen and N2O in an agricultural watershed. The findings show that temperature has a more significant effect on N2O emissions compared to precipitation, with N2O emissions increasing with temperature. Additionally, precipitation initially enhances N2O emissions due to increased moisture, but emissions decrease when precipitation exceeds a certain threshold. Under different climate change scenarios, increasing temperatures will lead to a rise in N2O emissions.
Article
Environmental Sciences
Linnea Saby, Jacob D. Nelson, Lawrence E. Band, Jonathan L. Goodall
Summary: The research parameterized the landscape-scale patterns of an emerging NPS WQT market in Virginia, examined the impacts and integration of the program with statewide watershed management goals. Results showed how the program has influenced water quality BMPs transfer and identified opportunities for improved integration with state priorities. Suggestions were made for policy and management actions to increase integration and enhance environmental returns from NPS WQT.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Jianxu Han, Zhuohang Xin, Feng Han, Bo Xu, Longfan Wang, Chi Zhang, Yi Zheng
Summary: Addressing nutrient pollution problems at the watershed scale remains a challenge, but source contribution analysis based on watershed modeling can help identify major pollution sources. In this study, crop production and trans-administrative wastewater discharge were found to be the dominant sources of nutrient pollution, leading to recommendations to reduce N fertilizer application rate for better water quality and environmental protection. The study highlights the importance of considering source attribution, fertilizer application, and legacy P impacts in agriculture-dominated watersheds.
ENVIRONMENTAL POLLUTION
(2021)
Article
Meteorology & Atmospheric Sciences
Shiva R. Iyer, Ananth Balashankar, William H. Aeberhard, Sujoy Bhattacharyya, Giuditta Rusconi, Lejo Jose, Nita Soans, Anant Sudarshan, Rohini Pande, Lakshminarayanan Subramanian
Summary: This paper presents a high-precision spatio-temporal prediction model that can be used to generate fine-grained pollution maps. By utilizing low-cost sensor network data, the model achieves high predictive accuracy despite high data variability and intermittent data availability. These accurate fine-grained pollution sensing maps provide a way forward for the development of citizen-driven low-cost monitoring systems.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Shaojun Tan, Deti Xie, Jiupai Ni, Fangxin Chen, Chengsheng Ni, Jing'an Shao, Jinliang Wang, Dun Zhu, Sheng Wang, Ping Lei, Jingyi Wang, Jianfeng Xu
Summary: In this study, the Qijiang River Basin in the Three Gorges Reservoir area was used to identify the source/sink pattern of nonpoint source pollution (NPSP). The results showed that the source landscape mainly distributed in the northern hilly area, while the sink landscape mainly concentrated in the southern mountain area. There was a significant correlation between soil erosion and the landscape index, and a certain relationship between water quality and the landscape index.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Biodiversity Conservation
Ping Lan, Li Guo, Hailong Sun, Yaling Zhang, Yanjia Jiang
Summary: The integration of artificial neural networks (ANNs) into water resource vulnerability assessment enhances accuracy by pinpointing key factors. The study used ANNs to simulate monthly stream baseflow nitrate concentrations, and found that they outperformed traditional regression methods in explaining variance and external predictions.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Sciences
Seyedeh Zeinab Shogrkhodaei, Seyed Vahid Razavi-Termeh, Amanollah Fathnia
Summary: The study focused on the Spatio-temporal modeling and preparation of PM2.5 risk mapping in the urban area of Tehran, Iran. Different parameters' importance and impacts were analyzed under seasonal variations.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Kinga Wieczorek, Anna Turek, Malgorzata Szczesio, Wojciech M. Wolf
Summary: Surface water pollution can lead to serious ecological disasters, such as large-scale fish deaths due to excessive salinity, which is a global problem. Regular monitoring of main rivers and their tributaries is necessary to prevent such situations. However, the current monitoring system is not adaptable to the variability associated with the diversified use of catchments and changing climatic conditions. This study focuses on the Bzura River and assesses the chemical status of its catchment. The results show that the water quality indices of the tributaries are higher than that of the Bzura River, indicating that the Bzura River may be polluted by its tributaries under favorable climatic and hydrological conditions. Therefore, smaller watercourses should be included in monitoring and become more important in addressing the global problem of surface water pollution.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Green & Sustainable Science & Technology
Patricia Maldonado-Salguero, Maria Carmen Bueso-Sanchez, Angel Molina-Garcia, Juan Miguel Sanchez-Lozano
Summary: This study proposes a methodology to characterize and cluster spatio-temporal solar resource variability through global horizontal irradiance analysis. The study selected Spain as a case study and evaluated spatial variability and geographical clustering differences of solar resources in different time windows. The research findings contribute to understanding the spatiotemporal variations of solar resources in Spain.
Article
Computer Science, Interdisciplinary Applications
Pezhman Mousavi-Mirkalaei, Abbas Roozbahani, Mohammad Ebrahim Banihabib, Timothy O. Randhir
Summary: Forecasting urban water consumption is crucial for efficient management in rapidly growing cities in arid regions. Comparing Bayesian Networks and Gene Expression Programming models, the study finds that Bayesian Networks provide better accuracy in predicting urban water consumption. Additionally, sunshine hours have a significant influence on water consumption.
EARTH SCIENCE INFORMATICS
(2022)
Article
Education & Educational Research
Alberto Mendez-Morales, Rafael Ochoa-Urrego, Timothy O. Randhir
Summary: This study created a quality index for university patents by using variables including patent production, technical relevance, use of top knowledge, technological scope, cooperation, and internationalization. Results showed that Brazilian universities had higher quality patents compared to their peers, with Universidad Tecnologica de Panama ranked first in 2016. This index is the first of its kind in the region and can complement international university rankings by measuring a dimension previously not considered.
STUDIES IN HIGHER EDUCATION
(2022)
Article
Plant Sciences
Alaaeldin A. Helaly, Emad Mady, Emad A. Salem, Timothy O. Randhir
Summary: Using beneficial bacteria to promote plant growth is an eco-friendly approach that can increase crop yields, improve plant growth and nutrition, and enhance the nutritional and antioxidant content of plants.
JOURNAL OF PLANT NUTRITION
(2022)
Article
Environmental Sciences
Saeed Mozaffari, Saman Javadi, Hamid Kardan Moghaddam, Timothy O. Randhir
Summary: This study develops a new index and model for assessing and predicting the quality of groundwater resources. The index is used to determine three water quality classes for drinking water and the model predicts the groundwater quality. The results show that factors such as temperature and precipitation have minimal impact on groundwater quality prediction, while the previous month's groundwater quality index, recharge, and discharge have the most influence.
WATER AND ENVIRONMENT JOURNAL
(2022)
Article
Engineering, Civil
Saeed Mozaffari, Saman Javadi, Hamid Kardan Moghaddam, Timothy O. Randhir
Summary: A simulation-optimization hybrid model using the PSO algorithm was developed to forecast groundwater levels in aquifers. The model outperformed other models in terms of RMSE and R 2 , providing a reliable tool for decision support and management of similar aquifers.
WATER RESOURCES MANAGEMENT
(2022)
Article
Engineering, Environmental
Ramy S. Nada, Ashmawi E. Ashmawi, Emad Mady, Timothy O. Randhir, Ahmed A. Elateeq
Summary: This study aimed to enhance the productivity and quality attributes of bulb fennel through the use of different fertilizers. The results showed that the application of organic fertilizer and biofertilizer led to higher bulb yield and nutritional value, while reducing the content of undesirable compounds like estragole.
JOURNAL OF ECOLOGICAL ENGINEERING
(2022)
Article
Water Resources
Amir Hatamkhani, Ali Moridi, Timothy O. Randhir
Summary: Hydropower projects require an efficient cost-benefit framework and optimization model for proper development. However, the environmental impacts of dams and hydropower plants are often overlooked in economic calculations and planning, leading to the loss of natural resources. This research aims to incorporate environmental impacts into decision-making through a comprehensive simulation-optimization model. The results demonstrate the importance of considering these impacts for achieving sustainable development and management.
HYDROLOGY RESEARCH
(2023)
Article
Biology
Rasha M. Alnefaie, Sahar A. EL-Sayed, Amany A. Ramadan, Ahmed I. Elmezien, Ahmed M. El-Taher, Timothy O. Randhir, Ahmed Bondok
Summary: This study assessed the efficacy of chemical inducers, such as salicylic acid, oxalic acid, nicotinic acid, and benzoic acid, in controlling foliar diseases in Vicia faba plants. The foliar spray of these phenolic acids significantly decreased disease severity and enhanced the defense system of treated plants through increased antioxidant enzyme activity. Additionally, foliar spray with natural organic acids expedited recovery from fungal infection.
Article
Green & Sustainable Science & Technology
Rihab M. Omer, Heba M. Hewait, Emad Mady, Sawsan K. M. Yousif, Ebtesam A. Gashash, Reena Randhir, Ashmawi E. Ashmawi, Ahmed M. El-Taher, Nadi A. Al-Harbi, Timothy O. Randhir
Summary: This study assessed the benefits of using microbial fertilizers as an eco-friendly alternative to chemical fertilizers in cowpea plants. The results showed that the B + C + Y mixture had a significant positive impact on enzyme activity, plant growth parameters, and yield characteristics in cowpea. An integrated nutrient management program using biofertilizers is recommended for higher yields and environmentally safe production of cowpea.
Article
Geosciences, Multidisciplinary
Omid Memarian Sorkhabi, Jamal Asgari, Timothy O. Randhir
Summary: Improper abstraction of groundwater in Iran has led to an average annual subsidence rate of 15 cm/yr. The management of Iran's water resources is essential due to its arid and semiarid climate and traditional agriculture. Monitoring groundwater storage changes and their correct interpretation using deep learning methods can improve our understanding of groundwater systems.
NATURAL RESOURCES RESEARCH
(2023)
Article
Agronomy
Hossam S. El-Beltagi, Ramy S. Nada, Emad Mady, Ashmawi E. Ashmawi, Ebtesam Abdullah Gashash, Ahmed A. Elateeq, Ahmad A. Suliman, Nadi Awad Al-Harbi, Salem Mesfir Al-Qahtani, Mostafa M. Zarad, Timothy O. Randhir
Summary: This study aimed to enhance fruit yield and essential oil quality of fennel fruits by reducing estragole through different fertilizer treatments. The results showed that fertilizers increased fruit and essential oil yield, as well as total phenolic and flavonoid content. NPK at 150% of recommended dose and rabbit manure at 60 m³/acre recorded the highest values. Organic and bio-fertilizers resulted in higher content of desired compounds like trans-anethole and inhibited estragole formation.
Review
Biodiversity Conservation
Kaline de Mello, Ricardo Hideo Taniwaki, Diego Rodrigues Macedo, Cecilia Gontijo Leal, Timothy O. Randhir
Summary: This paper qualitatively reviews biomonitoring studies in freshwater ecosystems to evaluate the impact of different land use types on multiple scales in watersheds. The paper is organized into four sections, presenting biomonitoring in different freshwater systems, describing the characteristics of the main land use types, explaining the influence of spatial and temporal scales, and focusing on biomonitoring planning and future prediction. The review will assist in decision-making regarding biomonitoring programs in watersheds and guide future studies on bioindicators for various land use types in diverse ecosystems worldwide.
Article
Agronomy
Emad Mady, Ahmed H. M. Abd El-Wahed, Asaad H. Awad, Turky O. Asar, Ammar Al-Farga, Hany S. Abd El-Raouf, Reena Randhir, Ehab S. Alnuzaili, Ahmed M. El-Taher, Timothy O. Randhir, Fatma A. Hamada
Summary: Salt stress can have a negative impact on the growth and yield of eggplant plants, but using 1.0 mM salicylic acid (SA) foliar spray can alleviate this impact and increase the overall yield of eggplants.
Article
Engineering, Civil
Timothy O. Randhir, Keith Toffling, Curtice R. Griffin
Summary: Climate change has significant impacts on mangrove wetlands, with red and black mangroves being the most affected. Decreased precipitation can negatively affect all species, with red, black, and white mangroves showing a decrease in growth suitability for each one mm reduction in precipitation. Variability in climatic variables also significantly impacts mangroves. These results highlight the importance of protecting mangrove ecosystems for the sustainability of coastal ecosystems.
SUSTAINABLE AND RESILIENT INFRASTRUCTURE
(2023)
Article
Plant Sciences
Ahmed M. El-Taher, Hala A. Elzilal, Hany S. Abd El-Raouf, Emad Mady, Khalid S. Alshallash, Rasha M. Alnefaie, Ehab M. B. Mahdy, Osama G. Ragab, Elhassan A. Emam, Ibrahim A. Alaraidh, Timothy O. Randhir, Mohamed F. M. Ibrahim
Summary: The study characterized five local taxa of the genus Cichorium using morphological and molecular markers, revealing variations in leaf and cypsela characteristics. Molecular markers were useful for taxonomic authentication and could support genetic improvement of chicory.
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)