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
Environmental Sciences
Grey R. Evenson, Margaret Kalcic, Yu-Chen Wang, Dale Robertson, Donald Scavia, Jay Martin, Noel Aloysius, Anna Apostel, Chelsie Boles, Michael Brooker, Remegio Confesor, Awoke Teshager Dagnew, Tian Guo, Jeffrey Kast, Haley Kujawa, Rebecca Logsdon Muenich, Asmita Murumkar, Todd Redder
Summary: Using an ensemble of models to simulate critical source areas (CSAs) at the watershed scale, the study found that CSA locations are highly uncertain and may vary substantially across models, with only a subset of CSAs being consistently identified by different models.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
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
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
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
Karen Stainbrook, Cameron Ross, Cassandra Davis, Lauren Townley
Summary: The New York State Department of Environmental Conservation (DEC) has developed the Loading Estimator of Nutrient Sources (LENS) tool to support clean water planning and prioritize waterbodies with excessive phosphorus levels. LENS is an Excel based tool that combines several simple steady state models to estimate phosphorus sources, waterbody response, and recovery potential. Validation comparisons with complex watershed models showed that LENS performs reasonably well in estimating relative phosphorus loading.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Civil
Guowangchen Liu, Lei Chen, Wenzhuo Wang, Mingjing Wang, Yuhan Zhang, Jiaqi Li, Chen Lin, Junfeng Xiong, Qing Zhu, Yong Liu, Hui Zhu, Zhenyao Shen
Summary: Balancing clean water and economic growth remains a challenge for achieving the Sustainable Development Goals (SDGs) set by the United Nations. This study proposes a new watershed management framework (WAM-SDGs) that integrates water quality impacts and cost-effectiveness analysis of catchment actions. The method was tested in two catchments in China, showing improved cost-effectiveness and reliability compared to traditional methods. Priority should be given to urban catchments for water quality improvement, while agricultural catchments are more cost-effective.
JOURNAL OF HYDROLOGY
(2023)
Article
Computer Science, Interdisciplinary Applications
Lise R. Montefiore, Natalie G. Nelson
Summary: This study investigated the scalability and predictive ability of a simple model compared to a more complex model in terms of runoff-driven nutrient loading across watersheds. The results showed that the STEPLgrid model produced comparable estimates of nitrogen and phosphorus loads to the SPARROW model for most watersheds studied, with its predicted loads being more similar to SPARROW for nitrogen. STEPLgrid was particularly effective at rank ordering watersheds by nitrogen and phosphorus loads, indicating its usefulness for relative comparisons across diverse watersheds.
ENVIRONMENTAL MODELLING & SOFTWARE
(2022)
Article
Environmental Sciences
Yanting Hu, Zisheng Xing, Fu Zhang, Qing Tian, Nasem Badreldin, Jinmei Zhao
Summary: Agriculture-related nonpoint source pollution is a global issue, and estimating pollutant sources at the basin scale remains challenging. This study analyzed the impact of different land uses on water quality using long-term observational data and identified significant pollutants. Pollutants were mainly discharged through hillslope areas, and pollutant concentrations varied with pollutants and land uses. Implementing soil and water conservation measures can mitigate pollutants to some extent.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Jin Liu, Tiezhu Yan, Jianwen Bai, Zhenyao Shen
Summary: This study investigates the sources and transport processes of nutrients in the urbanized Beiyun River Watershed and reveals the impact of landscape patterns on nutrient transport. The introduction of landscape metrics improves the accuracy of simulation results. The findings are significant for developing effective nutrient control measures.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
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
Engineering, Civil
Valerie Kelly, Edward G. Stets, Charlie Crawford
JOURNAL OF HYDROLOGY
(2015)
Article
Engineering, Environmental
E. G. Stets, V. J. Kelly, C. G. Crawford
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2015)
Article
Engineering, Environmental
Ana Maria Garcia, Richard B. Alexander, Jeffrey G. Arnold, Lee Norfleet, Michael J. White, Dale M. Robertson, Gregory Schwarz
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2016)
Article
Engineering, Civil
Casey J. Lee, Robert M. Hirsch, Gregory E. Schwarz, David J. Holtschlag, Stephen D. Preston, Charles G. Crawford, Aldo V. Vecchia
JOURNAL OF HYDROLOGY
(2016)
Article
Engineering, Environmental
Brian A. Pellerin, Brian A. Bergamaschi, Robert J. Gilliom, Charles G. Crawford, JohnFranco Saraceno, C. Paul Frederick, Bryan D. Downing, Jennifer C. Murphy
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2014)
Article
Environmental Sciences
Wesley W. Stone, Charles G. Crawford, Robert J. Gilliom
JOURNAL OF ENVIRONMENTAL QUALITY
(2013)
Article
Engineering, Civil
David C. Roman, Richard M. Vogel, Gregory E. Schwarz
JOURNAL OF HYDROLOGY
(2012)
Article
Engineering, Environmental
John W. Brakebill, Scott W. Ator, Gregory E. Schwarz
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2010)
Article
Engineering, Environmental
Tanja N. Williamson, Charles G. Crawford
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2011)
Article
Engineering, Environmental
David A. Saad, Gregory E. Schwarz, Dale M. Robertson, Nathaniel L. Booth
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2011)
Article
Engineering, Environmental
Gregory E. Schwarz, Richard B. Alexander, Richard A. Smith, Stephen D. Preston
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2011)
Article
Engineering, Environmental
Dale M. Robertson, David A. Saad, Gregory E. Schwarz
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2014)
Article
Environmental Sciences
E. G. Stets, V. J. Kelly, C. G. Crawford
SCIENCE OF THE TOTAL ENVIRONMENT
(2014)