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
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
Engineering, Environmental
Xiaomei Xu, Xueting Zeng, Yongping Li, Chunrong Wang, Lei Yu, Guohe Huang, Junlong Zhang, Juan Feng, Xinyu Han
Summary: The study establishes a Bayesian simulation-based multi-watershed effluent trading designing model, which can reflect parameter uncertainties in nutrient simulation, reveal detailed optimal trading schemes under the impact of uncertainties and vital factors, and identify optimal effluent trading mechanisms through revealing interaction among trading processes of multiple watersheds. The results provide a solid scientific basis for nonpoint source pollution management as well as effective sustainable development for multi-watershed region.
STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT
(2022)
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
Green & Sustainable Science & Technology
Jinsun Kim, Jiyeon Choi, Minji Park, Joong-Hyuk Min, Jong Mun Lee, Jimin Lee, Eun Hye Na, Heeseon Jang
Summary: This study successfully identified priority management areas in rural watersheds by quantifying key factors controlling nonpoint source pollution, and effectively reduced pollutant concentrations through the implementation of constructed wetlands.
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
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
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
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
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
Engineering, Civil
Shuping Wang, Qian Tan, Chunhui Li, Shan Zhang, Tianyuan Zhang
Summary: The implementation of best management practices (BMPs) is crucial for protecting and restoring watersheds from nonpoint source pollution. Few studies have optimized the ratio between pollution reduction and cost in BMP placement plans. To address this gap, a simulation-based model called SICMFP was proposed, which integrates different models to optimize conflicting objectives and handle uncertain parameters.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Xiaoyue Zhang, Lei Chen, Guowangchen Liu, Yu Yu, Yukun Ma, Zhenyao Shen
Summary: The study quantified watershed responses to SSM in an urbanizing watershed in China and compared five scenarios. Current SSM design had the greatest negative impact on water quality, while improved SSM design showed significant improvements. Priority management and stricter objectives should be given to urbanizing regions at the watershed scale.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Se Jong Cho, Claudio Klemz, Samuel Barreto, Justus Raepple, Henrique Bracale, Eileen Andrea Acosta, Carlos Andres Rogeliz-Prada, Bruna S. Ciasca
Summary: This study presents a collaborative modeling process used in the Cantareira Water Supply System in Sao Paulo City Metropolitan Area, Brazil. The system faces challenges due to increasing water demand and the combined impact of land-use and climate change on its water cycle. Stakeholder engagement involving scientists, policymakers, the water utility company, and state administration was used to develop environmental simulation models to address the complex water resources management problem. The study includes estimation of biophysical and economic benefits associated with native vegetation restoration activities in the source watersheds, which support landscape planning and decision-making processes involving multiple stakeholders.
Article
Environmental Sciences
Saeed Najafi, Seyed Hamidreza Sadeghi, Tobias Heckmann
Summary: The study investigates sediment connectivity based on structural and functional aspects, showing that high structural connectivity does not necessarily lead to high sediment transportation. Structural connectivity reflects the potential for sediment transfer between specific source and sink areas, while functional connectivity occurs where soil erosion processes are actively eroding sediment.
LAND DEGRADATION & DEVELOPMENT
(2021)
Article
Environmental Sciences
Se Jong Cho, Christian A. Braudrick, Christine L. Dolph, Stephanie S. Day, Brent J. Dalzell, Peter R. Wilcock
Summary: The study developed a methodological framework for estimating watershed-scale near-channel sediment loading using stream gaging data, providing a predictive basis for evaluating the impacts of runoff and river discharge increases on near-channel sediment supply. Application of this method includes evaluating conservation trade-offs, measuring benefits of landscape management practices in terms of reduction in downstream near-channel sediment loading in incised river corridors.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Electrical & Electronic
Shen Wang, Ningkun Zheng, Cynthia D. Bothwell, Qingyu Xu, Saamrat Kasina, Benjamin F. Hobbs
Summary: As more variable renewable energy and energy storage facilities are installed, accurate quantification of their contributions to system adequacy becomes crucial. This paper proposes a definition of capacity credit for valuing adequacy contributions of these resources based on their marginal capability to reduce expected unserved energy. The results show that implementing accurate CC can eliminate technology and system cost distortions.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2022)
Article
Energy & Fuels
Binghui Li, Cong Feng, Carlo Siebenschuh, Rui Zhang, Evangelia Spyrou, Venkat Krishnan, Benjamin F. Hobbs, Jie Zhang
Summary: This study proposes a weather-informed method for estimating ramping needs, using forecasts from multiple sites and numerical classifiers to consider system-level weather conditions. Compared to baseline methods, this approach reduces system ramping requirements, improving both system reliability and economics.
Article
Health Care Sciences & Services
Micajah Z. McGarity, Christopher N. Herndon, John A. Harris, Benjamin F. Hobbs
Summary: Satellite clinics have a certain impact on reducing geographic barriers to access ART, but most satellite clinics are still located close to the main clinic of other practices. Only a small proportion of satellite clinics are located in areas without a main clinic.
BMC HEALTH SERVICES RESEARCH
(2022)
Article
Environmental Sciences
Se Jong Cho, Peter Wilcock, Karen Gran
Summary: This study presents a model that uses high-resolution topography to predict sediment delivery in watersheds. The model can forecast changes in sediment delivery based on changes in sediment sources and considers the storage and delivery of sediment over time.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
F. Hung, B. F. Hobbs, A. McGarity, X. Chen
Summary: This paper presents a modeling framework to assess the economic value of learning in green infrastructure planning and proposes a generalized adaptive planning method that includes multiple degrees of learning. The results from an example based on stormwater management in Philadelphia show that active adaptive planning can achieve substantial cost savings.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Bruna Stein Ciasca, Claudio Klemz, Justus Raepple, Timm Kroeger, Eileen Andrea P. Acosta, Se Jong Cho, Samuel Barreto, Henrique Bracale, Fernando Cesario
Summary: Despite having abundant water resources, Brazil is facing increasing occurrences of extreme hydrological events like droughts and floods. The Sao Paulo Cantareira water supply system (CWSS) presents an opportunity to study the economic benefits of nature-based solutions (NbS) for enhancing water security and mitigating the economic costs of drought. This study examines the potential benefits of a counterfactual NbS land-use scenario compared to the current land use and evaluates the economic viability of NbS investments in the CWSS. The research estimates the economic losses caused by the 2014-2015 drought in Sao Paulo state and assesses the potential cost savings under the NbS scenario, including water supply and carbon sequestration benefits. The results suggest that implementing NbS could have reduced the economic losses of the drought by 28% and that the NbS scenario has a positive net present value for both water supply and carbon sequestration benefits.
Article
Environmental Sciences
Se Jong Cho, Claudio Klemz, Samuel Barreto, Justus Raepple, Henrique Bracale, Eileen Andrea Acosta, Carlos Andres Rogeliz-Prada, Bruna S. Ciasca
Summary: This study presents a collaborative modeling process used in the Cantareira Water Supply System in Sao Paulo City Metropolitan Area, Brazil. The system faces challenges due to increasing water demand and the combined impact of land-use and climate change on its water cycle. Stakeholder engagement involving scientists, policymakers, the water utility company, and state administration was used to develop environmental simulation models to address the complex water resources management problem. The study includes estimation of biophysical and economic benefits associated with native vegetation restoration activities in the source watersheds, which support landscape planning and decision-making processes involving multiple stakeholders.
Article
Geography, Physical
Jabari C. Jones, Jacob B. Stout, Patrick Belmont, Todd L. Blythe, Peter R. Wilcock
Summary: The Diamond Fork River in central Utah, USA has been heavily impacted by transbasin flows, resulting in significant geomorphic changes. The response of the river channel varied depending on valley confinement and watershed position. The removal of flow augmentation has led to static channel conditions on Sixth Water, while the lower Diamond Fork has experienced dynamic shifting and widening of the channel in response to natural floods. Artificial baseflow has limited channel narrowing and vegetation establishment in the lower Diamond Fork.
EARTH SURFACE PROCESSES AND LANDFORMS
(2023)
Article
Environmental Sciences
Arvind Singh, Zi Wu, Peter Wilcock, Efi Foufoula-Georgiou
Summary: This study investigates the influence of bedforms on the transport of bedload tracer particles in rivers. The results demonstrate that bedforms act as primary controls on tracer travel distances and there is a linear relationship between bedform trapping and the ratio of bedform height to tracer grain size. The findings provide important theoretical insights for understanding particle transport.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Eileen Andrea Acosta, Se Jong Cho, Claudio Klemz, Justus Reapple, Samuel Barreto, Bruna Stein Ciasca, Jorge Leon, Carlos Andres Rogeliz-Prada, Henrique Bracale
Summary: This study evaluates six different land cover and land use change scenarios to understand the hydrological impacts of nature-based solutions in the Cantareira Water Supply System. Simulation results show that implementing nature-based solutions can reduce surface runoff, increase ambient storage during the rainy season, and increase overall flow during the dry season. Adopting nature-based solutions can mitigate the impacts of extreme drought conditions and contribute to long-term water security.
Article
Economics
Maxim Bichuch, Benjamin F. Hobbs, Xinyue Song
Summary: We investigate the use of capacity payments and scarcity pricing of energy to ensure resource adequacy in electricity markets. We propose a two-level optimization model that considers market power, energy price caps, and risk tolerance differences among resource types. The model defines second-best capacity payments and examines their impact on generation investment and energy outputs. The lower-level suppliers engage in a Nash game to determine the generation mix, while the upper-level regulator considers consumer welfare and resource adequacy. We introduce an equivalent formulation and identify conditions for the existence of a solution.
Review
Green & Sustainable Science & Technology
Mahdi Mehrtash, Benjamin F. Hobbs, Erik Ela
Summary: Errors in forecasting load and renewable-based generation mean that ISOs must procure sufficient operating reserves to maintain the reliability and security of the system. Scarcity pricing, which involves setting higher prices for reserves and energy during periods of shortages, is an important feature of U.S. electricity markets. The different approaches to scarcity pricing practiced by ISOs have practical implications for prices and incentives.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Green & Sustainable Science & Technology
Cynthia D. Bothwell, Benjamin F. Hobbs
Summary: Capacity planning and resource adequacy assessments often overlook important interactions of weather-based resources by relying on averaging and sampling techniques. We propose a method to evaluate the economic value of information and reliability risk in sustainable systems with high renewable energy generation. Our analysis shows that modeling average renewable outputs instead of hourly coincident samples can result in a 16% increase in system costs and a 38-fold increase in expected unserved energy. Investment recommendations vary significantly based on the years included in the analysis, and selecting the wrong year can lead to increased system costs and failure to meet reliability and renewable design targets.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2023)
Review
Energy & Fuels
Benjamin F. F. Hobbs, Venkat Krishnan, Jie Zhang, Hendrik F. F. Hamann, Carlo Siebenschuh, Rui Zhang, Binghui Li, Li He, Paul Edwards, Haiku Sky, Ibrahim Krad, Evangelia Spyrou, Xin Fang, Yijiao Wang, Q. Xu, Shu Zhang
Summary: Net load uncertainty in electricity spot markets is increasing rapidly. Probabilistic forecasts of wind, solar, and load can be used by system operators and market participants in five general approaches to manage this uncertainty. These approaches include operator situation awareness, resource risk hedging, reserves procurement, definition of contingencies, and explicit stochastic optimization. The paper reviews these approaches and presents a case study on using probabilistic solar forecasts to define reserve needs.
IEEE OPEN ACCESS JOURNAL OF POWER AND ENERGY
(2022)