Article
Environmental Sciences
Neil Fuller, Sara E. Anzalone, Kara E. Huff Hartz, Gregory W. Whitledge, Shawn Acuna, Jason T. Magnuson, Daniel Schlenk, Michael J. Lydy
Summary: This study investigated the distribution of pesticides in two important salmon habitats in the Sacramento River watershed. The results showed that the floodplain had significantly higher concentrations of organochlorines compared to the mainstem Sacramento River, and juvenile fish in the floodplain may be more exposed to organochlorines than fish in the river. Additionally, high flow conditions may exacerbate pesticide exposure for fish and other biota.
Article
Environmental Sciences
Maria Murcia-Morales, Flemming Vejsnaes, Robert Brodschneider, Fani Hatjina, Jozef J. M. Van der Steen, Jose Luis Oller-Serrano, Amadeo R. Fernandez-Alba
Summary: The use of APIStrips as a passive sampling approach provides a more accurate and robust detection of pesticide residues in beehives compared to active bee sampling methods.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Subir Kumar Nag, A. M. Sajina, Sanjeev Kumar Sahu, Soma Das Sarkar, Srikanta Samanta, Keya Saha, Sudarsan Bandyopadhyay
Summary: Rivers are polluted by various hazardous substances, including pesticides. Pesticide residues from agricultural fields and domestic sewage water contaminate the water, sediment, and fish in rivers. These residues bio-concentrate and bio-accumulate in aquatic organisms, including fish, which are consumed by humans. However, the presence of pesticides in the river Gomti, a tributary of River Ganga in India, does not pose a direct risk to consumers based on human health risk assessment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Warda Panondi, Norihiro Izumi
Summary: The study found that climate change has led to an increase in precipitation and temperatures in the Pulangi River Basin, resulting in higher sediment yield and runoff, exacerbating the threat of floods and soil erosion.
Article
Environmental Sciences
Philip Janney, Jeffrey Jenkins
Summary: This study evaluates the impact of agricultural practices on salmonid species, food web, and habitat by monitoring pesticides in surface water in Zollner Creek watershed in Oregon, USA. The Soil and Water Assessment Tool (SWAT) model is used to estimate pesticide concentrations in surface water and compared with monitoring data, showing good agreement. The study also presents a method to estimate pesticide surface water concentrations on biologically relevant time scales and determine appropriate grab sampling frequency using the model estimates.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Rafael C. Lajmanovich, Maria R. Repetti, Ana P. Cuzziol Boccioni, Melina P. Michlig, Luisina Demonte, Andres M. Attademo, Paola M. Peltzer
Summary: This study found high concentrations of pesticide residues, especially insecticides, herbicides, and fungicides, in the muscle and viscera of Prochilodus lineatus fish from Santa Fe, Argentina. The high levels of contaminants in the fish tissue indicate potential risks to human health. Periodic monitoring and appropriate measures are necessary to protect the important freshwater fish resources.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Agronomy
Vivek Venishetty, Prem B. Parajuli
Summary: This study analyzes the impact of different management practices on water quality using the Soil and Water Assessment Tool. The results show that the implementation of Vegetative Filter Strips (VFS) and Riparian Buffer can reduce sediment, Total Nitrogen (TN), and Total Phosphorus (TP) yields. Additionally, the use of Cover Crops (CC) such as Rye grass and Winter Wheat (WW) can also contribute to the reduction of streamflow and nutrient yields. These findings provide valuable insights for the agricultural community in improving water quality.
Article
Environmental Sciences
Adam C. Taylor, Graham A. Mills, Anthony Gravell, Mark Kerwick, Gary R. Fones
Summary: This study focused on the pollution of surface water by polar pesticides in river catchments, developing a novel strategy using passive sampling coupled to suspect screening and multivariate analysis. A total of 128 different classes of pesticides were identified using high-resolution liquid chromatography-quadrupole-time-of-flight mass spectrometry. Statistical analysis revealed pesticide sources and fate, prioritizing 61 pesticides for risk assessment and designing a seasonal monitoring program. Incorporating passive sampling coupled to suspect screening into regulatory monitoring could better inform water quality management practices and reduce operational costs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Caleb G. Pan, Peter B. Kirchner, John S. Kimball, Jinyang Du, Michael A. Rawlins
Summary: The study developed a regional snow phenology record using satellite remote sensing, investigating the relationship between snowmelt, spring flood pulse, and river ice breakup in the Yukon River basin. Results showed the potential value of satellite-based snow metrics for regional monitoring and forecasting of the spring flood pulse and river ice breakup timing.
Article
Water Resources
Amimul Ahsan, Sushil K. Das, Md. Habibur Rahman Bejoy Khan, Anne W. M. Ng, Nadhir Al-Ansari, Shakil Ahmed, Monzur Imteaz, Muhammad A. U. R. Tariq, Md. Shafiquzzaman
Summary: Pollution of a watershed by different land uses and agricultural practices is a major challenge that affects water quality, human health, and ecosystems. Sustainable use of water resources requires reducing Non-Point Source (NPS) pollutants through best management practices (BMPs). The use of a hydrologic model like SWAT helps analyze the impact of various BMPs and determine the best combination for water quality improvement.
APPLIED WATER SCIENCE
(2023)
Article
Multidisciplinary Sciences
Tamene Adugna Demissie
Summary: This study evaluates the impact of climate change on hydrological components of Gilgel Gibe-1 using ensemble climate models. The models perform well in simulating rainfall and temperature. The future projections indicate an increase in rainfall and temperature in the study area. The calibrated SWAT model shows an expected increase in surface runoff and sediment yield.
Article
Engineering, Civil
Tufa Feyissa Negewo, Arup Kumar Sarma
Summary: Erosion of topsoil is a significant global environmental issue, especially impacting agricultural and upland areas. The Soil and Water Assessment Tool (SWAT) model is utilized to simulate streamflow, sediment load, and identify spatial and temporal variability in sediment yield, helping prioritize areas for erosion management. Analysis revealed substantial variations in sediment yield among sub-basins, emphasizing the importance of targeted erosion control measures.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Bakkiyalakshmi Palanisamy, Balaji Narasimhan, Sabu Paul, Raghavan Srinivasan, Winai Wangpimool, Sopheap Lim, Rattykone Sayasane
Summary: This study aims to identify extreme precipitation deficits in the Mekong River Basin using the Percent Normal (PN) index and evaluate their impact on agricultural drought through changes in precipitation, soil moisture, and evapotranspiration anomalies. Results show that the PN index successfully identified historical droughts, supporting the development of drought-resilient agricultural production systems in the basin.
Article
Water Resources
Bakkiyalakshmi Palanisamy, Balaji Narasimhan, Sabu Paul, Raghavan Srinivasan, Winai Wangpimool, Ratino Sith, Rattykone Sayasane
Summary: The Mekong River Basin frequently experiences extreme droughts and floods due to precipitation deficit. Evaluating the deficits in hydrometeorological extremes is important to understand the impacts of drought on soil moisture, agricultural productivity, and surface water resources. This study proposed and applied a streamflow deficit index (SDI) to assess the changes in hydrology caused by fluctuations in precipitation and soil moisture in the Mekong River Basin. The results demonstrated that SDI effectively represented historical river flow deficit and captured the increasing variation in streamflow deficit in parts of Thailand, Lao PDR, Vietnam, and Cambodia.
HYDROLOGICAL PROCESSES
(2023)
Article
Multidisciplinary Sciences
Negash Tessema Roba, Asfaw Kebede Kassa, Dame Yadeta Geleta, Arus Edo Harka
Summary: This study estimated sediment yield and streamflow in the Dawe River watershed, prioritizing catchment sub-watersheds for conservation planning. Statistical methods were used to evaluate the performance of the SWAT model in estimating streamflow and sediment output, with higher sediment output rates observed in agricultural lands with specific soil types and gradients. The implementation of best sediment management scenarios resulted in significant reductions in sediment yield, emphasizing the importance of adopting effective conservation strategies for sediment reduction in the watershed.
Article
Environmental Sciences
Mariela A. Yevenes, Karline Soetaert, Chris M. Mannaerts
Article
Environmental Sciences
Nobuhle P. Majozi, Chris M. Mannaerts, Abel Ramoelo, Renaud Mathieu, Azwitamisi E. Mudau, Wouter Verhoef
Article
Remote Sensing
Nesrine Abid, Zoubeida Bargaoui, Chris M. Mannaerts
INTERNATIONAL JOURNAL OF REMOTE SENSING
(2018)
Article
Environmental Sciences
Yasser Abbasi, Chris M. Mannaerts
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2020)
Article
Environmental Sciences
Megan Blatchford, Chris M. Mannaerts, Yijian Zeng, Hamideh Nouri, Poolad Karimi
Article
Environmental Sciences
Sammy M. Njuki, Chris M. Mannaerts, Zhongbo Su
Article
Environmental Sciences
Nobuhle P. Majozi, Chris M. Mannaerts, Abel Ramoelo, Renaud Mathieu, Wouter Verhoef
Summary: This study analyzed the uncertainty and sensitivity of core and intermediate input variables of a remote-sensing-data-based Penman-Monteith (PM-Mu) evapotranspiration (ET) model. The results showed relatively high uncertainties associated with relative humidity (RH) and the ET algorithm was most sensitive to the air-land surface temperature difference. Accurate assessment of both in situ and remotely sensed variables is crucial for reliable ET model estimates in dry regions and climates. The remote-sensing-based ET method offers a significant advantage of full area coverage compared to classic-point-based estimates.
Article
Chemistry, Analytical
Ruosha Zeng, Chris M. Mannaerts, Zhehai Shang
Summary: This paper investigates the quantitative relationships between water color indices and concentrations of optically active constituents using a low-cost digital camera colorimetry setup. The study found that concentration shows an ascending relationship with xy chromaticity values and a descending relationship with hue angle, thereby increasing the information content of simple water color observations by relating them to chemical constituent concentrations in observed waters.
Article
Environmental Sciences
Sammy M. Njuki, Chris M. Mannaerts, Zhongbo Su
Summary: This study evaluated the impact of different PBL parameterization schemes in the WRF model on four meteorological variables over the Kenyan highlands, finding that the YSU scheme is best suited for simulating surface meteorological variables in the region. The choice of PBL scheme primarily influenced the simulation of 10-meter wind speed and rainfall, rather than temperature and relative humidity.
Article
Environmental Sciences
Juliana Tavora, Mhd. Suhyb Salama, Marloes Penning de Vries, Chris M. M. Mannaerts, Daphne van der Wal
Summary: Suspended Particulate Matter (SPM) is influenced by wind and river discharge, but the relationship between them and their impact on SPM in turbid estuaries is largely unknown. This study uses satellite data and in situ observations to examine the effects of wind and river discharge on SPM in the Scheldt Estuary. Weak but statistically significant correlations were found between SPM and both river discharge and wind speed. The study highlights the importance of these drivers in the estuarine system and suggests the use of complementary instruments to better capture the effects of extreme events.
Article
Green & Sustainable Science & Technology
Amina Abdelkadir Mohammedshum, Chris M. Mannaerts, Ben H. P. Maathuis, Daniel Teka
Summary: This paper characterizes and compares three types of small-scale irrigation scheme practices in Northern Ethiopia. The study reveals significant differences between the three irrigation schemes and emphasizes the need for a multidisciplinary approach to evaluate small-scale irrigation practices and analyze the livelihoods of agricultural smallholders. The findings highlight the importance of considering institutional and socioeconomic factors in addition to biophysical factors when understanding water use, crop yield, and farmer income.
Article
Environmental Sciences
Sammy M. M. Njuki, Chris M. M. Mannaerts, Zhongbo Su
Summary: Surface turbulent heat fluxes are crucial for various hydrological applications. Energy Balance Models (EBMs) are widely used to simulate these fluxes, but most single-source EBMs suffer from uncertainties due to a parameter kB(-1). The commonly used SEBS model underestimates sensible heat flux in tall forests, as it ignores the effect of turbulence on heat transfer. This study presents a revised parameterization for SEBS that significantly reduces the underestimation and is suitable for mapping turbulent heat fluxes under tall forest canopies.
