13 results on '"Al-Zawaidah, Hadeel'
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2. Mapping Microplastic Movement: A Phase Diagram to Predict Nonbuoyant Microplastic Modes of Transport at the Particle Scale
- Author
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Al-Zawaidah, Hadeel, Kooi, Merel, Hoitink, Ton, Vermeulen, Bart, Waldschläger, Kryss, Al-Zawaidah, Hadeel, Kooi, Merel, Hoitink, Ton, Vermeulen, Bart, and Waldschläger, Kryss
- Abstract
Microplastics pose numerous threats to aquatic environments, yet understanding their transport mechanisms remains limited. Drawing from natural sediment research provides valuable insights to address this knowledge gap. One key dimensionless number used to describe sediment transport is the transport stage, referring to the ratio between the flow shear velocity and the particle settling velocity. However, variations in physical properties, such as shape and density, raise concerns about the applicability of existing sediment transport theories to microplastics. To address this challenge, we employed a physical modeling approach, examining 24 different nonbuoyant microplastic particles in a turbulent open channel flow. Utilizing 3D particle tracking, a total of 720 trajectories were recorded and analyzed. Microplastic particles exhibited transport modes akin to natural sediments, including rolling/sliding, saltation, and suspension. The transport stage strongly correlated with these modes, as well as with the mean forward velocity and mean position in the water column. Notably, particle shape emerged as a critical factor influencing transport dynamics. Due to their lower settling velocity, fibers tended to stay closer to the water surface with lower forward velocities compared to spheres. Based on the laboratory results, a new phase diagram for microplastics is introduced analogous to an existing diagram for sediments.
- Published
- 2024
3. Where should hydrology go? An early-career perspective on the next IAHS Scientific Decade: 2023–2032
- Author
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van Hateren, Theresa C. (author), Jongen, Harro J. (author), Al-Zawaidah, Hadeel (author), Beemster, Joris G.W. (author), Boekee, J. (author), Aerts, J.P.M. (author), Agoungbome, David (author), Meshram, S.M. (author), Walraven, B. (author), van Hateren, Theresa C. (author), Jongen, Harro J. (author), Al-Zawaidah, Hadeel (author), Beemster, Joris G.W. (author), Boekee, J. (author), Aerts, J.P.M. (author), Agoungbome, David (author), Meshram, S.M. (author), and Walraven, B. (author)
- Abstract
This paper shares an early-career perspective on potential themes for the upcoming International Association of Hydrological Sciences (IAHS) Scientific Decade (SD). This opinion paper synthesizes six discussion sessions in western Europe identifying three themes that all offer a different perspective on the hydrological threats the world faces and could serve to direct the broader hydrological community: “Tipping points and thresholds in hydrology,” “Intensification of the water cycle,” and “Water services under pressure.” Additionally, four trends were distinguished concerning the way in which hydrological research is conducted: big data, bridging science and practice, open science, and inter- and multidisciplinarity. These themes and trends will provide valuable input for future discussions on the theme for the next IAHS SD. We encourage other early-career scientists to voice their opinion by organizing their own discussion sessions and commenting on this paper to make this initiative grow from a regional initiative to a global movement., Water Resources, Hydraulic Engineering
- Published
- 2023
- Full Text
- View/download PDF
4. Where should hydrology go? An early-career perspective on the next IAHS Scientific Decade: 2023-2032
- Author
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van Hateren, Theresa C; https://orcid.org/0000-0002-1589-6079, Jongen, Harro J; https://orcid.org/0000-0002-7538-4796, Al-Zawaidah, Hadeel; https://orcid.org/0000-0002-4644-3224, Beemster, Joris G W; https://orcid.org/0000-0002-3178-6689, Boekee, Judith; https://orcid.org/0000-0002-1861-2596, Bogerd, Linda; https://orcid.org/0000-0002-7343-4542, Gao, Sijia; https://orcid.org/0000-0001-7050-0527, Kannen, Christin; https://orcid.org/0000-0002-0412-4970, van Meerveld, H J; https://orcid.org/0000-0002-7547-3270, de Lange, Sjoukje I; https://orcid.org/0000-0002-8898-3501, Linke, Felicia; https://orcid.org/0000-0001-7230-0975, Pinto, Rose B; https://orcid.org/0000-0003-4520-9548, Remmers, Janneke O E; https://orcid.org/0000-0002-7594-890X, Ruijsch, Jessica; https://orcid.org/0000-0001-6510-7499, Rusli, Steven R; https://orcid.org/0000-0002-1189-1553, van de Vijsel, Roeland C; https://orcid.org/0000-0002-5615-8101, Aerts, Jerom P M; https://orcid.org/0000-0003-0157-4818, Agoungbome, Sehouevi M D; https://orcid.org/0000-0003-4923-3924, Anys, Markus; https://orcid.org/0000-0001-9643-9939, Blanco Ramírez, Sara; https://orcid.org/0000-0002-9638-6272, van Emmerik, Tim; https://orcid.org/0000-0002-4773-9107, Gallitelli, Luca; https://orcid.org/0000-0002-2188-4584, chiquito Gesualdo, Gabriela; https://orcid.org/0000-0001-6589-3397, Gonzalez Otero, Wendy, Hanus, Sarah; https://orcid.org/0000-0002-5232-6964, He, Zixiao; https://orcid.org/0000-0001-7576-8055, Hoffmeister, Svenja; https://orcid.org/0000-0002-4785-1836, Imhoff, Ruben O; https://orcid.org/0000-0002-4096-3528, Kerlin, Tim; https://orcid.org/0000-0002-0424-6193, Meshram, Sumit M, Meyer Oliveira, Aline; https://orcid.org/0000-0002-7076-4570, Scheller, Mirjam; https://orcid.org/0009-0005-3826-8007, et al, van Hateren, Theresa C; https://orcid.org/0000-0002-1589-6079, Jongen, Harro J; https://orcid.org/0000-0002-7538-4796, Al-Zawaidah, Hadeel; https://orcid.org/0000-0002-4644-3224, Beemster, Joris G W; https://orcid.org/0000-0002-3178-6689, Boekee, Judith; https://orcid.org/0000-0002-1861-2596, Bogerd, Linda; https://orcid.org/0000-0002-7343-4542, Gao, Sijia; https://orcid.org/0000-0001-7050-0527, Kannen, Christin; https://orcid.org/0000-0002-0412-4970, van Meerveld, H J; https://orcid.org/0000-0002-7547-3270, de Lange, Sjoukje I; https://orcid.org/0000-0002-8898-3501, Linke, Felicia; https://orcid.org/0000-0001-7230-0975, Pinto, Rose B; https://orcid.org/0000-0003-4520-9548, Remmers, Janneke O E; https://orcid.org/0000-0002-7594-890X, Ruijsch, Jessica; https://orcid.org/0000-0001-6510-7499, Rusli, Steven R; https://orcid.org/0000-0002-1189-1553, van de Vijsel, Roeland C; https://orcid.org/0000-0002-5615-8101, Aerts, Jerom P M; https://orcid.org/0000-0003-0157-4818, Agoungbome, Sehouevi M D; https://orcid.org/0000-0003-4923-3924, Anys, Markus; https://orcid.org/0000-0001-9643-9939, Blanco Ramírez, Sara; https://orcid.org/0000-0002-9638-6272, van Emmerik, Tim; https://orcid.org/0000-0002-4773-9107, Gallitelli, Luca; https://orcid.org/0000-0002-2188-4584, chiquito Gesualdo, Gabriela; https://orcid.org/0000-0001-6589-3397, Gonzalez Otero, Wendy, Hanus, Sarah; https://orcid.org/0000-0002-5232-6964, He, Zixiao; https://orcid.org/0000-0001-7576-8055, Hoffmeister, Svenja; https://orcid.org/0000-0002-4785-1836, Imhoff, Ruben O; https://orcid.org/0000-0002-4096-3528, Kerlin, Tim; https://orcid.org/0000-0002-0424-6193, Meshram, Sumit M, Meyer Oliveira, Aline; https://orcid.org/0000-0002-7076-4570, Scheller, Mirjam; https://orcid.org/0009-0005-3826-8007, and et al
- Abstract
This paper shares an early-career perspective on potential themes for the upcoming International Association of Hydrological Sciences (IAHS) scientific decade (SD). This opinion paper synthesizes six discussion sessions in western Europe identifying three themes that all offer a different perspective on the hydrological threats the world faces and could serve to direct the broader hydrological community: “Tipping points and thresholds in hydrology”, “Intensification of the water cycle”, and “Water services under pressure”. Additionally, four trends were distinguished concerning the way in which hydrological research is conducted: big data, bridging science and practice, open science, and inter- and multidisciplinarity. These themes and trends will provide valuable input for future discussions on the theme for the next IAHS SD. We encourage other Early-Career Scientists to voice their opinion by organizing their own discussion sessions and commenting on this paper to make this initiative grow from a regional initiative to a global movement.
- Published
- 2023
5. Shifting Waters: The Challenges of Transitioning from Freshwater to Treated Wastewater Irrigation in the Northern Jordan Valley
- Author
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Tawfik, Mohamed Hassan, primary, Al-Zawaidah, Hadeel, additional, Hoogesteger, Jaime, additional, Al-Zu’bi, Maha, additional, Hellegers, Petra, additional, Mateo-Sagasta, Javier, additional, and Elmahdi, Amgad, additional
- Published
- 2023
- Full Text
- View/download PDF
6. Where should hydrology go? An early-career perspective on the next IAHS Scientific Decade: 2023–2032
- Author
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van Hateren, Theresa C., primary, Jongen, Harro J., additional, Al-Zawaidah, Hadeel, additional, Beemster, Joris G.W., additional, Boekee, Judith, additional, Bogerd, Linda, additional, Gao, Sijia, additional, Kannen, Christin, additional, van Meerveld, Ilja, additional, de Lange, Sjoukje I., additional, Linke, Felicia, additional, Pinto, Rose B., additional, Remmers, Janneke O.E., additional, Ruijsch, Jessica, additional, Rusli, Steven R., additional, van de Vijsel, Roeland C., additional, Aerts, Jerom P.M., additional, Agoungbome, Sehouevi M.D., additional, Anys, Markus, additional, Blanco Ramírez, Sara, additional, van Emmerik, Tim, additional, Gallitelli, Luca, additional, Chiquito Gesualdo, Gabriela, additional, Gonzalez Otero, Wendy, additional, Hanus, Sarah, additional, He, Zixiao, additional, Hoffmeister, Svenja, additional, Imhoff, Ruben O., additional, Kerlin, Tim, additional, Meshram, Sumit M., additional, Meyer, Judith, additional, Meyer Oliveira, Aline, additional, Müller, Andreas C.T., additional, Nijzink, Remko, additional, Scheller, Mirjam, additional, Schreyers, Louise, additional, Sehgal, Dhruv, additional, Tasseron, Paolo F., additional, Teuling, Adriaan J., additional, Trevisson, Michele, additional, Waldschläger, Kryss, additional, Walraven, Bas, additional, Wannasin, Chanoknun, additional, Wienhöfer, Jan, additional, Zander, Mar J., additional, Zhang, Shulin, additional, Zhou, Jingwei, additional, Zomer, Judith Y., additional, and Zwartendijk, Bob W., additional
- Published
- 2023
- Full Text
- View/download PDF
7. Where should hydrology go? An early-career perspective on the next IAHS Scientific Decade: 2023-2032
- Author
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van Hateren, Theresa C, Jongen, Harro J, Al-Zawaidah, Hadeel, Beemster, Joris G W, Boekee, Judith, Bogerd, Linda, Gao, Sijia, Kannen, Christin, van Meerveld, H J, de Lange, Sjoukje I, Linke, Felicia, Pinto, Rose B, Remmers, Janneke O E, Ruijsch, Jessica, Rusli, Steven R, van de Vijsel, Roeland C, Aerts, Jerom P M, Agoungbome, Sehouevi M D, Anys, Markus, Blanco Ramírez, Sara, van Emmerik, Tim, Gallitelli, Luca, chiquito Gesualdo, Gabriela, Gonzalez Otero, Wendy, Hanus, Sarah, He, Zixiao, Hoffmeister, Svenja, Imhoff, Ruben O, Kerlin, Tim, Meshram, Sumit M, Meyer Oliveira, Aline, Scheller, Mirjam, et al, and University of Zurich
- Subjects
10122 Institute of Geography ,910 Geography & travel ,Water Science and Technology - Published
- 2023
- Full Text
- View/download PDF
8. Shifting Waters: The Challenges of Transitioning from Freshwater to Treated Wastewater Irrigation in the Northern Jordan Valley
- Author
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Mohamed Hassan Tawfik, Hadeel Al-Zawaidah, Jaime Hoogesteger, Maha Al-Zu’bi, Petra Hellegers, Javier Mateo-Sagasta, and Amgad Elmahdi
- Subjects
Northern Jordan Valley ,wastewater ,reuse ,water reallocation ,water user association ,water policy ,Middle East ,Jordan ,WIMEK ,Geography, Planning and Development ,Life Science ,WASS ,Aquatic Science ,Hydrology and Quantitative Water Management ,Biochemistry ,Water Resources Management ,Water Science and Technology ,Hydrologie en Kwantitatief Waterbeheer - Abstract
Jordan’s water scarcity prompted a national plan whereby treated wastewater is utilized to amend agricultural irrigation water so as to reallocate freshwater to urban/domestic uses. The policy, however, has engendered farmers’ resistance in the Northern Jordan Valley (NJV), causing a stalemate in putting new infrastructure into operation. This research investigated the socio-economic causes of farmer resistance and contestation, and examined the government’s institutional approach to overcome the challenges. We found that the perceived risks of wastewater reuse such as salinization and restrictions from international markets figure prominently in the farmers resistance. As yet, farmers have managed to avoid the shift to treated wastewater use by using the political agency of elite farmers who control the Water Users Associations. These same farmers have adopted informal water access practices to overcome freshwater shortages. At the same time, small producers who don’t have possibilities to access extra water and with less political clout seem more willing to irrigate with treated wastewater. We conclude that understanding the heterogeneous context in which the envisioned wastewater users operate is key to predicting and solving conflicts that arise in treated wastewater reuse projects.
- Published
- 2023
9. Where should hydrology go? An early-career perspective on the next IAHS Scientific Decade: 2023-2032
- Author
-
van Hateren, Theresa, primary, Jongen, Harro, additional, Al-Zawaidah, Hadeel, additional, Beemster, Joris, additional, Boekee, Judith, additional, Bogerd, Linda, additional, Gao, Sijia, additional, Kannen, Christin, additional, van Meerveld, Ilja, additional, de Lange, Sjoukje, additional, Linke, Felicia, additional, Pinto, Rose, additional, Remmers, Janneke, additional, Ruijsch, Jessica, additional, Rusli, Steven, additional, van de Vijsel, Roeland, additional, Aerts, Jerom, additional, Agoungbome, Sehouevi, additional, Anys, Markus, additional, Blanco Ramírez, Sara, additional, van Emmerik, Tim, additional, Gallitelli, Luca, additional, Gesualdo, Gabriela, additional, Gonzalez Otero, Wendy, additional, Hanus, Sarah, additional, He, Zixiao, additional, Hoffmeister, Svenja, additional, Imhoff, Ruben, additional, Kerlin, Tim, additional, Meshram, Sumit, additional, Meyer, Judith, additional, Meyer Oliveira, Aline, additional, Müller, Andreas, additional, Nijzink, Remko, additional, Scheller, Mirjam, additional, Schreyers, Louise, additional, Sehgal, Dhruv, additional, Tasseron, Paolo, additional, Teuling, Adriaan, additional, Trevisson, Michele, additional, Waldschläger, Kryss, additional, Walraven, Bas, additional, Wannasin, Chanoknun, additional, Wienhöfer, Jan, additional, Zander, Marjanne, additional, Zhang, Shulin, additional, Zhou, Jingwei, additional, Zomer, Judith, additional, and Zwartendijk, Bob, additional
- Published
- 2022
- Full Text
- View/download PDF
10. Microplastic dynamics within turbulence for improved modelling and monitoring strategies
- Author
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Bart Vermeulen, Kryss Waldschläger, and Hadeel Al-Zawaidah
- Abstract
Microplastics are an unavoidable part of riverine systems, altering the natural composition of rivers and the associated processes. Within a riverine system, microplastics can be present throughout the water column or within bedload, implying different transport, deposition, and erosion mechanisms. Some recent models have been developed to predict and understand the depth distribution concentration of microplastics and macroplastics, primarily relying on the Rouse model for sediments. However, the great variety in microplastics shape and size accompanied by the dynamic nature of riverine systems (e.g., variety of flow conditions, sediment composition and bedforms) question how realistic and reliable models for plastic distribution along the water column and within sediments are. Present models are often analogous to suspended sediment models and assume diffusivity to be equal to turbulent viscosity, they often exclude the bedload, neglect the effect of turbulence and bed morphology, and come short in explaining the behaviour of mixtures of microplastics and sediments. Understanding these aspects is crucial to improve present models and to aid mitigation efforts and to optimize collection systems and policy. This project targets employing both physical and numerical modelling techniques to further develop depth concentration models of microplastics. We aim to further examine and quantify the influence of turbulence on microplastics transport and concentration distribution by establishing preliminary estimates for the eddy viscosity and diffusivity of microplastics and further examine a wider range of mixtures of microplastics and sediments with different shapes and sizes.
- Published
- 2022
- Full Text
- View/download PDF
11. Microplastic dynamics within turbulence for improved modelling and monitoring strategies
- Author
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Al-Zawaidah, Hadeel, primary, Vermeulen, Bart, additional, and Waldschlager, Kryss, additional
- Published
- 2022
- Full Text
- View/download PDF
12. Opportunities and Challenges of a Cap-and-Trade System for Plastics.
- Author
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Al-Zawaidah H, Kammerer M, Mitrano DM, and Waldschläger K
- Abstract
Recently, the rapid increase in global plastics production has caused various ecological and economic issues, worsened by poor material and waste management. Among the market-based instruments that could help mitigate the environmental impacts of plastics throughout their life-cycle, we evaluate the advantages and limitations of incorporating a cap-and-trade (CAT) system into future policy mixes. Our aim is to inspire further investigation of CAT's feasibility rather than presenting it as the ultimate solution. Drawing from past CAT implementations in domains such as water resource management and carbon emissions, we outline three key policy design considerations: (1) material and target group identification, (2) cap establishment and permit allocation, and (3) development of a competitive market environment. We explore a three-tiered approach with global, national, and sectoral caps covering the plastic lifecycle from cradle to grave. While there are viable reasons to consider a plastics CAT, significant challenges persist, which may ultimately limit its implementation. In the context of ongoing UN Plastics Treaty negotiations or future policy developments, this evaluation of CAT can be beneficial for assessing when and how this tool can address the negative externalities of plastics.
- Published
- 2025
- Full Text
- View/download PDF
13. Mapping Microplastic Movement: A Phase Diagram to Predict Nonbuoyant Microplastic Modes of Transport at the Particle Scale.
- Author
-
Al-Zawaidah H, Kooi M, Hoitink T, Vermeulen B, and Waldschläger K
- Subjects
- Geologic Sediments chemistry, Models, Theoretical, Water Pollutants, Chemical, Environmental Monitoring methods, Particle Size, Microplastics
- Abstract
Microplastics pose numerous threats to aquatic environments, yet understanding their transport mechanisms remains limited. Drawing from natural sediment research provides valuable insights to address this knowledge gap. One key dimensionless number used to describe sediment transport is the transport stage, referring to the ratio between the flow shear velocity and the particle settling velocity. However, variations in physical properties, such as shape and density, raise concerns about the applicability of existing sediment transport theories to microplastics. To address this challenge, we employed a physical modeling approach, examining 24 different nonbuoyant microplastic particles in a turbulent open channel flow. Utilizing 3D particle tracking, a total of 720 trajectories were recorded and analyzed. Microplastic particles exhibited transport modes akin to natural sediments, including rolling/sliding, saltation, and suspension. The transport stage strongly correlated with these modes, as well as with the mean forward velocity and mean position in the water column. Notably, particle shape emerged as a critical factor influencing transport dynamics. Due to their lower settling velocity, fibers tended to stay closer to the water surface with lower forward velocities compared to spheres. Based on the laboratory results, a new phase diagram for microplastics is introduced analogous to an existing diagram for sediments.
- Published
- 2024
- Full Text
- View/download PDF
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