Results 51 to 60 of about 367 (179)

Effects of Reduced Precipitation and Water Level Variability on Phytoplankton Dynamics and Thermal Structure in a Large Tropical Reservoir

Water Resources Research, Volume 62, Issue 10, October 2026.
Abstract Drought is one of the most severe and complex natural hazards causing changes in water balance and impeding crucial water‐dependent ecosystem services. Over the last 25 years, multiple severe droughts linked to El Niño events have affected the Zambian and Zimbabwean regions.
Anna Joelle Greife, Elisa Calamita, Monica Pinardi, Laura Carrea, Ross I. Maidment, Jaime Pitarch, Mzime Regina Ndebele‐Murisa, Claudia Giardino, Mariano Bresciani, Francesco Pietro Fava, Clément Albergel, Marina Amadori   +11 more
wiley   +1 more source

River flow response to changing electricity demand and centralized hydropower operations in the Paranapanema River basin, Brazil

Journal of Hydrology: Regional Studies
Study region: The Paranapanema River Basin, located in southeastern Brazil, is characterized by a cascade of large hydropower plants regulated by a nationally coordinated dispatch system.
Thais Fujita, Luz Adriana Cuartas, Juliana Andrade Campos, Peder Hjorth, Caluan Rodrigues Capozzoli, Edmilson Dias de Freitas, Cintia Bertacchi Uvo   +6 more
doaj   +1 more source

Hydro power plants operating modes in a cascade system depending on the needs of the power system

Energija, Ekonomija, Ekologija, 2020
The paper presents the methodology for hydro power plants operation (Long-term and Short-term) in a hydro power cascade system. It includes water managing of generating and/or pumping units taking into accounts technical characteristics of the power ...
Sofija Nikolova Poceva, Anton Chaushevski, Valentino Stojkovski, Zoran Markov   +3 more
doaj   +1 more source

Sex‐Specific Atlantic Salmon Upstream Passage and Fallback at a Natural Cascade After Dam Removal

Fisheries Management and Ecology, Volume 33, Issue 5, Page 963-976, October 2026.
ABSTRACT In the Boquet River (NY, USA) a low‐head dam set above a ~200‐m bedrock cascade was removed in 2015. We used radio‐telemetry to assess landlocked Atlantic salmon passage at the remaining cascade (2020, 2022). Across years, 52% of males (13/25) attempted cascade passage whereas females made no discernable attempts (0/11).
Kurt C. Heim, Jonah L. Withers, William R. Ardren, Laurie A. Earley, David Minkoff, Theodore Castro‐Santos   +5 more
wiley   +1 more source

Impact of regulated water level fluctuations on the sexual reproduction of remnant Myricaria laxiflora populations

Global Ecology and Conservation, 2019
The construction and operation of the Three Gorges-Gezhou cascade water conservancy and hydropower projects has dramatically changed downstream water level fluctuations.
Fangqing Chen, Shoupeng Guan, Yanran Ma, Zongqiang Xie, Kun Lv, Yongwen Huang, Guomei Jia   +6 more
doaj   +1 more source

Green Hydrogen in Brazilian Media: Dominant Narratives and Missing Dimensions of the Energy Trilemma

Politics &Policy, Volume 54, Issue 5, October 2026.
ABSTRACT Media discourses help shape the visibility and legitimacy of energy transition pathways in the public sphere. This study examines how Brazilian mainstream newspapers framed green hydrogen and assesses the alignment of these narratives with the energy trilemma: energy security, environmental sustainability, and social accessibility. We analyzed
Flávia Mendes de Almeida Collaço, Felipe Moura Oliveira, Thiago Costa Holanda, Lira Luz Benites Lazaro   +3 more
wiley   +1 more source

Escalating Uncertainty Under Increasing Risk in Compound Heat and Precipitation Extremes

Geophysical Research Letters, Volume 53, Issue 17, 16 September 2026.
Abstract Projection uncertainty fundamentally constrains climate adaptation, yet its evolution in compound heat and precipitation extremes (CHPE) remains poorly understood. Here we quantify CHPE uncertainty using 14 CMIP6 models and two single‐model initial‐condition large ensembles.
Zhiling Zhou, Liping Zhang, Jijun Xu, Jun Xia   +3 more
wiley   +1 more source

Spatio‐Temporal Assessment of Fish Biodiversity in High‐Density Cascade Dam Rivers Using Environmental DNA Metabarcoding

Biological Diversity, Volume 3, Issue 3, Page 158-168, September 2026.
This study employed eDNA technology for biodiversity surveys and conducted high‐density spatiotemporal eDNA sampling to evaluate ecosystem‐scale patterns across temporal, spatial, and habitat dimensions. We identified 97 fish species from 12 orders, 29 families, and 71 genera using eDNA technology. Spatially, fish diversity indices were correlated with
Changping Jiang, Yanping Zhang, Changwei Jiang, Zijun Su, Tai Wang, Yanyan Du   +5 more
wiley   +1 more source

Study on Multi-Objective Optimal Operation Model for Hydro and Thermal Electric Plants with Energy-Saving and Emission-Reduction Generation

工程科学与技术, 2009
:ABSTRACT：During carrying on the energy-saving and emission-reduction policy, actively studying the mode of energy generation scheduling optimization has been widespread concern on the power department. Hydraulic coupling between hydropower plants, time
Zhang Zhi-gang, 马光文
doaj  

Joint Scheduling and Coordinating Operation of a Mega Hydropower System Based on Gaussian Radial Basis Functions and the Borg Algorithm in the Upper Yangtze River, China

Energies
A large number of reservoirs (or hydropower plants) have been constructed for flood control and energy production in the past several decades in the Yangtze River basin in China.
Shenglian Guo, Chenglong Li, Bokai Sun, Xiaoya Wang, Peng Li, Le Guo   +5 more
doaj   +1 more source