Results 81 to 90 of about 1,235 (243)

Unsteady seepage analysis of super-high core wall dams using 3D finite element method

Yantu gongcheng xuebao, 2018
The processes of reservoir impoundment and emptying have important impact on seepage safety of earth-rock dams. The seepage control is one of the key technical problems for 300 m-level super-high core wall dams.
LU Bin 1, XIE Xing-hua 1, WU Shi-qiang 1, WU Wei-xing 2, DA Ming-chang 3, GONG Yan 1
doaj   +1 more source

A Multi‐Method Approach to Assessing Barrier Effectiveness in Preventing the Spread of Invasive Signal Crayfish (Pacifastacus leniusculus)

River Research and Applications, EarlyView.
ABSTRACT Relieving barriers and increasing free flowing rivers is a global imperative to restore habitat connectivity for migratory fish stocks. While reducing river fragmentation will certainly improve biodiversity, the spread of non‐native species throughout a river system may be facilitated as an inadvertent outcome.
Matthew Harwood, Andrew W. Bray, Karis A. Woolfenden, Paul D. Stebbing, Alison M. Dunn, Josie South   +5 more
wiley   +1 more source

Analysis of Dam Characteristics and Failure Trend of Landslide Dams With Different Materials: Field Investigation

Water Resources Research
Landslides can block rivers and create natural dams that pose significant flooding hazards to upstream and downstream. Variations in dam materials and geometries play a critical role in controlling breach initiation and failure processes, thereby ...
Xiao Li, Huayong Chen, Tao Wang, Lu Zeng, Jiangang Chen, Zulong Zhu, Hechun Ruan, Huimin Sun   +7 more
doaj   +1 more source

Study on flow characteristics and design optimization of particle size threshold in coarse-grained soil using erosion function apparatus

Shuili Shuiyun Gongcheng Xuebao
In recent years, extreme weather events and geological disasters have frequently triggered overtopping failures of landslide dams and earth-rock dams.
WANG Yanlong, XIN Junlong, ZHANG Pengtao, XUE Jianghan, CHEN Chen, CHEN Jiankang   +5 more
doaj   +1 more source

The influence of embankment top load and water level change on the stability of soil embankment slope [PDF]

E3S Web of Conferences
Earthen embankments and earth and rock dams along rivers are often used to double as highways, which makes the embankments subject to the effects of seepage of water as well as top loading of the embankment.
Jiang Minmin, Xiao Xulian
doaj   +1 more source

Application of a Presumptive Standards Approach to Evaluate Environmental Flows in a Highly Regulated River Basin

River Research and Applications, EarlyView.
ABSTRACT The presumptive standards approach to environmental flows offers a method to develop interim guidelines for ecological and social‐cultural flow needs. The approach is based on deriving acceptable percent‐of‐flow limits based on naturalised flows (the absence of depletion or alteration of flow), and it can be an effective precursor to a full ...
Jennifer Lento, Wendy A. Monk, Fuad Yassin, Mustakim Ali, Hayley Carlson, Saman Razavi, Timothy D. Jardine   +6 more
wiley   +1 more source

Study on Deformation Characteristics of Gate Dam and Earth–Rock Dam Systems with Deep Overburden

Gate dam and earth–rock dam systems have many advantages, such as minimal ecological impact and good terrain adaptability, making them the preferred dam type for low-head, high-flow river areas with thick overburden layers. This study, based on an ongoing construction project, pioneers a comprehensive three-dimensional stress–deformation characteristic
Boyuan Liu, Feng Wang, Degao Zou, Yue Zhuo, Shaoyun Pang   +4 more
openaire   +1 more source

The Role of Sediment Supply on Fish Habitat Dynamics of a Morphologically Active River Widening

River Research and Applications, EarlyView.
ABSTRACT Restoration measures, such as river widening, aim to reactivate key morphodynamic processes, which are critical drivers of fluvial habitat dynamics. While some evidence supports the important role of sediment supply on river widening's morphology, its link to fish habitat availability and dynamics remains unclear.
Mahmoud O. M. Awadallah, Francesco Caponi, David F. Vetsch, Robert M. Boes, Davide Vanzo   +4 more
wiley   +1 more source

Study on Deformation Characteristics of Gate Dam and Earth-Rock Dam System on Deep Overburden

The gate dam and earth-rock dam system offers advantages such as minimal ecological impact and strong terrain adaptability, making them the preferred dam type for low-head, high-flow river areas with thick overburden layers. This study, based on a ongoing construction project, pioneered a comprehensive three-dimensional stress-deformation ...
Boyuan Liu, Feng Wang, Degao Zou, Yue Zhuo, Shaoyun Pang   +4 more
openaire   +1 more source

Retrospective image analysis for long‐term demography using Google Earth imagery

Remote Sensing in Ecology and Conservation, EarlyView.
We demonstrate that high‐resolution Google Earth imagery, combined with minimal field validation, enables retrospective tracking of individual invasive plants. The image shows one of the monitored individuals of Opuntia sp. in Greece. Our approach reveals long‐term demographic patterns, recruitment dynamics, and spatial expansion without continuous ...
Erola Fenollosa, Garrett Cohen, Roberto Salguero‐Gómez   +2 more
wiley   +1 more source