Results 71 to 80 of about 19,955 (232)

Practice and prospects for intelligent construction and smart operation of Lancang River Hydropower Projects

Journal of Intelligent Construction
A hydropower project has four significant stages: artificialization, mechanization, automation, and digitization. Currently, it is in the intelligent stage and is advancing toward smartization.
Hongqi Ma, Haibin Xiao
doaj   +1 more source

Two new endemic species of Portulaca (Portulacaceae) from the Brazilian Pampa grasslands

Nordic Journal of Botany, EarlyView.
Portulaca L. is a monophyletic, cosmopolitan genus of succulent plants comprising ca 153 species, with particularly high diversity in xerophytic ecosystems in tropical and subtropical regions. Based on morphological evidence, we describe and illustrate two new species from the Brazilian Pampa, Portulaca guaritensis and Portulaca guenoa.
José Roberto Ferraz, Bárbara Pinheiro Moreira, João Marcelo Alvarenga Braga, Leonardo Paz Deble   +3 more
wiley   +1 more source

Forging environmentalism: The influence of childhood nature experiences on people's pro‐biodiversity value orientations and attitudes

People and Nature, EarlyView.
Abstract With the rapid expansion of transnational biodiversity policy instruments promoting large‐scale landscape transformations that depend on public support for their success and feasibility, understanding the mechanisms underlying pro‐biodiversity attitudes has become important.
Oriol Garcia‐Antúnez, Christopher M. Raymond, Thomas Beery, Anton Stahl Olafsson   +3 more
wiley   +1 more source

Research on the diagnosis of leakage hazards in a karst reservoir based on integrated electrical method and geological method

Frontiers in Earth Science
ObjectiveDue to the dual influence of karst features in the dam site area and the unique characteristics of the dam soil, leakage issues in the dam body and dam foundation of a certain reservoir have persisted, limiting the effectiveness of the reservoir.
Jihua Yao, Jihua Yao, Yuanli Yang, Yuanli Yang, Mingwei Yang, Mingwei Yang, Zhigao Shen, Zhigao Shen, Xiangjian He, Xiangjian He, Xiang Chen, Xiang Chen   +11 more
doaj   +1 more source

Repeated Pleistocene Permafrost Episodes in the Western Pannonian Basin

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Concerning the study of past periglacial processes, the Pannonian Basin is a key area as it contains the southernmost frost polygons found in Central Europe. The presence or absence of permafrost is still, however, a matter of debate, and data on the timing of frost action are also scarce.
Krisztina Sebe, Ágnes Novothny, Gergely Surányi, Barbara Varga, László Fodor, Gábor Csillag   +5 more
wiley   +1 more source

PCR‐based species identification tools for wireworms (Coleoptera: Elateridae) of economic importance in Canada

Pest Management Science, EarlyView.
Species‐specific PCR primers and PCR‐based assays were designed for the identification of 15 economically important and difficult to distinguish wireworm pests in Canada. PCR specificity testing and performance assessments confirm the accuracy of the assays.
Kathleen Furtado, Willem G van Herk, Simran Kaur Cheema, Carol E Ritland, Richard C Hamelin, Michelle T Franklin   +5 more
wiley   +1 more source

Restoring Lateral Connectivity to Anthropogenic Riverscapes: Six Lessons From Stage Zero

River Research and Applications, EarlyView.
ABSTRACT Centuries of river modification, particularly straightening and incision, have severely reduced lateral connectivity between rivers and their floodplains. As a result, Stage 0 riverscapes, characterised by high lateral connectivity (e.g., anastomosing or wetland riverscapes), are now rare in anthropogenic landscapes.
Richard J. Mason, Matthew F. Johnson, Ben Eardley, Matthew J. Hemsworth, Arnaud Foret, Luca Mao, Matt Parr, Alan Puttock, Richard E. Brazier   +8 more
wiley   +1 more source

Research on seismic damage patterns and seismic performance of high asphalt core rockfill dams under strong earthquakes

Shuili Shuiyun Gongcheng Xuebao
High asphalt core rockfill dams are one of the main types of earth-rock dams, yet studies on their failure modes under strong earthquakes remain limited.
PU Shutao, ZENG Shuyuan, QIN Yuyang, WEI Kuangmin, GU Xingwen   +4 more
doaj   +1 more source

Forensic Hydraulic Analysis of Floodplain Connectivity Driven by Historical Beaver Dams in Colorado Headwater Streams

River Research and Applications, EarlyView.
ABSTRACT As ecosystem engineers, beavers (Castor canadensis) modify river corridor form through dam building. When beavers are removed from a river corridor, their unmaintained dams wash out, altering the stream's hydrologic regime. The assumption that beaver dams increase floodplain connectivity is frequently presumed but has not been directly ...
Kayla Schultz, Ryan R. Morrison, Sara Rathburn, Connor Mertz, Nicholas Christensen   +4 more
wiley   +1 more source

Integrated high-resolution electrical tomography and drilling cascading investigation of earth-rock dam leakage in a siltstone region: A case study of the Maoshan Reservoir, China

Abstract Piping, erosion at the contact of flowing soil, and leaching damage pose a serious leakage risk to earth-rock dams in the siltstone regions. With increasing reservoir operation time, seepage phenomena commonly occur in earth-rock dams, leading to progressively severe damage to the dam body.
Yanwen Xin, Jianjun Gan, Fangzhou Liu, Zhihang Si, kaijun liu, tao tian   +5 more
openaire   +1 more source