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524 results for “Dams”
Fig. 2 in Blockage of migration routes by dam construction: can migratory fish find alternative routes?
Fig. 2. Mean (±SE) of release-recapture time lag (a), distance traveled (b) and speed developed (c) by individual curimba Prochilodus lineatus in the Upper Paraná River region, tagged and released downstream (Down) and upstream (Up) from the Porto Primavera Dam. Location indicates, respectively, the "release point – recapture point" in relation to the Porto Primavera Dam.
Fig. 6 in Environmental factors related to entry into and ascent of fish in the experimental ladder located close to Itaipu Dam
Fig. 6. Temporal variability (a) and correlogram of total abundance (b) of small-sized fish recorded in the experimental fish ladder (Pool A = 10 m, Pool B = 27 m) located near Itaipu Dam.
Fig. 3 in Environmental factors related to entry into and ascent of fish in the experimental ladder located close to Itaipu Dam
Fig. 3. Monthly variations in abundance of the main middle- and large-sized species in the experimental fish ladder (Pool A = 10 m, Pool B = 27 m) located near Itaipu Dam.
Fig. 2 in Environmental factors related to entry into and ascent of fish in the experimental ladder located close to Itaipu Dam
Fig. 2. Abundance of the main middle- and large-sized species of fish captured in the samples taken in the experimental fish ladder located near Itaipu Dam. The first three letters of each species (found in text) are shown.
Fig. 5 in Utilization of the fish ladder at the Engenheiro Sergio Motta Dam, Brazil, by long distance migrating potamodromous species
Fig. 5. Percentage of individuals of migratory species in the pools sampled in the ladder located at Engenheiro Sergio Motta Dam.
Fig. 1 in Environmental factors related to entry into and ascent of fish in the experimental ladder located close to Itaipu Dam
Fig. 1. Variation in temperature, river level, spillway discharge (SD) and turbine discharge (TD) at the experimental ladder located near Itaipu Dam, during the sampling period (a) and correlogram of the variables (b).
Fig. 5 in Environmental factors related to entry into and ascent of fish in the experimental ladder located close to Itaipu Dam
Fig. 5. Correlograms of the residuals of the autoregressive models applied (VV: spillway discharge; VT: turbine discharge) to the data collected in the experimental ladder located near Itaipu Dam.
Fig. 1 in Utilization of the fish ladder at the Engenheiro Sergio Motta Dam, Brazil, by long distance migrating potamodromous species
Fig. 1. Location of the Engenheiro Sergio Motta (Porto Primavera) Hydroelectric power plant in the Paraná River, Brazil.
Fig. 4 in Utilization of the fish ladder at the Engenheiro Sergio Motta Dam, Brazil, by long distance migrating potamodromous species
Fig. 4. Monthly averages of the total number of individuals (± standard error) (a) and of migratory species (b), captured at intervals of 8h in the different pools sampled in the fish ladder located at Engenheiro Sergio Motta Dam (N: total number of individuals).
Fig. 1 in Blockage of migration routes by dam construction: can migratory fish find alternative routes?
Fig. 1. Map of the study area, which includes the stretch of the Paraná River between the Jupiá and Itaipu reservoirs. Numbers between parentheses are the numbers of individuals of curimba (Prochilodus lineatus) recaptured in each place (details given in Results).
Fig. 3 in Fish ladder of Lajeado Dam: migrations on one-way routes?
Fig. 3. Mean values of water transparency (Secchi disc, m) upstream from (248 and 173 km) and within Lajeado Reservoir, from October, 2003 through September, 2004.
Fig. 1 in Fish ladder of Lajeado Dam: migrations on one-way routes?
Fig. 1. Sampling sites in the Tocantins River and Lajeado Reservoir (detail: area close to the dam and the fish ladder).
Fig. 4 in Preliminary study on the application of radio-telemetry techniques to evaluate movements of fish in the Lateral canal at Itaipu Dam, Brazil
Fig. 4. Movements of Prochilodus lineatus (fish no 1 and 4) and Pseudoplatystoma fasciatum (fish no 9, 10 and 13) in the lateral channel located near Itaipu Dam (detections in the fixed stations, in number of hours post-release, are shown in the white circles).
Fig. 3 in Preliminary study on the application of radio-telemetry techniques to evaluate movements of fish in the Lateral canal at Itaipu Dam, Brazil
Fig. 3. Radio-telemetry fixed station at "Lago das Grevilhas", in the lateral channel near Itaipu Dam.
Fig. 1 in Preliminary study on the application of radio-telemetry techniques to evaluate movements of fish in the Lateral canal at Itaipu Dam, Brazil
Fig. 1. Locations of the fixed-station receivers (numbers inside the white circles) during the pilot study conducted in the lateral channel located near Itaipu Dam.
Fig. 2 in Preliminary study on the application of radio-telemetry techniques to evaluate movements of fish in the Lateral canal at Itaipu Dam, Brazil
Fig. 2. Surgical implantation of a radiotransmitter in Pseudoplatystoma fasciatum, captured in the lateral channel located near Itaipu Dam.
Fig. 4 in Fish ladder of Lajeado Dam: migrations on one-way routes?
Fig. 4. Proportions of the different orders of fish in the larval samples taken near the Lajeado Dam, before (bold font) and after (regular font) dam closure and above the reservoir after its formation.
Fig. 2 in Fish ladder of Lajeado Dam: migrations on one-way routes?
Fig. 2. Spatial variations in the density (± standard deviation - SD) of planktonic fish eggs and larvae in the Middle Tocantins River, before (October, 1999 – September, 2001 - a) and after (October, 2002 – September, 2004 - b) the formation of Lajeado Reservoir (UHE Luís Eduardo Magalhães).
Imaging the Breaking of Electrostatic Dams in Graphene for Ballistic and Viscous Fluids
<p>These datasets can be used to reproduce the experimental and theoretical results in the manuscript "Imaging the Breaking of Electrostatic Dams in Graphene for Ballistic and Viscous Fluids," and corresponding supplementary material. </p> <p>"STP-measurement1" and "STP-measurement2" contain the raw scanning tunneling potentiometry (STP) data used to generate Figures 1-4 in the main text and Figures S2-5 in the supplement. Each ".dat" file contains the tunneling I-V curve used to solve for the electrochemical potential at a single pixel in each STP dataset. </p> <p>"Estimation of c_G.nb" contains the raw Mathematica code to generate Figure 5 in the main text and Figures S7-8 in the supplement.</p> <p>"device-resistance_gate-sweep_T=4.5K.txt" and "device-resistance_gate-sweep_T=77K.txt" can be used to reproduce Figure S1 in the supplement. </p> <p> </p>
Global Dam Tracker: A database of more than 35,000 dams with location, catchment, and attribute information
<p><strong>Citation</strong></p> <p>Zhang, Alice Tianbo, and Vincent Xinyi Gu. 2023. “Global Dam Tracker: A Database of More than 35,000 Dams with Location, Catchment, and Attribute Information.” <em>Scientific Data</em> 10 (1): 111.</p> <p><a href="https://www.nature.com/articles/s41597-023-02008-2">https://www.nature.com/articles/s41597-023-02008-2</a></p> <p> </p> <p><strong>Description</strong></p> <p>We present one of the most comprehensive geo-referenced global dam databases to date. The Global Dam Tracker (GDAT) contains 35,000 dams with cross-validated geo-coordinates, satellite-derived catchment areas, and detailed attribute information. Combining GDAT with fine-scaled satellite data spanning three decades, we demonstrate how GDAT improves upon existing databases to enable the inter-temporal analysis of the costs and benefits of dam construction on a global scale. Our findings show that over the past three decades, dams have contributed to a dramatic increase in global surface water coverage, especially in developing countries in Asia and South America. This is an important step toward a more systematic understanding of the worldwide impact of dams on local communities. By filling in the data gap, GDAT would help inform a more sustainable and equitable approach to energy access and economic development.</p>
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International Brain Laboratory public data
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OpenNeuro
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