Výsledky vyhledávání - "Dagnachew Legesse"

Akademický článek

Mapping of ferric (Fe3+) and ferrous (Fe2+) iron oxides distribution using ASTER and Landsat 8 OLI data, in Negash Lateritic iron deposit, Northern Ethiopia

Autor: Haylemikeal Hans Abay, Dagnachew Legesse, Karuturi Venkata Suryabhagavan, Balemwal Atnafu

Publikováno v: Geology, Ecology, and Landscapes, Vol 8, Iss 3, Pp 223-240 (2024)

Iron plays an important role in industrial and engineering fields development of a country and as such there is an enormous demand for iron in Ethiopia. However, a search for this valuable primary mineral resource exploration remains challenging and

Externí odkaz: https://doaj.org/article/5664ca61bfa140149b3ed493bd466bf6

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Akademický článek

Identifying Land Use/Cover Dynamics in the Koga Catchment, Ethiopia, from Multi-Scale Data, and Implications for Environmental Change

Autor: Günter Blöschl, Dagnachew Legesse, Michael Exner-Kittridge, Wolfgang Wagner, Eleni Yeshaneh

Publikováno v: ISPRS International Journal of Geo-Information, Vol 2, Iss 2, Pp 302-323 (2013)

This study analyzed more than 50 years of land cover and land use changes in the 260 km2 Koga catchment in North Western Ethiopia. The data used includes 1:50,000 scale aerial photographs, Landsat MSS, TM and ETM images, and ASTER images together wit

Externí odkaz: https://doaj.org/article/fea28c9bcdf34a7ba5be3b412e4185b8

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A laboratory information management system for the analysis of tritium ( 3 H) in environmental waters

Autor: Stefan Terzer-Wassmuth, Leonard I. Wassenaar, Dagnachew Legesse Belachew, Pradeep K. Aggarwal, Philipp Martin Klaus, Luis Araguas, Lorenzo Copia

Publikováno v: Applied Radiation and Isotopes. 137:139-146

Accurate and precise measurements of low levels of tritium (3H) in environmental waters are difficult to attain due to complex steps of sample preparation, electrolytic enrichment, liquid scintillation decay counting, and extensive data processing. W

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::67848093f8ee19a02ccaaad13d08fe63
https://doi.org/10.1016/j.apradiso.2018.03.001

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Measurement of extremely 2 H-enriched water samples by laser spectrometry: application to batch electrolytic concentration of environmental tritium samples

Autor: Dagnachew Legesse Belachew, B. Kumar, Leonard I. Wassenaar, Pradeep K. Aggarwal, Cedric Douence

Publikováno v: Rapid Communications in Mass Spectrometry. 30:415-422

RATIONALE Natural water samples artificially or experimentally enriched in deuterium ((2) H) at concentrations up to 10,000 ppm are required for various medical, environmental and hydrological tracer applications, but are difficult to measure using c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1befabce053e5f442e035df42a9eb1e5
https://doi.org/10.1002/rcm.7459

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A laboratory information management system for the analysis of tritium (

Autor: Dagnachew Legesse, Belachew, Stefan, Terzer-Wassmuth, Leonard I, Wassenaar, Philipp M, Klaus, Lorenzo, Copia, Luis J Araguás, Araguás, Pradeep, Aggarwal

Publikováno v: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine. 137

Accurate and precise measurements of low levels of tritium (

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::89a6bd2de7463d4cb24ec61996a38855
https://pubmed.ncbi.nlm.nih.gov/29625346

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Akademický článek

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Proportions of Convective and Stratiform Precipitation Revealed in Water Isotope Ratios

Autor: Ulrike Romatschke, Pradeep K. Aggarwal, Courtney Schumacher, Luis Araguas-Araguas, Peter Berg, Dagnachew Legesse Belachew, Fred J. Longstaffe, Aaron Funk

Publikováno v: Earth Sciences Publications

Tropical and midlatitude precipitation is fundamentally of two types, spatially-limited and high-intensity convective or widespread and lower-intensity stratiform, owing to differences in vertical air motions and microphysical processes governing rai

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b987d98e663148118267148994bc970
https://ir.lib.uwo.ca/earthpub/13

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Fluoride enrichment mechanism and geospatial distribution in the volcanic aquifers of the Middle Awash basin, Northern Main Ethiopian Rift

Autor: Moumtaz Razack, Tamiru Abiye, Wakgari Furi, Tenalem Ayenew, Dagnachew Legesse

Publikováno v: Journal of African Earth Sciences. 60:315-327

Considering the anomalous concentration of fluoride in the ground waters of the Middle Awash basin, a comprehensive survey of the enrichment mechanism as well as its association with common hydrochemical variables was conducted using multivariate sta

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8ba76639d4c6b3f2c3d060480537b5fd
https://doi.org/10.1016/j.jafrearsci.2011.03.004

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The hydrogeology of Adama-Wonji basin and assessment of groundwater level changes in Wonji wetland, Main Ethiopian Rift: results from 2D tomography and electrical sounding methods

Autor: Tigistu Haile, Wakgari Furi, Tamiru Abiye, Dagnachew Legesse, Moumtaz Razack

Publikováno v: Environmental Earth Sciences. 62:1323-1335

Rise of groundwater level becomes an emerging concern at Wonji irrigation field, Main Ethiopian Rift. An integrated study based on geophysical resistivity methods is conducted at Wonji wetland to understand the link between irrigation water and the s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f20036125cfcc676dba89bc5a52f387b
https://doi.org/10.1007/s12665-010-0619-y

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