Ashenafi Seifu Gragne
PhD
Position:
Researcher Scientist, PhD
Phone:
+47 467 83 762
Section:
Urbane miljøer og infrastruktur
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Scientific articles and Bookchapters
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Hernes, Ragni Rønneberg; Gragne, Ashenafi Seifu; Hassan Abdalla, Elhadi Mohsen; Braskerud, Bent C.; Alfredsen, Knut; Muthanna, Tone Merete; (2020) Assessing the effects of four SUDS scenarios on combined sewer overflows in Oslo, Norway: evaluating the low-impact development module of the mike urban model. Hydrology Research ISSN 1998-9563. Vol 51 No6 s1437-1454 doi: 10.2166/nh.2020.070
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Johannessen, Birgitte Gisvold; Hamouz, Vladimir; Gragne, Ashenafi Seifu; Muthanna, Tone Merete; (2019) The transferability of SWMM model parameters between green roofs with similar build-up. Journal of Hydrology ISSN 0022-1694. Vol 569 s816-828 doi: 10.1016/j.jhydrol.2019.01.004
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Russwurm, Ingrid L.; Johannessen, Birgitte Gisvold; Gragne, Ashenafi Seifu; Lohne, Jardar; Muthanna, Tone Merete; (2018) Modelling green roof detention performance in cold climates. EPiC Series in Engineering ISSN 2516-2330. Vol 3 s1804-1813 doi: 10.29007/4rp8
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Gragne, Ashenafi Seifu; Alfredsen, Knut; Sharma, A; Mehrotra, R; (2015) Recursively updating the error forecasting scheme of a complementary modelling framework for improved reservoir inflow forecasts. Journal of Hydrology ISSN 0022-1694. Vol 527 s967-977 doi: 10.1016/j.jhydrol.2015.05.039
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Gragne, Ashenafi Seifu; Sharma, Ashish; Mehrotra, R; Alfredsen, Knut; (2015) Improving real-time inflow forecasting into hydropower reservoirs through a complementary modelling framework. Hydrology and Earth System Sciences (HESS) ISSN 1027-5606. Vol 19 No8 s3695-3714 doi: 10.5194/hess-19-3695-2015
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Gragne, Ashenafi Seifu; Sharma, Ashish; Mehrotra, R; Alfredsen, Knut; (2014) Improving inflow forecasting into hydropower reservoirs through a complementary modelling framework. Hydrology and Earth System Sciences Discussions (HESSD) ISSN 1812-2116. Vol 11 No10 s12063-12101 doi: 10.5194/hessd-11-12063-2014
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Uhlenbrook, Stefan; Mohammed, Yasir; Gragne, Ashenafi Seifu; (2010) Analyzing catchment behavior through catchment modeling in the Gilgel Abay, Upper Blue Nile River Basin, Ethiopia. Hydrology and Earth System Sciences Discussions (HESSD) ISSN 1812-2116. Vol 14 s2153-2165 doi: 10.5194/hess-14-2153-2010
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Gragne, Ashenafi Seifu; Uhlenbrook, Stefan; Mohammed, Yasir; Kebede, Seifu; (2008) Catchment Modeling and Model Transferability in Upper Blue Nile Basin, Lake Tana, Ethiopia. Hydrology and Earth System Sciences Discussions (HESSD) ISSN 1812-2116. Vol 5 s811-842 doi: 10.5194/hessd-5-811-2008
NIVA began to register scientific articles in CRIStin in 2010, reports from 2014.
Reports
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Meland, Sondre; Barkved, Line Johanne; Gragne, Ashenafi Seifu; Seifert-Dähnn, Isabel; Brandt, Uta; Enge, Caroline; Johnsen, Geir Sogge; Johannesen, Hans-Petter; Kronvall, Kjersti Wike; (2021) Demonstrasjons- og testsenter for karakterisering og rensing av forurenset overvann - mulighetsstudie , Norsk institutt for vannforskning. ISBN 978-82-577-7346-5. No 7610 (49 sider)
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Gragne, Ashenafi Seifu; Ranneklev, Sissel Brit; (2021) Diffus avrenning fra Boliden AS til Sørfjorden og vannovervåkning i Eitrheimsvågen , Norsk institutt for vannforskning. ISBN 978-82-577-7388-5. No 7652 (23 sider)
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Gragne, Ashenafi Seifu; Muthanna, Tone Merete; (2017) Capacity of the Kværnerbyen Culvert-Tunnel System: Assessment and suggestions for increased flow capacity , NTNU. ISBN 978-82-7598-106-4. (22 sider)
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Muthanna, Tone Merete; Gragne, Ashenafi Seifu; Mittet, Jonas; (2017) A regionalisation technique for urban ungauged catchments. A case study from Norway , Norwegian University of Science and Technology, Department of Civil and Environmental Engineering. (45 sider)
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Gragne, Ashenafi Seifu; Sægrov, Sveinung; (2016) Beregning av nedbørsavrenning i Stangelandsåna, Sandnes , Norwegian University of Science and Technology NTNU. ISBN 978-82-7598-099-9. (30 sider)
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Gragne, Ashenafi Seifu; Muthanna, Tone Merete; Alfredsen, Knut; Sægrov, Sveinung; (2015) The Kværnerbyen flood of 2nd September 2015 Reconstruction of the Alna River flows and capacity assessment of the culvert-tunnel system , ntnu. ISBN 978-82-7598-093-7. (19 sider)
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Gragne, Ashenafi Seifu; Alfredsen, Knut; (2015) Updating Hydrologic Models for Improved Inflow Forecasts into Hydropower Reservoirs , Norwegian University of Science and Technology. ISBN 978-82-326-0774-7. (163 sider)
NIVA began to register scientific articles in CRIStin in 2010, reports from 2014.
Other
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Bruland, Oddbjørn; Kolberg, Sjur; Engeland, Kolbjørn; Tøfte, Lena S; Gragne, Ashenafi Seifu; Alfredsen, Knut; Liston, Glen; (2012) Updating of states in operational hydrological models , European Geosciences Union General Assembly 23.04.2012
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Bruland, Oddbjørn; Kolberg, Sjur; Engeland, Kolbjørn; Tøfte, Lena S; Gragne, Ashenafi Seifu; Liston, Glen; Sand, Knut; Alfredsen, Knut; (2012) Updating of states in operational hydrological models , Geophysical Research Abstracts
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Gragne, Ashenafi Seifu; Alfredsen, Knut; Engeland, Kolbjørn; Kolberg, Sjur; (2011) Evaluation of updating procedures for improving simulation of autumn flows , Northern Research Basins 15.08.2011
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Gragne, Ashenafi Seifu; Alfredsen, Knut; (2011) Automated Detection and Categorization of Hydrograph Errors for Updating Operational Hydrologic Models , XXV IUGG General Assembly 28.06.2011
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Abdella, Yisak Sultan; Alfredsen, Knut; Tsegaw, Aynalem Tassachew; Gragne, Ashenafi Seifu; (2010) Distributed modelling of catchment hydrology using radar derived precipitation , Conference on modelling hydrology, climate and land surface processes 14.09.2010
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Gragne, Ashenafi Seifu; Uhlenbrook, Stefan; (2008) Analysis of Model Sensitivity for Ease of Manual Rainfall-Runoff Model Calibration in Upper Blue Nile Basin, Ethiopia , 3rd International Conference on Engineering Education, Technology and Environment 18.04.2008
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Gragne, Ashenafi Seifu; Uhlenbrook, Stefan; Mohammed, Yasir; (2007) Catchment Modeling and Preliminary Application of Isotopes for Model Validation , 1st IMWI/ITC/UNESCO-IHE Workshop 04.06.2007
NIVA began to register scientific articles in CRIStin in 2010, reports from 2014.