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  1. Article ; Online: Preliminary assessment of near-shorewave energy potential in the Mozambique Channel

    Alberto Filimão Sitoe / A. M. Hoguane / Soufiane Haddout

    Journal of Water and Climate Change, Vol 14, Iss 1, Pp 330-

    2023  Volume 349

    Abstract: ... The results indicate that the waves are highly variable (≥80%), with high (1.5–2 m on average), longer (8–20 s ... followed by the northern part of the channel (1.2–1.4 m, 6–8 s, 6–7 kW m−1, on average), with the middle ... part displaying a lower energy (6 kW m−1, on average) wave climate. Peaks of high waves (up to 5 m) and ...

    Abstract This paper presents the results of a study of ocean wave energy in the Mozambique Channel, an open channel located in the Western Indian Ocean and oriented north-southwards. Weekly data of significant wave height and wave period, obtained from marine-analyst, on the web, were analysed in 10 selected coastal sites, 5 on each side of the channel. The channel receives swell waves from the extratropical South Indian Ocean in the south and monsoon-generated swell from the north, modified by trade winds and cyclones. The results indicate that the waves are highly variable (≥80%), with high (1.5–2 m on average), longer (8–20 s, on average), and more energetic (10–23 kW m−1, on average) waves found in the southern part of the channel, followed by the northern part of the channel (1.2–1.4 m, 6–8 s, 6–7 kW m−1, on average), with the middle part displaying a lower energy (6 kW m−1, on average) wave climate. Peaks of high waves (up to 5 m) and high-energy waves (up to 90 kW m−1), attributed to storm conditions, were observed throughout the study period. Despite high variability in wave characteristics, the probability of waves exceeding the threshold values for viable exploitation for electricity production was about 61 and 63% for the western and eastern sides of the channel, respectively. HIGHLIGHTS Ocean wave energy in the Mozambique Channel, an open channel located in the Western Indian Ocean and oriented north-southwards is studied.; A recommended location for the deployment of energy extraction devices for electricity production.;
    Keywords desalination ; irrigation ; open channel ; swell ; wave energy applications ; wave variability ; Environmental technology. Sanitary engineering ; TD1-1066 ; Environmental sciences ; GE1-350
    Subject code 551
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher IWA Publishing
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Ecological impact due to extraction of energy from estuaries

    Haddout, S. / Priya, K.L. / Hoguane, A.M.

    International Journal of River Basin Management. 2023 Jan. 02, v. 21, no. 1 p.139-140

    2023  

    Abstract: It is for the reader in the worldwide: following the recent research papers in the International Journal of River Basin Management by Haddout and Priya (2020) and Haddout et al. (2020), estuaries renewable energy, salinity gradient energy (SGE) as ... ...

    Abstract It is for the reader in the worldwide: following the recent research papers in the International Journal of River Basin Management by Haddout and Priya (2020) and Haddout et al. (2020), estuaries renewable energy, salinity gradient energy (SGE) as example, can be gained from the controlled mixing of two solutions with different salt concentrations, taking advantage of the chemical potential difference. This energy promises to assist in the effort to reduce carbon emissions worldwide. But we have not ignored that the estuaries are among the most biologically productive ecosystems on the planet critical to the life cycles of fish, other aquatic animals and the creatures which feed on them. Recently the wider estuarine community asks if this energy could have significant effects on the fisheries and marine life caused by the diverted flow. In this comment, we focus on the degree of the impact of estuary energy on ecology; and finally we hope that this comment has not given a too idiosyncratic or personal view.
    Keywords administrative management ; carbon ; ecology ; energy ; environmental impact ; estuaries ; fish ; renewable energy sources ; salinity ; watersheds
    Language English
    Dates of publication 2023-0102
    Size p. 139-140.
    Publishing place Taylor & Francis
    Document type Article ; Online
    ZDB-ID 2568945-9
    ISSN 1814-2060 ; 1571-5124
    ISSN (online) 1814-2060
    ISSN 1571-5124
    DOI 10.1080/15715124.2020.1870994
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Effect of preventive measures in the containment of SARS-CoV-2 epidemic: a comparative study.

    Hoguane, A M / Priya, K L / Haddout, S / Ljubenkov, I

    Health care for women international

    2021  Volume 42, Issue 3, Page(s) 288–303

    Abstract: From the time when the first cases of COVID-19 were reported in Wuhan City, China, in December 2019, strict regulations are being implemented by policy makers to contain the spread of the virus. The measures taken in different countries spanned from ... ...

    Abstract From the time when the first cases of COVID-19 were reported in Wuhan City, China, in December 2019, strict regulations are being implemented by policy makers to contain the spread of the virus. The measures taken in different countries spanned from complete isolation and lockdown to different degrees of restrictions to people's movement, contact between people, hygiene and sanitation. Accordingly, the success in containing the virus also differed. Italy was one among the worst-affected countries in the world despite the lockdown measures adopted. A combination of lockdown and Level-3 State of Emergency measures were adopted in Portugal and South Africa, which helped to delay and flatten the epidemic curve. The timely application of Level-3 State of Emergency in Mozambique resulted in recording low infection rates. Above all the tripod, orderly movement of people, social distance and hygiene and sanitation is the keystone measure to prevent spread of the virus. However, for successful outcome, the measures have to be tailored to the local context.
    MeSH term(s) COVID-19/epidemiology ; COVID-19/prevention & control ; Communicable Disease Control/methods ; Humans ; Italy/epidemiology ; Mozambique/epidemiology ; Portugal/epidemiology ; SARS-CoV-2 ; South Africa/epidemiology
    Language English
    Publishing date 2021-02-11
    Publishing country England
    Document type Comparative Study ; Journal Article
    ZDB-ID 632677-8
    ISSN 1096-4665 ; 0739-9332
    ISSN (online) 1096-4665
    ISSN 0739-9332
    DOI 10.1080/07399332.2021.1876066
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 2847: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  5. Article ; Online: Water Scarcity

    Haddout, S. / Priya, K.L. / Hoguane, A.M. / Ljubenkov, I.

    Science & Technology Libraries

    A Big Challenge to Slums in Africa to Fight against COVID-19

    2020  Volume 39, Issue 3, Page(s) 281–288

    Keywords Library and Information Sciences ; covid19
    Language English
    Publisher Informa UK Limited
    Publishing country uk
    Document type Article ; Online
    ISSN 0194-262X
    DOI 10.1080/0194262x.2020.1765227
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: SARS-CoV-2 epidemic

    Ljubenkov, Ignor / Haddout, Soufiane / Priya, K. L. / Hoguane, A. M.

    Toxicological & Environmental Chemistry

    changes in air quality during the lockdown in Zagreb (Republic of Croatia)

    2020  Volume 102, Issue 5-6, Page(s) 302–303

    Keywords Pollution ; Health, Toxicology and Mutagenesis ; Environmental Chemistry ; covid19
    Language English
    Publisher Informa UK Limited
    Publishing country uk
    Document type Article ; Online
    ZDB-ID 770230-9
    ISSN 0092-9867 ; 0277-2248
    ISSN 0092-9867 ; 0277-2248
    DOI 10.1080/02772248.2020.1778703
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 3535: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  7. Article: Water Scarcity: A Big Challenge to Slums in Africa to Fight against COVID-19

    Haddout, S. / Priya, K. L. / Hoguane, A. M. / Ljubenkov, I.

    Sci Technol Libr

    Abstract: In the light of the current situation regarding the COVID-19 disease, a discussion is attempted on the need for focusing on water scarcity in Africa and the important considerations to conserving water to fight against SARS-CoV-2 virus. ...

    Abstract In the light of the current situation regarding the COVID-19 disease, a discussion is attempted on the need for focusing on water scarcity in Africa and the important considerations to conserving water to fight against SARS-CoV-2 virus.
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #378313
    Database COVID19

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  8. Article: Producing electricity at estuaries from salinity gradient: exergy analysis

    Haddout, S. / Priya, K. L. / Rhazi, M. / Jamali, A. / Aghfir, M. / Hoguane, A. M. / Ljubenkov, I.

    International journal of river basin management. 2022 July 03, v. 20, no. 3

    2022  

    Abstract: Salinity gradient technologies generate electricity from the chemical pressure differential created by differences in ionic concentration between freshwater and seawater. Seawater has a higher osmotic pressure than freshwater due to its high ... ...

    Abstract Salinity gradient technologies generate electricity from the chemical pressure differential created by differences in ionic concentration between freshwater and seawater. Seawater has a higher osmotic pressure than freshwater due to its high concentration of salt. Two main technology types, Reverse Electro-Dialysis (RED) and Pressure-Retarded Osmosis (PRO), make use of semi-permeable membranes which generate an osmotic potential that can be used to generate electricity using turbines in deltas, estuaries, fjords or hyper-saline lakes. In PRO, semi-permeable membranes placed between the two streams of solutions allow the transport of water from low pressure diluted solution to high-pressure concentrated solution. RED requires two alternating semi-permeable membranes that allow the diffusion of the ions but not the flow of H₂O. An exergy analysis of an SGE system of estuary-river can be applied to calculate the maximum potential power for electricity generation. Seawater is taken as reference environment for calculating the exergy of water since the seawater is the final reservoir. In this work, an aqueous sodium chloride solution (NaCl) model is used of the selected estuary (i.e. Sebou estuary (Morocco)) to calculate the thermodynamic properties of seawater in the estuary. This model does not consider seawater as an ideal model and provides accurate thermodynamics properties of sodium chloride solution. The chemical exergy analysis considers sodium chloride (NaCl) as main salt in the water of Sebou estuary. The sodium chloride concentration (SCC) is more than, ∼0.3 mol/L in the estuary. The flow exergy and the power potential calculations of the investigated system ranged from ∼3.5 to ∼8.6 kJ/kg and ∼65 to ∼1303 MW respectively, thereby exposing the opportunity for power generation in Sebou estuary.
    Keywords administrative management ; electricity ; electricity generation ; electrodialysis ; estuaries ; exergy ; freshwater ; models ; osmosis ; osmotic pressure ; power generation ; salinity ; seawater ; sodium chloride ; watersheds ; Morocco
    Language English
    Dates of publication 2022-0703
    Size p. 301-309.
    Publishing place Taylor & Francis
    Document type Article
    ZDB-ID 2568945-9
    ISSN 1814-2060 ; 1571-5124
    ISSN (online) 1814-2060
    ISSN 1571-5124
    DOI 10.1080/15715124.2020.1830784
    Database NAL-Catalogue (AGRICOLA)

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  9. Article: Secchi Disk Measurements in Turbid Water

    Bowers, D. G. / Roberts, E. M. / Hoguane, A. M. / Fall, K. A. / Massey, G. M. / Friedrichs, C. T.

    Journal of geophysical research. 2020 May, v. 125, no. 5

    2020  

    Abstract: In the classical theory of the Secchi disk depth, diffuse sunlight falling on the disk is reflected back to the observer's eye along the most direct route, as a beam. The disappearance depth, ZSD, of the disk is then expected to vary inversely with the ... ...

    Abstract In the classical theory of the Secchi disk depth, diffuse sunlight falling on the disk is reflected back to the observer's eye along the most direct route, as a beam. The disappearance depth, ZSD, of the disk is then expected to vary inversely with the sum of the beam and diffuse attenuation coefficients: c + KD. Observations presented here show that, in the most turbid waters sampled, the Secchi disk is visible at greater depths (by a factor of up to 4) than predicted by this theory. In these conditions, the disk appears blurry, and it seems likely that some of the light reflected by the disk returns to the eye as diffuse light, photons being scattered one or more times on their journey from the disk surface to the observer. We have modified the theory of the Secchi disk in turbid water to allow for a mixture of beamed and diffuse light contributing to disk visibility. The modified theory corrects the under‐estimate of Secchi depths in turbid waters and gives good agreement with observations over a wide range of turbidity. The insight gained allows a more informed interpretation of Secchi disk measurements in turbid water.
    Keywords eyes ; geophysics ; research ; solar radiation ; turbidity
    Language English
    Dates of publication 2020-05
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 161667-5
    ISSN 2169-9291 ; 2169-9275 ; 0148-0227 ; 0196-2256
    ISSN (online) 2169-9291
    ISSN 2169-9275 ; 0148-0227 ; 0196-2256
    DOI 10.1029/2020JC016172
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 2004/712: Show issues
    Z 2004/710: Show issues

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  10. Article ; Online: Observations of strong ocean current events offshore Pemba, Northern Mozambique

    Ullgren, Jenny E. / André, Emídio / Gammelsrød, Tor / Hoguane, António M.

    2016  

    Abstract: ... drifters passing the mooring. Velocities up to 60 cm/s were observed at 850 m depth. Altimetry-derived ...

    Abstract Three years (2008–2011) of current measurements outside Pemba (∼13°S), Mozambique, are presented. Oil and gas reserves are found in the region, and knowledge of the ocean current climate is important for safe offshore operations. The full-depth current profile at Pemba was estimated by comparing with moorings further south. The moored record was also compared with geostrophic velocities obtained from sea surface height (SSH) fields, current profiles from ship-mounted Acoustic Doppler Current Profiler and surface currents from seven drifters passing the mooring. Velocities up to 60 cm/s were observed at 850 m depth. Altimetry-derived currents, while strong (often > 100 cm/s), are probably underestimates due to coarse resolution. Direct observations show surface currents up to 170 cm/s. Four strong current events were studied in detail. Three of the four events appeared to be associated with anticyclonic eddies nearby. The time series of SSH-derived geostrophic current always showed southward velocities, never below 20 cm/s. These findings indicate that currents off Pemba may display characteristics of a western boundary current rather than being completely dominated by eddies. Strong current events are probably caused by anticyclones interacting with the boundary current and speeds on the order of 200 cm/s can be expected.
    Subject code 551
    Language English
    Publisher IMarEST
    Publishing country de
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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