Evaluating the accuracy of gridded water resources reanalysis and evapotranspiration products for assessing water security in poorly gauged basins DOI Creative Commons
Elias Nkiaka, Robert G. Bryant, Joshua Ntajal

et al.

Hydrology and earth system sciences, Journal Year: 2022, Volume and Issue: 26(22), P. 5899 - 5916

Published: Nov. 25, 2022

Abstract. Achieving water security in poorly gauged basins is critically hindered by a lack of situ river discharge data to assess past, current, and future evolution resources. To overcome this challenge, there has been shift toward the use freely available satellite reanalysis products. However, due inherent bias uncertainty, these secondary sources require careful evaluation ascertain their performance before being applied basins. The objectives study were evaluate evapotranspiration estimates from eight gridded resources (WRR), six satellite-based (ET) products, ET derived complimentary relationship (CR–ET) across located Central–West Africa. Results highlight strengths weaknesses different WRR simulating dynamics Likewise, products also show some strength monthly ET. Our results further revealed that models strongly influenced model structure, input data, spatial resolution. Considering all hydrological criteria, FLDAS-Noah, Lisflood, AWRAL, Terra among best performing while for estimates, Terra, GLEAM3.5a 3.5b, PMLV2 outperformed rest Given plethora available, it imperative representative identify can be each region. choice particular product will depend on application user requirements. Taking together, suggest are useful source assessing

Language: Английский

Evaluation of the Coupled Coordination of the Water–Energy–Food–Ecology System Based on the Sustainable Development Goals in the Upper Han River of China DOI Creative Commons
Nan Fu, Dengfeng Liu, Liu Hui

et al.

Agronomy, Journal Year: 2024, Volume and Issue: 14(4), P. 706 - 706

Published: March 28, 2024

Water, energy, food, and ecology are essential for achieving sustainable development in a region, order to achieve the Sustainable Development Goals, their security is also at river basin scale. This study investigated interrelationships among water system, food energy ecosystem China’s Upper Han River, alignment with Goals 2, 6, 7, 15 of United Nations’ (SDGs). To evaluate achievement SDGs this water–energy–food–ecology system was evaluated by thorough evaluation index according 15, weights indices were given using combination CRITIC weighting method entropy approach. The level coupling coordination from 2000 2021 quantitatively degree model. autoregressive integrated moving average model built forecast process 2022 2041, predicted processes improved 0.396 0.845, comprehensive assessment increased 113% 2021, demonstrating that it stable period general. fragile support capacity had great impact on overall index. SDG2 (food system), SDG6 (water SDG7 (energy SDG15 (ecosystem) all have higher levels internal conflict. These bi-directional dynamics tended converge sufficiency mode future as well historical period. analysis relationship showed there inherent connections interactions between four goals, presented high persisted SDG2, SDG6, SDG7, SDG15. In promoting these tends be coordinated 2041. results offer view basin’s management.

Language: Английский

Citations

4
Remote sensing crop water productivity and water use for sustainable agriculture during extreme weather events in South Africa DOI Creative Commons
Kudzai Shaun Mpakairi, Timothy Dube, Mbulisi Sibanda

et al.

International Journal of Applied Earth Observation and Geoinformation, Journal Year: 2024, Volume and Issue: 129, P. 103833 - 103833

Published: April 16, 2024

The impact of climate variability and extreme weather events on agricultural productivity in arid environments has become a focal point contemporary research. Monitoring crop water (CWP) is critical urgently required especially the regions where agriculture consumes an above-average portion available fresh resources. In this context, study aimed to demonstrate utility remotely sensed data assessing CWP use dynamics across diverse types South Africa during El Niño (2018/19) non-El (2021/22) events. addressing objective, also assessed intra- inter-annual variations for including, grains, grapes, citrus fruits, teas, planted pastures, oil seeds. used potential evapotranspiration biomass derived from Moderate Resolution Imaging Spectroradiometer (MODIS) satellite estimate 2017 2021. This period included years. results showed that (PET) MODIS was related PET estimated stations (R2 > 0.6; RMSE < 21.90; p-value 0.001). terms use, pastures had highest 114 mm/month), while teas fruits lowest (6 mm/month). Citrus grapes consistently annual mean (<0.02 kg/m3/annually), seeds (>0.1 kg/m3/annually). Lastly, there were no significant differences (p-value 0.05) between all crops observed periods, suggesting effectiveness adaptation measures interventions period. These provide simple, spatially explicit framework, relevant understanding crop-water laying groundwork informed decision-making sustainable practices. Integrating these findings into policy frameworks strategies paramount ensuring food security resilience changing climate.

Language: Английский

Citations

4
Water Management: Insights from Two Distinct Sub-Saharan Africa DOI Creative Commons
Awol Kedir Jewaro, M. Yunus Pamukoğlu, Martina Zeleňáková

et al.

Selected scientific papers, Journal Year: 2025, Volume and Issue: 20(1), P. 1 - 26

Published: March 15, 2025

Abstract Water management seeks the optimal solutions to challenges posed by society’s demand for food security, energy production, socioeconomic advancement, and sound ecosystems. In 21st century, complexities of natural disasters human-induced factors impede ability address water security issues. Sub-Saharan Africa is at a critical juncture where it must implement substantial reforms in planning its systems enhance sustainability resources. Yet, region faces numerous water-related issues due complex human such as urbanization population growth, particularly countries like Ethiopia Mauritania. This paper delves into availability, sustainability, management, governance these two regions Horn (Ethiopia) Western (Mauritania). It also highlights practices involved planning, managing, utilizing services areas. Therefore, this provides foundation further research development sustainable resources region.

Language: Английский

Citations

0
A quantitative understanding of the state and determinants of water-energy-food security in Africa DOI
Elias Nkiaka, Robert G. Bryant, Simon Manda

et al.

Environmental Science & Policy, Journal Year: 2022, Volume and Issue: 140, P. 250 - 260

Published: Dec. 28, 2022

Language: Английский

Citations

17
Sustainable Development Goal 6 Assessment and Attribution Analysis of Underdeveloped Small Regions Using Integrated Multisource Data DOI Creative Commons

Junxia Miao,

Xiaoyu Song, Fanglei Zhong

et al.

Remote Sensing, Journal Year: 2023, Volume and Issue: 15(15), P. 3885 - 3885

Published: Aug. 5, 2023

Data scarcity is a key factor impacting the current emphasis on individual indicators and distribution of large-scale spatial objects in country-level SDG 6 research. An investigation progress assessments factors influencing implementation cities counties indicates that smaller-scale regions hold greater operational significance for achieving 2030 Agenda Sustainable Development from bottom up; thus, urgent attention should be given to data deficiencies inadequate analyses related impact attribution. This study, conducted National Innovative Demonstration Zone Lincang City, investigates multisource sources such as integrated statistics, survey data, remote sensing analyze status achievement 2015–2020, employs LMDI decomposition model identify influential factors. The assessment results demonstrate composite index increased 0.47 0.61 between 2015 2020. have significant heterogeneity. water resources indexes wealthy countries are high, environment ecology developing comparatively high undeveloped counties. Technological economic advances main positive drivers index, relative contributions technology, economy, structure, population 61.84%, 54.16%, −4.03%, −11.96%, respectively. study shows can compensate lack small-scale regional statistical when quantitative comprehensive multi-indicator evaluations SDGs conducted. And, policies 6.1.1, 6.2.1, 6.3.1 priority with limited funding.

Language: Английский

Citations

10
Delineation of groundwater potential zone using geospatial tools and analytical hierarchy process (AHP) in the state of Uttarakhand, India DOI
Atar Singh,

Rajesh Kumar,

Ramesh Kumar

et al.

Advances in Space Research, Journal Year: 2023, Volume and Issue: 73(6), P. 2939 - 2954

Published: Dec. 23, 2023

Language: Английский

Citations

10
SDG 6 progress analyses in sub-Saharan Africa from 2015–2020: the need for urgent action DOI Creative Commons
Megersa Olumana Dinka, Joan Nyika

Discover Water, Journal Year: 2024, Volume and Issue: 4(1)

Published: June 24, 2024

Abstract This study used data from various international databases to track the progress of SDG 6 target indicators in sub-Saharan Africa (SSA) region between 2015 and 2020. Findings showed that although minimal positive was realized evaluation period, more than half SSA residents had no access safe drinking water services, improved sanitation facilities, hygiene services wastewater treatment. The computed profile index conformed with trend as goal’s realization rated medium–low. further compounded by limited data, preferential urban rich poor monitoring progress. analysis also noted despite these challenges putting concerted efforts promote transboundary cooperation management 6% stressed resources. recommended on need revamp collection enable decision-making planning actions, use technology treat reuse well device new sources water, enhanced participation communities projects efficiency steer towards region.

Language: Английский

Citations

3
A systematic review on the causes and effects of urbanization on wetlands in Sub-Saharan Africa DOI Creative Commons

Aliata I. Mumuni,

Henry Mensah, Solomon Asamoah

et al.

Urbanization, sustainability and society., Journal Year: 2025, Volume and Issue: 2(1), P. 153 - 177

Published: March 5, 2025

Purpose Urbanization in Sub-Saharan Africa (SSA) has seen rapid growth recent decades, resulting significant changes to the region’s landscape and ecosystems, including wetlands. This study aims examine causes effects of urbanization on lays down need intervene protect restore wetlands SSA. Design/methodology/approach The methodology used was a systematic literature review, supported by VOSviewer software preferred reporting items for reviews criteria, with data analyzed using abductive reasoning content analysis. Findings found that complex web factors reflecting regional global trends propels Africa. is driven population growth, economic development, infrastructure development migration, leading ecosystems. key include biodiversity loss, flooding altered hydrology, water quality degradation loss livelihood. identifies sprawling urbanization, densification, informal settlement, fragmented planned urban expansion as patterns affecting Practical implications offers practical recommendations policymakers, planners local communities ensure long-term sustainability while conserving wetland ecosystems Thus, there continued cooperation, technology discovery sharing, cooperative research funding initiatives community. It also commends implementing green infrastructure, like artificial wetlands, mitigate adverse environmental promote sustainable development. Originality/value visualization uncover structural frontiers, focusing conservation context areas SSA, where adds degradation.

Language: Английский

Citations

0
Prevalence of Anopheles stephensi in Horn of Africa: a systematic review and meta-analysis DOI Creative Commons

Wagaw Abebe,

Assefa Sisay, Yenesew Mihret

et al.

BMC Infectious Diseases, Journal Year: 2025, Volume and Issue: 25(1)

Published: April 27, 2025

Anopheles stephensi has been a primary cause of malaria spread in urban areas. The World Health Organization announced threat alert 2019 that highlighted the An. outbreak Horn Africa. Currently, there is insufficient information on prevalence stephensi. Therefore, this systematic review and meta-analysis aimed to determine pooled Systematic search was performed retrieve articles from PubMed, Scopus, Science Direct databases, Google Scholar engine. Fourteen potential studies provided important data were systematically reviewed analyzed. extracted separately into Microsoft Excel analyzed using STATA 17.0. Inverse variance done evaluate heterogeneity across studies. A funnel plot an Egger's test used publication bias. trim-and-fill-meta-analysis carried out generate bias-adjusted effect estimate. random model Subgroup analysis based year country. total 14 included for meta-analysis. From meta-analysis, 41.26%. subgroup showed conducted 2014-2018 99%, while it 36.82% 2019-2024. On other hand, country-based Djibouti, Eritrea, Ethiopia, Kenya, Somaliland, Sudan 10.5%, 17.3%, 55.30%, 9.90%, 48.70%, 24.63%, respectively. This reveal high Africa region. underscores significant challenges managing infections transmitted by officials must adjust current vector control measures incorporate with local species. Also, regular identification limiting be sustained ensure effectiveness prevention.

Language: Английский

Citations

0
Mycofiltration of Aqueous Iron (III) and Imidacloprid Solutions, and the Effects of the Filtrates on Selected Biomarkers of the Freshwater Snail Helisoma duryi DOI Creative Commons
Sanele Michelle Mnkandla,

Mafereka Francis Tyson Mosoabisane,

Norah Basopo

et al.

Archives of Environmental Contamination and Toxicology, Journal Year: 2024, Volume and Issue: 86(2), P. 187 - 197

Published: Feb. 1, 2024

Abstract To alleviate the burden of water contamination, a newly developed form bioremediation known as mycofiltration can be employed. Mycofiltration is an environment-friendly technology involving treatment contaminated by passing it through network saprophytic fungal mycelium. A mycofilter made Pleurotus ostreatus was used for removal iron (III) and imidacloprid from aqueous solutions. Batch mycofiltration, at dosage 1 g per 50 mL, performed on solutions different concentrations (0.99, 10.7, 22.9, 27.72 mg/L) pH (3.3, 7 11). For column packed into pyrex columns (3.3 × 15 cm) to desired bed heights. Iron 18.99 mg/L 234.70 ng/L, respectively, were filtered constant flow rate. Thereafter, Helisoma duryi snails exposed 96 h respective filtrates, their catalase acetylcholinesterase activities assessed. showed rates high 85%. Column 94 31% imidacloprid, respectively. Catalase activity significantly reduced ( p < 0.05) in or compared non-mycofiltered media. higher induced filtrates comparison with media 0.05). There no significant differences > mycofiltered Mycofilter characterisation using Fourier Transform Infrared Spectrophotometry revealed changes transmittance intensity mycofilters vs ones found improve quality although removed more effectively than imidacloprid.

Language: Английский

Citations

3