Environmental Science and Health Publications
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- ItemClimate change/variability and hydrological modelling studies in Zimbabwe: a review of progress and knowledge gaps(Springer Nature, 2021-04-12) Maviza, A.; Ahmed, F.This paper reviews developments in climate science and hydrological modelling studies in Zimbabwe over the past 29 years in an effort to expose knowledge gaps within this research domain. We initially give a global and regional overview and then follow a systematic thematic approach in reviewing specifically online published, peer-reviewed journal articles on climate change/variability and hydrological modelling in Zimbabwe. The state and progress towards advanced integrated climate and hydrological modelling research are assessed, tracking benchmarks in the research methodologies (tools and techniques) used therein including geographic information systems and remote sensing. We present descriptive summaries of key findings, highlighting the main study themes (categories) and general conclusions arising from these studies while examining their implications for future climate and hydrological modelling research in Zimbabwe. Challenges associated with climate and hydrological modelling research in Zimbabwe are also briefly discussed and the main knowledge gaps in terms of research scope and methodologies employed in the reviewed studies also exposed. We conclude by presenting plausible potential areas of focus in updating and advancing scientific knowledge to better understand the climate-land use-hydrology nexus in Zimbabwe. While this paper is primarily relevant for researchers, the general findings are also important for policy-makers since it exposes potential areas for policy intervention or agenda setting in as far as climate and hydrology science research is concerned so as to effectively address pertinent questions in this domain in Zimbabwe.
- ItemA feasibility study to assess Imbrasia belina (mopane worm) sensitisation and related respiratory health outcomes in a rural community in Gwanda district, Zimbabwe(Springer Nature, 2021-02-22) Ndlovu, V.; Chimbari, M.; Sibanda, E.; Ndarukwa, P.Background Allergic diseases are considered to be some of the fastest growing chronic conditions in Africa. Of concern is the paucity of knowledge about the local environment and its role in allergic disease development. In response to this, we explored whether Imbrasia belina, a popular indigenous edible insect commonly known as mopane worm, is a potential allergen of clinical and public health significance in Zimbabwe. This study was intended to assess the plausibility and feasibility of this hypothesis with a view to evaluate the insect’s health impact in a larger study. Methods The study participants included male and female villagers aged 10 years and above in Gwanda district, Zimbabwe. Eligible participants who completed the household questionnaire were referred to the local clinic for skin prick tests and to measure lung function and allergic airway inflammation. Allergen sensitisation patterns were evaluated using 10 different inhalant allergen extracts including an in-house preparation of mopane worm. Lung function was measured with a Koko Legend spirometer, and fractional exhaled nitric oxide levels (FeNO) (NIOX VERO) were measured in participants with at least one abnormal spirometric parameter. Data was analysed using Stata version 13 software. Results Of the 46 eligible participants that completed the household questionnaire, 17 went to the clinic giving a response rate of 37%. The majority who completed the questionnaire were adults (91%) and the children (9%) were all female. The prevalence of sensitisation to Imbrasia belina was 50%, and the prevalence ranged from 22 to 72% for the other allergens including cockroach, mosquito and house dust mites. The data collection tools were safe and well tolerated by participants with no adverse events reported. Self-reported respiratory symptoms, abnormal lung function and elevated FeNO were recorded amongst participants sensitised to mopane worm. Conclusion Pre-defined feasibility criteria were met with the exception of a lower than expected response rate for clinic data collection in this pilot study. For the main study, modifying the sampling strategy and applying more consistent community engagement will improve the response rates.
- ItemEvaluation of the Skill of Monthly Precipitation Forecasts from Global Prediction Systems over the Greater Horn of Africa(Weather and Forecasting, 2021-04-27) Endris, H.S.; Hirons, L.; Segele, Z.T.; Gudoshava, M.; Woolnough, S.; Artan, G.A.The skill of precipitation forecasts from global prediction systems has a strong regional and seasonal dependence. Quantifying the skill of models for different regions and time scales is important, not only to improve forecast skill, but to enhance the effective uptake of forecast information. The Subseasonal to Seasonal Prediction project (S2S) database contains near-real-time forecasts and reforecasts from 11 operational centers and provides a great opportunity to evaluate and compare the skill of operational S2S systems. This study evaluates the skill of these state-of-the-art global prediction systems in predicting monthly precipitation over the Greater Horn of Africa. This comprehensive evaluation was performed using deterministic and probabilistic forecast verification metrics. Results from the analysis showed that the prediction skill varies with months and region. Generally, the models show high prediction skill during the start of the rainfall season in March and lower prediction skill during the peak of the rainfall in April. ECCC, ECMWF, KMA, NCEP, and UKMO show better prediction skill over the region for most of the months compared with the rest of the models. Conversely, BoM, CMA, HMCR, and ISAC show poor prediction skill over the region. Overall, the ECMWF model performs best over the region among the 11 models analyzed. Importantly, this study serves as a baseline skill assessment with the findings helping to inform how a subset of models could be selected to construct an objectively consolidated multimodel ensemble of S2S forecast products for the Greater Horn of Africa region, as recommended by the World Meteorological Organization.
- ItemMultisector Collaborative Groundwater-Surface Water Modelling Approach to Improve Resilience to Hydrological Extremes in the Limpopo River Basin(Springer, 2021) Mustafa, S.M.T.; Van Loon, A.; Artur, L.; Bharucha, Z.; Chinyama, A.; Chirindja, F.; Day, R.; Franchi, F.; Geris, J.; Hussey, S.; Nesamvuni, E.It is necessary to combine the understanding of physical environmental drivers with social, economic, cultural and political perspectives and information to build resilience to future flood and drought hazards. We present a flexible collaborative modelling approach to improve resilience to hydrological extremes in large basins with application to the Limpopo River Basin (LRB). It uses an iterative, knowledge co-production process to strengthen crucial bridges between scientists and water management stakeholders on the appropriate scale(s). In the proposed collaborative modelling approach, the integrated hydro (geo)logical model is combined with regional to transboundary people’s knowledges and policies. We analyse the effect and importance of stakeholders’ feedback on the numerical model prediction. The proposed methodology is applied in the Limpopo River Basin (LRB) where floods and droughts are recurrent events. Through this iterative multisector collaborative modelling approach, we aim to develop a reliable and feasible management instrument to help reduce the impact of alternating droughts and floods and increase the resilience to hydrological extremes.
- ItemTraditional Practitioners and Nurses’ Perspectives on Traditional Medicine Utilisation During Antenatal Care in Matabeleland South Province, Zimbabwe(SAGE, 2021-07-01) Mudonhi, N.; Nunu, W.N.Background Traditional Health System has been reported to be the most accessible, affordable, and acceptable in resource-poor settings, particularly in Sub-Saharan Africa. It is utilised for different health needs, including pregnancy management. This study sought to explore traditional and Nurses’ perspectives on traditional medicine utilisation during antenatal care in Bulilima District, Plumtree, Zimbabwe. Methods A qualitative survey was conducted on purposively selected nurses’ and snowballed traditional health practitioners who responded to unstructured interviews. Data were collected using a digital tape recorder, transcribed, and thematically analysed on Max Qualitative Data Analysis. Results A total of 6 superordinate and 10 subordinate themes emerged from the collected and analysed data on both traditional practitioners and nurses. The superordinate themes associated with Traditional Medicine utilisation during pregnancy by women were: protective role, beliefs, shortening of labour, cleansing, accessibility, and collaboration between traditional practitioners and modern health practitioners. Nurses expressed their skepticism on the safety and efficacy of traditional medicine utilisation during pregnancy. Conclusion Women utilise traditional medicines and remedies during pregnancy for different reasons, such as protection from evil spirits, foetus growth and shortening labour. There are concerns regarding their safety from the health service providers, although traditional practitioners share a different view. There is a need for investing in research that would ascertain the safety of these traditional medicines as this system has been a cheaper alternative for those who cannot afford or access modern health services.