Seasonal and Annual Rainfall Variability and Their Impact on Rural Water Supply Services in the Wami River Basin, Tanzania
Twisa, Sekela and Buchroithner, Manfred F., (2019). Seasonal and Annual Rainfall Variability and Their Impact on Rural Water Supply Services in the Wami River Basin, Tanzania. Water, 11(10), 1-18
Document type:
Article
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Sub-type Journal article Author Twisa, Sekela
Buchroithner, Manfred F.Title Seasonal and Annual Rainfall Variability and Their Impact on Rural Water Supply Services in the Wami River Basin, Tanzania Appearing in Water Volume 11 Issue No. 10 Publication Date 2019-10-01 Place of Publication Basel, Switzerland Publisher MDPI Start page 1 End page 18 Language eng Abstract In some parts of Africa, rainfall variability has resulted in widespread droughts and floods, thus posing a substantial challenge to water availability in rural areas, especially drinking water. Therefore, due to increasing water demands, increases in the population, and economic development, water supply systems are under constant stress. One of the critical uncertainties surrounding the effects of rainfall variability in Africa is the significant impact that it imposes on rural water supply services. The present study analyzes the trends in annual and seasonal rainfall time series in the Wami River Basin to see if there have been any significant changes in the patterns during the period 1983–2017 and how they affect the access to water supply services in rural areas. The study analyzes the trends of rainfall series of three stations using simple regression, Mann–Kendal Test and Sen’s Slope Estimator. The water point mapping datasets were analyzed considering seasonal variation. The analysis showed a statistically significant positive trend in annual rainfall at Kongwa and March–April–May (MAM) seasonal rainfall at Dakawa. The maximum increase in annual rainfall occurred at Kongwa (5.3 mm year−1) and for MAM seasonal data at Dakawa (4.1 mm year−1). Water points were found to be significantly affected by seasonal changes, both in terms of availability and quality of water. There also exists a strong relationship between rural water services and seasons. UNBIS Thesaurus RURAL WATER SUPPLY Keyword Wami River Basin
Water points
Water point mapping
Time-series dataCopyright Holder The Authors Copyright Year 2019 Copyright type Creative commons DOI 10.3390/w11102055 -
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