Historical Rainfall and Evapotranspiration Changes over Mpologoma Catchment in Uganda
Changes in the long-term (1948–2016) rainfall and evapotranspiration over Mpologoma catchment were analysed using gridded (0.25° × 0.25°) Princeton Global Forcing data. Trend and variability were assessed using a nonparametric approach based on the cumulative sum of the difference between exceedance...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2020/8870935 |
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| author | Ambrose Mubialiwo Charles Onyutha Adane Abebe |
| author_facet | Ambrose Mubialiwo Charles Onyutha Adane Abebe |
| author_sort | Ambrose Mubialiwo |
| collection | DOAJ |
| description | Changes in the long-term (1948–2016) rainfall and evapotranspiration over Mpologoma catchment were analysed using gridded (0.25° × 0.25°) Princeton Global Forcing data. Trend and variability were assessed using a nonparametric approach based on the cumulative sum of the difference between exceedance and nonexceedance counts of data. Annual and March-May (MAM) rainfall displayed a positive trend (p<0.05), whereas October-December (OND) and June-September rainfall exhibited negative trends with p>0.05 and p<0.05, respectively. Positive subtrends in rainfall occurred in the 1950s and from the mid-2000s till 2016; however, negative subtrends existed between 1960 till around 2005. Seasonal evapotranspiration exhibited a positive trend (p>0.05). For the entire period (1948–2016), there was no negative subtrend in the OND and MAM evapotranspiration. Rainfall and evapotranspiration trends and oscillatory variation in subtrends over multidecadal time scales indicate the need for careful planning of predictive adaptation to the impacts of climate variability on environmental applications which depend on water balance in the Mpologoma catchment. It is recommended that future studies quantify possible contributions of human factors on the variability of rainfall and evapotranspiration. Furthermore, climate change impacts on rainfall and evapotranspiration across the study area should be investigated. |
| format | Article |
| id | doaj-art-2b5436418b9941dbaea149cfd45be2b0 |
| institution | OA Journals |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-2b5436418b9941dbaea149cfd45be2b02025-08-20T02:04:33ZengWileyAdvances in Meteorology1687-93091687-93172020-01-01202010.1155/2020/88709358870935Historical Rainfall and Evapotranspiration Changes over Mpologoma Catchment in UgandaAmbrose Mubialiwo0Charles Onyutha1Adane Abebe2Africa Center of Excellence for Water Management, Addis Ababa University, P.O. Box 1176, Addis Ababa, EthiopiaDepartment of Civil and Building Engineering, Kyambogo University, P.O. Box 1, Kyambogo, Kampala, UgandaAfrica Center of Excellence for Water Management, Addis Ababa University, P.O. Box 1176, Addis Ababa, EthiopiaChanges in the long-term (1948–2016) rainfall and evapotranspiration over Mpologoma catchment were analysed using gridded (0.25° × 0.25°) Princeton Global Forcing data. Trend and variability were assessed using a nonparametric approach based on the cumulative sum of the difference between exceedance and nonexceedance counts of data. Annual and March-May (MAM) rainfall displayed a positive trend (p<0.05), whereas October-December (OND) and June-September rainfall exhibited negative trends with p>0.05 and p<0.05, respectively. Positive subtrends in rainfall occurred in the 1950s and from the mid-2000s till 2016; however, negative subtrends existed between 1960 till around 2005. Seasonal evapotranspiration exhibited a positive trend (p>0.05). For the entire period (1948–2016), there was no negative subtrend in the OND and MAM evapotranspiration. Rainfall and evapotranspiration trends and oscillatory variation in subtrends over multidecadal time scales indicate the need for careful planning of predictive adaptation to the impacts of climate variability on environmental applications which depend on water balance in the Mpologoma catchment. It is recommended that future studies quantify possible contributions of human factors on the variability of rainfall and evapotranspiration. Furthermore, climate change impacts on rainfall and evapotranspiration across the study area should be investigated.http://dx.doi.org/10.1155/2020/8870935 |
| spellingShingle | Ambrose Mubialiwo Charles Onyutha Adane Abebe Historical Rainfall and Evapotranspiration Changes over Mpologoma Catchment in Uganda Advances in Meteorology |
| title | Historical Rainfall and Evapotranspiration Changes over Mpologoma Catchment in Uganda |
| title_full | Historical Rainfall and Evapotranspiration Changes over Mpologoma Catchment in Uganda |
| title_fullStr | Historical Rainfall and Evapotranspiration Changes over Mpologoma Catchment in Uganda |
| title_full_unstemmed | Historical Rainfall and Evapotranspiration Changes over Mpologoma Catchment in Uganda |
| title_short | Historical Rainfall and Evapotranspiration Changes over Mpologoma Catchment in Uganda |
| title_sort | historical rainfall and evapotranspiration changes over mpologoma catchment in uganda |
| url | http://dx.doi.org/10.1155/2020/8870935 |
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