Retrospective analysis of Chlorophyll-a and its correlation with climate and hydrological variations in Mindu Dam, Morogoro, Tanzania

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dc.contributor.authorKimambo, Offoro N.
dc.contributor.authorChikoore, Hector
dc.contributor.authorGumbo, Jabulani R.
dc.contributor.authorMsagati, Titus A. M.
dc.date.accessioned2022-01-04T10:22:42Z
dc.date.available2022-01-04T10:22:42Z
dc.date.issued2014-11-06
dc.descriptionResearch articleen_US
dc.description.abstractThe measurement of Chlorophyll-a in aquatic systems has usually correlated to harmful algae in water bodies. Harmful algal blooms (HABs) are as a result of massive proliferation of blue-green algae (Cyanobacteria). Harmful algal blooms (HABs) pose threats to both the environment as well as human health, and despite this well-known fact, their monitoring and management are still challenging. Climate change, extreme weather events, and hy- drological changes are the main drivers and predicted to benefits HABs dynamics in most parts of the world. In Tanzania, studies of HABs proliferation and their possible correlation with variability in climate and hydrology still lag behind despite high demand for developing predicting tools and prevention of HABs proliferation. The present study reports on the retrospective analysis of HABs variation in Mindu Dam located in Morogoro, Tanzania using remote sensing techniques. In the present study comparison between in situ measurement and ocean color (OC2) Chlorophyll-a with the surface reflectance's (band and band combinations) of Landsat 7 and Landsat 8 Operational Land Imager (OLI), was performed. Another approach involved searching for patterns and trends, and teleconnection between Chlorophyll-a index (best band ration) and the climate and hydrological variations in the catchment. The findings demonstrated that minimum and maximum temperatures, solar radi- ation, Chlorophyll-a concentration registered significant increasing trends. Wind speed and directions, water levels for Mindu Dam showed a significant decreasing trend. On the other hand, rainfall showed no trend. The patterns suggest that there are link and causality between the HABs variations and meteorological parameters such as temperatures, solar radiations, and water levels. The study, therefore, contributes to the application of recent advances in remote sensing and retrospectively analysis of bloom dynamics and search for their link with climate and hydrological changes.en_US
dc.identifier.issn2405-8440
dc.identifier.urihttps://www.suaire.sua.ac.tz/handle/123456789/3911
dc.language.isoenen_US
dc.publisherElsevier Ltden_US
dc.subjectAtmospheric scienceen_US
dc.subjectClimatologyen_US
dc.subjectEarth sciencesen_US
dc.subjectEcologyen_US
dc.subjectEnvironmental scienceen_US
dc.subjectHydrologyen_US
dc.subjectRemote sensingen_US
dc.subjectCyanobacteriaen_US
dc.subjectHarmful algal bloomsen_US
dc.subjectChlorophyll-aen_US
dc.subjectRemote sensingen_US
dc.subjectClimate engine toolen_US
dc.titleRetrospective analysis of Chlorophyll-a and its correlation with climate and hydrological variations in Mindu Dam, Morogoro, Tanzaniaen_US
dc.typeArticleen_US
dc.urlwww.heliyon.comen_US

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