Eco-hydrology of the Pangani River Downstream of Nyumba ya Mungu Reservoir, Tanzania

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dc.creatorMwamila, Tulinave B.
dc.creatorKimwaga, Richard
dc.creatorMtalo, Felix W.
dc.date2016-03-23T06:45:37Z
dc.date2016-03-23T06:45:37Z
dc.date2008-01
dc.date.accessioned2018-03-27T08:40:39Z
dc.date.available2018-03-27T08:40:39Z
dc.descriptionEco-hydro­log­i­cal stud­ies are highly empha­sized world­wide at the moment espe­cially where hydrau­lic struc­tures such as dams are con­cerned, mainly focus­ing on ben­e­fit­ing both humans and exist­ing eco­system for the pres­ent and future gen­er­a­tions. The study at Pan­gan­i basin was aimed at assess­ing the suf­ficiency and the amount of flow reach­ing the down­stream area of the Pan­gan­i River for main­te­nance of eco­sys­tem. Fish spe­cies were con­sid­ered as the indi­ca­tors for eco­sys­tem health. Flow dura­tion curves (FDC) and hy­dro­graphs were devel­oped by using the col­lected his­tor­i­cal daily flow data and used for assess­ing the flow var­i­a­tion before and after Ny­umba ya Mun­gu (NYM) dam con­struction. The results showed that there is no sea­son­al­i­ty and that for most part of the year the flow is within 20–40m3/s. From the com­par­i­son it was found that there is 42.7% decrease in Q5, 2.1% decrease in Q95, 38.9% increase in Q75, 23.4% increase in Q50 and decrease of per­cent­age ex­cee­dence of 50m3/s by 61.5%. Phys­i­cal hab­i­tat sim­u­la­tion model (PHAB­SIM) was used for hydrau­lic sim­u­la­tion incor­po­rat­ing geo­met­ric and flow data col­lected in the field. From the sim­u­la­tions min­i­mum flow for hab­i­tat pro­tec­tion is about 15m3/s and for flood for­ma­tion flows should be greater than 50m3/s. Thus the required res­er­voir out­flow for sus­tain­able water resources man­age­ment at the NYM should fol­low the above spec­i­fi­ca­tions.
dc.identifierMwamila, T.B., Kimwaga, R.J. and Mtalo, F.W., 2008. Eco-hydrology of the Pangani River downstream of Nyumba ya Mungu reservoir, Tanzania. Physics and Chemistry of the Earth, Parts A/B/C, 33(8), pp.695-700.
dc.identifierhttp://hdl.handle.net/123456789/1226
dc.identifier10.1016/j.pce.2008.06.054
dc.identifier.urihttp://hdl.handle.net/123456789/3041
dc.languageen
dc.publisherElsevier
dc.subjectFlow dura­tion curve
dc.subjectHydrau­lic param­e­ters
dc.subjectMicro­hab­i­tat
dc.subjectEco­hy­drol­o­gy
dc.subjectPhys­i­cal hab­i­tat
dc.titleEco-hydrology of the Pangani River Downstream of Nyumba ya Mungu Reservoir, Tanzania
dc.typeJournal Article, Peer Reviewed

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