dc.contributor.author |
Wambua, Raphael M. |
|
dc.contributor.author |
Mutua, Benedict M. |
|
dc.contributor.author |
Raude, James M. |
|
dc.date.accessioned |
2022-10-25T07:27:39Z |
|
dc.date.available |
2022-10-25T07:27:39Z |
|
dc.date.issued |
2017-02-16 |
|
dc.identifier.citation |
MOJ Civil Engineering, Volume 2, Issue 2 2017 |
en_US |
dc.identifier.issn |
2572-8520 |
|
dc.identifier.uri |
http://medcraveonline.com/MOJCE/MOJCE-02-00026.pdf |
|
dc.identifier.uri |
http://repository.seku.ac.ke/handle/123456789/6895 |
|
dc.description |
DOI: 10.15406/mojce.2017.02.00026 |
en_US |
dc.description.abstract |
In the present study, temporal and spatial drought-risk events are characterized using a Modified Surface Water Supply Index (SWSI) for upper Tana River basin, located in tropics, Kenya. Forty years (1970-2010) hydro-meteorological data for low, lower middle, middle and high elevations at eight hydro-metric stations was used to characterize spatial and temporal distribution of drought. The spatial drought distribution is obtained via interpolation of hydro-metric stations data using Kriging interpolation technique embedded ArcGIS 10.1 was used. The drought trends were analyzed using a non-parametric Mann-Kendall trend test. The results show that south-eastern parts of the basin are the most drought-prone areas at different drought severities and frequencies. Drought severity classes ranged from 1.69-2.22 to 3.39-4.17 and 2.68-3.21 to 4.37-4.96 in 1970 and 2010 respectively across the river basin. The south-western parts of the basin exhibited highest drought frequency ranging from 10.61 to 13.16 while the north-western areas gave frequency values ranging from 3.74 to 6.29. The findings of the study are applicable in Early Drought Warning Systems, prioritized water resources planning and management. |
en_US |
dc.language.iso |
en |
en_US |
dc.subject |
upper tana river basin |
en_US |
dc.subject |
SWSI |
en_US |
dc.subject |
drought severity |
en_US |
dc.subject |
drought-risk events |
en_US |
dc.subject |
mann-kendall trend test |
en_US |
dc.subject |
drought frequency |
en_US |
dc.title |
Characterization of temporal and spatial drought risk events using surface water supply index (SWSI) in a tropical river basin |
en_US |
dc.type |
Article |
en_US |