Contents lists available atScienceDirectJournal of Hydrology: Regional Studiesjournal homepage:www.elsevier.com/locate/ejrhImpacts of land use and land cover change on surface runoff,discharge and lowflows: Evidence from East Africa | Land Portal | Sécurisation des droits fonciers à travers les données ouvertes

Informations sur la ressource

Date of publication: 
décembre 2018
Resource Language: 
ISBN / Resource ID: 
uonbi:11295/107087

Region:East Africa.Focus:A review of catchment studies (n = 37) conducted in East Africa evaluating the impacts ofLand Use and Land Cover Changes (LULCC) on discharge, surface runoff, and lowflows.New hydrological insights:Forest cover loss is accompanied by increased stream discharges andsurface runoff. No significant difference in stream discharge is observed between bamboo andpine plantation catchments, and between cultivated and tea plantation catchments. Trend ana-lyses show that despite forest cover loss, 63% of the watersheds show non-significant changes inannual discharges while 31% show increasing trends. Half of the watersheds show non-sig-nificant trends in wet seasonflows and lowflows while 35% reveal decreasing trends in lowflows. Modeling studies estimate that forest cover loss increases annual discharges and surfacerunoffby 16 ± 5.5% and 45 ± 14%, respectively. Peakflows increased by a mean of10 ± 2.8% while lowflows decreased by a mean of 7 ± 5.3%. Increased forest cover decreasesannual discharges and surface runoffby 13 ± 1.9% and 25 ± 5%, respectively. Weak corre-lations between forest cover and runoff(r = 0.42, p < 0.05), mean discharge (r = 0.63,p < 0.05) and peak discharge (r = 0.67, p < 0.05) indicate that forest cover alone is not anaccurate predictor of hydrologicalfluxes in East African catchments. The variability in theseresults supports the need for long-termfield monitoring to better understand catchment re-sponses and to improve the calibration of currently used simulation models

Auteurs et éditeurs

Author(s), editor(s), contributor(s): 
Guzha, A C Rufino, M.C. Okoth, S. Jacobs, S. Nóbrega, R.L.B.
Publisher(s): 

 

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Our Vision is to be a world-class university committed to scholarly excellence.

Our Mission is to provide quality university education and training and to embody the aspirations of the Kenyan people and the global community through creation, preservation, integration, transmission and utilization of knowledge.

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