Reducing the hydrological connectivity of gully systems through vegetation restoration: combined field experiment and numerical modelling approach

A. Molina, G. Govers, A. Van den Putte, V. Vanacker
2009 Hydrology and Earth System Sciences Discussions  
Restoration of degraded land in the southern Ecuadorian Andes has led to alterations in the functioning of degraded catchments. Recovery of vegetation on areas affected by overgrazing, as well as the reforestation or afforestation of gully areas have given rise to modifications of hydrological connectivity within the catchments. Recent research 5 HESSD Abstract Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Printer-friendly Version Interactive Discussion runoff
more » ... Discussion runoff width W . The high sensitivity of model results to some crucial hydraulic parameters is one of the reasons why the relationships between model parameter values and gully features are relatively weak. The results obtained from the field experiments and the kinematic wave model show that gully systems are key elements in the hydrological connectivity of degraded land-5 scapes. The transfer of overland flow and sediment from the slopes towards the river system highly depends on the presence/absence of vegetation in the gully beds and should therefore be accounted for in assessments of landscape degradation and/or recovery.
doi:10.5194/hessd-6-2537-2009 fatcat:u6sjgvq7vbay7p5s6zjypgb7tu