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100			_aSidle, Roy C. _950660
245			_aHydrogeomorphic processes affecting dryland gully erosion: Implications for modelling/
260			_bSage, _c2019.
300			_aVol 43, issue 1, 2019 : (46-64 p.).
520			_aGullies contribute high sediment loads to receiving waters and significantly degrade landscapes. In drylands, low annual rainfall and resultant poor ground cover, coupled with high-intensity storms and dispersive soils, predispose these landscapes to gully erosion. Land management, such as grazing, exacerbates gully-forming processes by degrading ground cover and compacting soils, thereby increasing and concentrating overland flow. Current surface erosion models do not adequately represent sediment export from gullied terrain due to lack of distributed data and complex hydrogeomorphic processes, such as overland flow concentration, waterfall erosion, soil pipe collapse, and mass wasting. Here, we outline the strengths and weaknesses of past modelling approaches in erodible terrain and focus on how gully erosion processes can be better simulated at appropriate scales using newly available remote-sensing techniques and databases, coupled with improved understanding of relevant hydrogeomorphic processes. We also discuss and present examples of challenges related to assessing land management practices in drylands that affect gully erosion.
650			_aErosion, gully development, _950661
650			_a hydrogeomorphology, _950662
650			_aland management, _950663
650			_adrylands, _950664
650			_asediment production _950665
700			_aJarihani, Ben _950666
700			_aKaka, SanLinn Ismail _950667
700			_aKoci, Jack _950668
700			_aAl-Shaibani, Abdulaziz _950669
773	0		_012665 _916502 _dLondon: Sage Publication Ltd, 2019. _tProgress in Physical Geography: Earth and Environment/ _x03091333
856			_uhttps://doi.org/10.1177/0309133318819403
942			_2ddc _cART
999			_c12668 _d12668