A review of concentrated flow erosion processes on rangelands:Fundamental understanding and knowledge gaps

作     者：Sayjro K.Nouwakpo Christopher J.Williams Osama Z.Al-Hamdan Mark A.Weltz Fred Pierson Mark Nearing 

作者机构：University of NevadaRenoDepartment of Natural Resources and Environmental Science1664 N.Virginia StreetRenoNV 89557USA USDAARSNorthwest Watershed Management Research800 Park BLVD.STE 105BoiseID 83712USA Texas A&M University–KingsvilleDepartment of Civil and Architectural EngineeringKingsvilleTX 78363USA USDAARSGreat Basin Rangelands Research920 Valley RoadRenoNV 89512USA USDAARSSouthwest Watershed Research2000 East Allen RoadTucsonAZ 85719USA 

出 版 物：《International Soil and Water Conservation Research》 (国际水土保持研究（英文）)

年 卷 期：2016年第4卷第2期

页      面：75-86页

学科分类：08[工学] 0815[工学-水利工程] 

主　　题：Erosion Rangeland Concentrated flow Rill Gully 

摘      要：Concentrated flow erosion processes are distinguished from splash and sheetflow processes in their enhanced ability to mobilize and transport large amounts of soil,water and dissolved *** rangelands,soil,nutrients and water are scarce and only narrow margins of resource losses are tolerable before crossing the sustainability *** these ecosystems,concentrated flow processes are perceived as indicators of degradation and often warrant the implementation of mitigation ***,this negative perception of concentrated flow processes may conflict with the need to improve understanding of the role of these transport vessels in redistributing water,soil and nutrients along the rangeland *** influences the development and erosion of concentrated flowpaths and has been the primary factor used to control and mitigate erosion on *** the ecohydrologic level,vegetation and concentrated flow pathways are engaged in a feedback relationship,the understanding of which might help improve rangeland management and restoration *** this paper,we review published literature on experimental and conceptual research pertaining to concentrated flow processes on rangelands to:(1)present the fundamental science underpinning concentrated flow erosion modeling in these landscapes,(2)discuss the influence of vegetation on these erosion processes,(3)evaluate the contribution of concentrated flow erosion to overall sediment budget and(4)identify knowledge gaps.