A field parcel-oriented approach to evaluate the crop cover-management factor and time-distributed erosion risk in Europe  

作　　者：Francis Matthews Gert Verstraeten Pasquale Borrelli Panos Panagos 

机构地区：[1]European Commission,Joint Research Centre(JRC),Ispra,Italy [2]Department of Earth and Environmental Sciences,KU Leuven,Belgium [3]Department of Science,Roma Tre University,00146,Rome,Italy

出　　处：《International Soil and Water Conservation Research》2023年第1期43-59,共17页国际水土保持研究（英文）

摘　　要：The crop cover-management(C-)factor in arable landscapes describes the soil erosion susceptibility associated with seasonally cultivated crops.Previous informatic and computational limitations have led many modelling studies to prescribe C-factor values and assume spatial and temporal stationarity.However,the multiple influencing factors ranging from parcel-scale crop cultivation and management to regional-scale rainfall regimes motivates new methods to capture this variation when identifying at-risk areas.Here,we define a multi-component method to derive the C-factor by associating time series of canopy and residue surface cover from Sentinel-2 and climate-specific rainfall erosivity with Integrated Administration and Control System(IACS)field parcel data from European Union member states.A scalable and standardised method is emphasised to increase the future interoperability and inter-comparability of soil erosion modelling studies deploying the C-factor.Additionally,field parcel simu-lation units with associated crop declarations provide a new reference scale to link predictions of soil erosion risk with specific management decisions and declarations by farmers.After implementing the method on a homogenised subsample of 8600 field parcels covering available IACS regions,several key findings are outlined:1)time series information provides new opportunities to predict the time-criticality of erosion in specific crop cultivations,2)the varying(a-)synchronicity between seasonal crop canopy cover and heavy rainstorms means that spatial variability is inherent within the C-factor across Europe,and 3)the addition of agricultural management practices(e.g.tillage practice de-scriptions)to open-access IACS repositories can facilitate more comprehensive evaluations of the C-factor and soil erosion risk.

关 键 词：C-FACTOR Soil erosion Modelling Remote sensing Crop-phenology IACS data Soil conservation EUROPE 

分 类 号：S157[农业科学—土壤学]