Correction of measurement errors on sediment concentration sampled by stirring-sampling method from traditional runoff collection tanks

作     者：Yuhan Huang Mingquan Zhao Hui Zhao Tingwu Lei Ju Tang Wei Wang 

作者机构：Guangxi Key Laboratory of Forest Ecology and ConservationCollege of ForestryGuangxi UniversityNanning 530004China College of Water Resources and Civil EngineeringChina Agricultural UniversityBeijing 100083China Monitoring Center of Soil and Water ConservationMinistry of Water ResourcesBeijing 100053China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess PlateauInstitute of Soil and Water ConservationCAS and MWRYangling 712100China College of Resources and EnvironmentSouthwest UniversityChongqing 400716China College of EngineeringChina Agricultural UniversityBeijing 100083China 

出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)

年 卷 期：2022年第15卷第6期

页      面：134-142页

核心收录：

学科分类：07[理学] 0828[工学-农业工程] 0701[理学-数学] 070101[理学-基础数学] 

基　　金：supported by the“National Key Research and Development Program of China”under Project No.2016YFC0502403 the“National Natural Science Foundation of China”under Project No.41230746,No.51621061 

主　　题：runoff sediment concentration measurement error correction stirring-sampling method 

摘      要：Stirring-sampling method is a widely adopted method to measure sediment concentrations in collection tanks of runoff plots,but with high systematic measurement *** research aimed to advance an approach for building correction equations to remove measurement errors in designed sediment concentration *** data of sediment measurement from the stirring-sampling method,with four representative soils,under the designed sediment concentrations(1,2,5,8,10,20,50,80,100,200,500,800,and 1000 kg/m^(3))were used to demonstrate the correction methodological *** correction methods(step-wise correction and universal correction)were suggested for the trial in this study based on the distribution of measurement *** the step-wise correction,the correction equations were made with a series of linear functions without intercept for the low concentration group(0-20 kg/m^(3)),a series of linear functions with intercept for the high(20-200 kg/m^(3))and extremely high(200-1000 kg/m^(3))concentration groups,*** correction equations were a series of power functions in the universal *** the step-wise correction,most of the relative errors of correction sediment concentrations were smaller than 15%and 10%under high and extremely high concentration groups,but the corrected accuracy was not good in the sediment concentration of 1,2,5 kg/m^(3)with the corrected relative errors of 0.20%-206.07%.For the universal correction,the corrected relative errors(0.19%-31.81%)of the four soils were low under the condition of extremely high sediment concentrations,but other corrected accuracies weren’t good with the corrected relative errors of 0.68%-1154.71%.The corrected accuracy of step-wise correction is higher than that of the universal correction,but the universal correction is more *** results indicated that the correction equations could efficiently revise the measurement errors of the tested soils and that this method can be ge