{"id":32370411,"url":"https://github.com/samuel-rosa/prototype-runoff-sample-splitter","last_synced_at":"2026-02-23T12:02:23.337Z","repository":{"id":88301346,"uuid":"105181507","full_name":"samuel-rosa/prototype-runoff-sample-splitter","owner":"samuel-rosa","description":"SAMUEL-ROSA, A.; MOURA-BUENO, J. M.; DALMOLIN, R. S. D. Replacing the (inefficient) manual runoff sampling method used in Brazil – a prototype sample splitter. 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Roraima 1000, Prédio 42, Sala 3309 -- 97105-900 -- Santa Maria,\nRS -- Brasil.\n\n\\* Corresponding author \u003c\u003calessandrorosa@utfpr.edu.br\u003e\u003e\n\n__ABSTRACT__\n\nThe method used to obtain runoff samples in soil erosion monitoring studies is an important source of data \nvariability. In this study, we evaluated the manual sampling method used in Brazil. We present as an\nalternative the prototype of a sample splitter for suspensions with high concentration of total solids. Using\nsoil material with 583 g kg^-1^ of sand and 89 g kg^-1^ of clay, the manual method and the sample splitter were\ntested for their ability to produce representative samples of suspensions with a concentration of 2, 10 and 50\ng L ^-1^ of total solids. An underestimation of 30% or more of the concentration of total solids was observed\nusing the manual method, with a variation of the same magnitude (CV between 20 and 45%). The splitter was\nefficient in producing samples representative of the suspension -- even without altering the particle size\ndistribution of the total solids. Both absolute percentage errors (|\u003c5%|) and the variation between replicates\n(CV \u003c3%) were small. The problems with the manual method are due to the inefficient homogenization that\nfacilitates the differential sedimentation of the particles of different sizes. If these problems are also\nfound in other studies, then the prototype that we developed is a reasonable alternative.\n\n__Keywords:__ Erosion monitoring, Soil loss, Sandy soil, Sample splitter, Uncertainty.\n\nManuscript submitted to [_Scientia Agricola_](sa) on 24-Apr-2019 and recommended for publication -- after two\nrevision rounds -- on 06-Oct-2019 under the title \"Replacing the (inefficient) manual runoff sampling method\nused in Brazil – a prototype sample splitter\".\n\n[sa]: http://www.scielo.br/scielo.php?script=sci_serial\u0026pid=0103-9016\u0026lng=en\u0026nrm=iso\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsamuel-rosa%2Fprototype-runoff-sample-splitter","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fsamuel-rosa%2Fprototype-runoff-sample-splitter","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsamuel-rosa%2Fprototype-runoff-sample-splitter/lists"}