Environmental function for determination of sand origin

arena beaches dunas dune dune soils dunes environmental effects grosseur des particules irak iraq mathematics muestreo particle size pedogenese plage playas river terrace soils sable sampling sand sedimentation site factors soil chemicophysical properties soil genesis soil texture sol de dune sol de terrasse fluviale suelo de dunas suelo de terrazas fluviales textura textura del suelo texture texture du sol