Methodological spot of establishing silt deposit concentration in Serbian rivers

Abstract

Recent methodology of sampling and establishing silt deposit concentration in Serbian rivers is associated to numerous deficiencies. Daily concentrations of this type of river deposit on the most of the hydrological gauges were obtained on the base of only one measurement, which takes into consideration the matter of representative ness of those samples. Taking the samples of deposit in one point on the profile is little bit problematic because of dispersion of the obtained results. Very important matter is the question of choice of the sampling location. This analyses of data may lead to serious spots in calculating total carried deposit. From the above mentioned reasons, we decided to take precise measurements of silt deposit concentration as well as to establish methodological spots of measurements. The results of these measurements are analyzed and presented in this paper.

Dosadašnja metodologija uzimanja uzoraka i utvrđivanja koncentracija suspendovanog nanosa na našim rekama karakteriše se brojnim nedostatcima. Dnevne koncentracije ovog tipa rečnog nanosa na najvećem broju hidroloških stanica dobijene su na osnovu samo jednog merenja čime se postavlja pitanje reprezentativnosti takvih uzoraka. Zahvatanje uzoraka nanosa u jednoj tački profila veoma je problematično zbog velikog stepena rasipanja dobijenih rezultata, a postavlja se i pitanje pravilnog izbora lokacija za obavljanje merenja. Ovakva vrsta podataka može dovesti do ozbiljnih pogrešaka u izračunavanju sumarnog pronosa nanosa. Iz navedenih razloga, pristupilo se ideji sprovođenja preciznijih merenja koncentracija suspendovanog nanosa i utvrđivanju metodološke greške postojećih merenja. Rezultati merenja analizirani su i prikazani u ovom radu.