CALCULATING BEDLOAD TRANSPORT IN RIVERS: CONCEPTS, CALCULUS ROUTINES AND APPLICATION

Rivers are immensely important to human activities such as water supply, navigation, energy generation, and agriculture. They are also an important morphodynamic agent of erosion, transport and deposition. Their capacity to transport sediment depends on their hydraulic characteristics and can be predicted by mathematical models. Several mathematical models can be used to compute bed-load transport. Each one is appropriately better for certain conditions. In this paper, we present an application built in Microsoft Excel to compute the bed-load transport in rivers based on the Van Rijn mathematical model. The Van Rijn model is appropriate for rivers transporting sandy sediments in conditions of subcritical flow. Hydraulic parameters such as channel slope, stream power, and Reynolds and Froude numbers can be calculated using the application proposed here. The application was tested in the Parana River and results from the calculations are consistent with data obtained from fieldwork surveys. The error of the application was only 20%, which shows good agreement of the model with survey values. ; CNPq ; Mato Grosso do Sul Research Foundation ; Sao Paulo Research Foundation ; National Council of Technological and Scientific Development ; CAPES ; Sao Paulo Research Foundation (FAPESP) ; Univ Estadual Paulista, Inst Geociencias & Ciencias Exatas, Ave 24A,1515, BR-13506900 Rio Claro, SP, Brazil ; Univ Fed Mato Grosso do Sul, Dept Geog, Ave Rio Branco 1270, BR-79304902 Corumba, MS, Brazil ; Univ Fed Sao Paulo, Dept Ciencias Ambientais, Rua Sao Nicolau 210, BR-09913030 Diadema, SP, Brazil ; Univ Kentucky, Dept Earth & Environm Sci, 101 Slone Res Bldg, Lexington, KY 40506 USA ; Univ Fed Sao Paulo, Dept Ciencias Ambientais, Rua Sao Nicolau 210, BR-09913030 Diadema, SP, Brazil ; CNPq: 140334/2015-7 ; CNPq: 308563/2013-1 ; CNPq: 312386/2014-1 ; FUNDECT/CNPq: 083/2016] ; FAPESP: 2007/55987-3 ; FAPESP: 2014/06889-2 ; CNPq: 443437/2014-9 ; CNPq: 447402/2014-5 ; CAPES: 140334/2015-7 ; CAPES: 308563/2013-1 ; CAPES: ...