CHAPTER 7 . Hydrography and Sediment Transport Characteristics of the Rio de la Plata
151
Table 7.S. Concentration of suspended sediments (mg 1-') in the Rio de la Plata
Source
Area or section
Range or average
Upper
Urien (1966)
Parana de las Palmas
80 - 330
Rio de la Plata
Rio Uruguay
108 - 234
B. Aires -Punta Gorda
95 - 280
Ottman and Urien (1966)
B. Aires -Colonia
50 - 200
B. Aires -La Plata
80 - 500
Urien (1972)
B. Aires -Colonia
16 - 100
Pizarro and Orlando (1984)
Rio Uruguay
17 - 63
W Pta. Negra -Quilmes
70.9
Harris (1992)
Martin Garcia Channels
141 - 825
Middle
Ottman and Urien (1966)
Whole area
100 - 600
Rio de la Plata
B. Aires -Recalada
10 - 400 (su rface)
20 - 700 (bottom)
Orlando and Perdomo
Whole area
21 - 529
(1989)
103.5
Serra et al. (1992)
Franja Costera Sur
16 - 192
Outer
Ottman and Urien (1966)
Whole area
10 - 400 (surface)
Rio de la Plata
15 - 500 (bottom)
Ayup (1981)
Bahia de Montevideo
8 - 48 (surface)
33 - 628 (bottom)
Nagy (1983)
Whole area
2 - 350
INTECSA (1987)
Bahia de Montevideo
10 - 430
Approach channel
10 - 446
Lopez Laborde et al. (1991) 35 "14'5 -56 "59'W
29 - 76 (surface)
(three tidal cycles)
30 - 123 (bottom)
Lopez Laborde et al. (1991) 35 "06'48"5 -56 "34' 18"W
38 - 346 (surface)
(three tidal cycles)
3 - 266 (bottom)
Lopez Laborde
Montevideo -Pta. del Este
5 - 129 (surface)
(unpublished data)
15 - 206 (bottom)
Whole area
9 - 166 (surface)
8 - 223 (bottom)
Exceptional values: 2.5 g 1- 1 (Ottman and Urien 1966); 657.0 mg 1- 1 (Lopez Laborde, unpublished data),
1.2 g 1- 1 (Harris 1992).
readily through the northern channel, whereas the shallowness of Bahia de Samborombon protects it from wave and current action and encourages the deposition of
fine sediments.
According to Ayup (1986a,b), outer Rio de la Plata does not have an homogeneous
circulation pattern, with very important lateral differences associated with suspended
sediments behaviour. He concludes that:
1. with a type A circulation pattern (stratified), suspended sediments are carried by
freshwater, favouring sediment dispersion, meanwhile processes acting down the
halo cline (flocculation and aggregation) favours deposition;
151
Table 7.S. Concentration of suspended sediments (mg 1-') in the Rio de la Plata
Source
Area or section
Range or average
Upper
Urien (1966)
Parana de las Palmas
80 - 330
Rio de la Plata
Rio Uruguay
108 - 234
B. Aires -Punta Gorda
95 - 280
Ottman and Urien (1966)
B. Aires -Colonia
50 - 200
B. Aires -La Plata
80 - 500
Urien (1972)
B. Aires -Colonia
16 - 100
Pizarro and Orlando (1984)
Rio Uruguay
17 - 63
W Pta. Negra -Quilmes
70.9
Harris (1992)
Martin Garcia Channels
141 - 825
Middle
Ottman and Urien (1966)
Whole area
100 - 600
Rio de la Plata
B. Aires -Recalada
10 - 400 (su rface)
20 - 700 (bottom)
Orlando and Perdomo
Whole area
21 - 529
(1989)
103.5
Serra et al. (1992)
Franja Costera Sur
16 - 192
Outer
Ottman and Urien (1966)
Whole area
10 - 400 (surface)
Rio de la Plata
15 - 500 (bottom)
Ayup (1981)
Bahia de Montevideo
8 - 48 (surface)
33 - 628 (bottom)
Nagy (1983)
Whole area
2 - 350
INTECSA (1987)
Bahia de Montevideo
10 - 430
Approach channel
10 - 446
Lopez Laborde et al. (1991) 35 "14'5 -56 "59'W
29 - 76 (surface)
(three tidal cycles)
30 - 123 (bottom)
Lopez Laborde et al. (1991) 35 "06'48"5 -56 "34' 18"W
38 - 346 (surface)
(three tidal cycles)
3 - 266 (bottom)
Lopez Laborde
Montevideo -Pta. del Este
5 - 129 (surface)
(unpublished data)
15 - 206 (bottom)
Whole area
9 - 166 (surface)
8 - 223 (bottom)
Exceptional values: 2.5 g 1- 1 (Ottman and Urien 1966); 657.0 mg 1- 1 (Lopez Laborde, unpublished data),
1.2 g 1- 1 (Harris 1992).
readily through the northern channel, whereas the shallowness of Bahia de Samborombon protects it from wave and current action and encourages the deposition of
fine sediments.
According to Ayup (1986a,b), outer Rio de la Plata does not have an homogeneous
circulation pattern, with very important lateral differences associated with suspended
sediments behaviour. He concludes that:
1. with a type A circulation pattern (stratified), suspended sediments are carried by
freshwater, favouring sediment dispersion, meanwhile processes acting down the
halo cline (flocculation and aggregation) favours deposition;