The objective of this paper was to evaluate the hidrossedimentologic parameters of the Piquiri river and 
relating them to basin land use systems. They were monitored the parameters of flood and suspension sediment 
concentrations during the period from August/2007 to April/2008 in Piquiri bridge station, Ubiratã, PR town, BR-369. 
They determined the rating curve of flood (R2 
 
=0,99), rating curve of suspension sediment concentrations (R2 
=0,95), 
 
rating curve of daily total discharge of sediments (R2 
 
=0,98) and rating curve of turbidity in function of suspension 
 
sediments (R2 
 
=0,94), being that all presented good settlements. The results indicated that can be classified in a very 
 
decrease it moderated the output of sediments of the basin.O objetivo deste trabalho foi avaliar os parâmetros hidrossedimentologic do rio Piquiri e relacioná-los com 
sistemas de uso da terra da bacia. Eles foram monitorados os parâmetros de inundação e concentrações de sedimentos 
em suspensão durante o período de agosto/2007 a abril/2008 na estação ponte Piquiri, Ubiratã, cidade PR, BR-369. Eles 
determinaram a curva de classificação de inundação (R2 = 0,99), a curva de avaliação das concentrações de sedimentos 
em suspensão (R2 = 0,95), a curva de classificação de descarga total diária de sedimentos (R2 = 0,98) ea curva de 
avaliação de turbidez em função de sedimentos em suspensão (R2 = 0,94), sendo que todos apresentaram bons 
sedimentos. Os resultados indicaram que podem ser classificados em um decréscimo muito que moderou a saída de 
sedimentos da bacia

Angst, Fernando

Martins Gomes, Benedito

Queiroz, Manoel Moisés F. de

The objective of this paper was to evaluate the hidrossedimentologic parameters of the Piquiri river and relating them to basin land use systems. They were monitored the parameters of flood and suspension sediment concentrations during the period from August/2007 to April/2008 in Piquiri bridge station, Ubiratã, PR town, BR-369. They determined the rating curve of flood (R2=0,99), rating curve of suspension sediment concentrations (R2=0,95), rating curve of daily total discharge of sediments (R2=0,98) and rating curve of turbidity in function of suspension sediments (R2=0,94), being that all presented good settlements. The results indicated that can be classified in a very decrease it moderated the output of sediments of the basi

Manoel Moisés F. de Queiroz

Fernando Angst

Benedito Martins Gomes

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Revista Verde de Agroecologia e Desenvolvimento Sustentável Artigo Científico 
http://revista.gvaa.com.br                                                                                              ISSN 1981-8203 
________________________ 
*Autor para correspondência 
Recebido para publicação em 20/02/2012; Aprovado em 10/08/2013 
* Universidade Federal de Campina Grande, Campus Pombal-PB, Rua Jairo Vieira Feitosa, s/n, 
Bairro dos Pereiros,58.840-000, Pombal-PB,BR. E-mail - moises@ccta.ufcg.edu.br 
**Universidade Estadual do Oeste do Paraná, Rua Universitaria, 2069, Jardim Universitário, 
85.819-110, Cascavel-PR, BR. E-mail fangst@hotmail.com,  simoned@unioeste.br 
Revista Verde (Mossoró – RN - Brasil), v. 8, n. 3, p. 36 - 40, jul – set , 2013 
 
  
 
Hidrossedimentologic study in piquiri river 
 
Estudo hidrossedimentologico no rio piquiri 
 
 
 
 
 
Manoel Moisés F. de Queiroz*; Fernando Angst **; Benedito Martins Gomes** 
 
 
. 
 
Abstract - The objective of this paper was to evaluate the hidrossedimentologic parameters of the Piquiri river and 
relating them to basin land use systems. They were monitored the parameters of flood and suspension sediment 
concentrations during the period from August/2007 to April/2008 in Piquiri bridge station, Ubiratã, PR town, BR-369. 
They determined the rating curve of flood (R
2
=0,99), rating curve of suspension sediment concentrations (R
2
=0,95), 
rating curve of daily total discharge of sediments (R
2
=0,98) and rating curve of turbidity in function of suspension 
sediments (R
2
=0,94), being that all presented good settlements. The results indicated that can be classified in a very 
decrease it moderated the output of sediments of the basin. 
 
 
Key words: suspended sediment, flood, rating curve 
 
 
Resumo - O objetivo deste trabalho foi avaliar os parâmetros hidrossedimentologic do rio Piquiri e relacioná-los com 
sistemas de uso da terra da bacia. Eles foram monitorados os parâmetros de inundação e concentrações de sedimentos 
em suspensão durante o período de agosto/2007 a abril/2008 na estação ponte Piquiri, Ubiratã, cidade PR, BR-369. Eles 
determinaram a curva de classificação de inundação (R2 = 0,99), a curva de avaliação das concentrações de sedimentos 
em suspensão (R2 = 0,95), a curva de classificação de descarga total diária de sedimentos (R2 = 0,98) ea curva de 
avaliação de turbidez em função de sedimentos em suspensão (R2 = 0,94), sendo que todos apresentaram bons 
sedimentos. Os resultados indicaram que podem ser classificados em um decréscimo muito que moderou a saída de 
sedimentos da bacia. 
 
 
Palavras-chave: sedimentos em suspensão, inundação, curva classificação. 
 
. 
 
 
 
 
 
 
 
 
 
 
 
 
 
Manoel Moisés F. de Queiroz; Fernando Angst e Benedito Martins Gomes 
Revista Verde (Mossoró – RN - Brasil), v. 8, n. 3, p. 36 - 40, jul – set , 2013 
 
 
 
INTRODUCTION  
 
 The production of sediment and pollutants 
within a river basin systems almost always reaches its 
downstream basins, and the river basin Piquiri is part of 
the Paraná river basin, draining about 30 km above the 
beginning of the Itaipu Reservoir. The sediments 
produced in the basin that are deposited along the river 
course are carried by the Paraná River and subsequently 
deposited in the reservoir causing serious siltation and 
eventually can cause the decrease of the potential power 
generation of the Itaipu hydroelectric dam. The pollutants 
also cause several problems within the basin such as 
eutrophication of environments, especially in the reservoir 
where nutrients will focus. 
Pollutants resulting from agricultural runoff surface are 
composed of sediments, nutrients, pesticides and animal 
wastes. For Brazilian conditions, has not quantified how 
much these pollutants contribute to the degradation of 
water resources (MERTEN e MINELLI, 2002). 
The presence of nutrients in water and sediment 
that is carried by the river which can demonstrate the 
degree of pollution that is being generated by the basin 
and systems to prevent runoff from agricultural areas are 
effective. 
According Machado & Vetotorazzi  (2003) the 
hydrological processes associated with land use and 
management of exercise clearly play a dominant role in 
the production and sediment transport. With the excessive 
increase in solid concentration and solid discharge of 
water sources, can occur over time, siltation, which in 
addition to modify or degrade water quality, fauna and 
flora (CARVALHO et al, 2000), causes a decrease water 
velocity, resulting also in reduced water availability. The 
sediments are probably the most significant of all 
pollutants in terms of its concentration in water, its impact 
on water use and its effects on transport of other pollutants 
(MACHADO e VETORAZZI, 2003). 
The objective of this paper was to evaluate the 
hidrossedimentologic parameters of the Piquiri river and 
relating them to basin land use systems. They were 
monitored the parameters of flood and suspension 
sediment concentrations during the period from 
August/2007 to April/2008 in Piquiri bridge station, 
Ubiratã, PR town, BR-369. 
 
MATERIALS AND METHODS 
 
 
The collection of water samples were taken at the 
station located on Bridge Piquiri BR - 369 Ubiratã 
municipality, latitude and longitude 24:31:0 53:10:0. 
(HIDROWEB, 2008). The section of the basin above the 
station has drainage area of 11,303 km2. The site where it 
has installed the station altitude of 310 m. The place 
where the collections were made presents approximate 
width of 187 m, rocky bottom with not allowing the 
collection of material bed. 
We conducted a total of seven campaigns of flow 
during the period August 2007 to April 2008. For liquid 
flow measurement method was used to speed-area, where 
the flow velocity was obtained with hydrometric vane 
model MLN-07 (Figure 2). We carried out the bathymetry 
of the river every ten meters for a total of 18 vertical along 
the river with the help of the winch attached to a 
hydrometric ballast is also taken these points of data flow 
velocity at two points in the vertical, where the the river 
was deeper than 60 cm and at a point where the depth was 
less than 60cm. The area was determined from the width 
of the river outlet with the aid of steel cable and graduated 
vessel and depth (Figure 2). 
The speeds of each point were calculated using the 
number of turns of the helix reel (equation 1), through the 
equation reel MLN-07 for the propeller JC 017/06 
(equations 2 and 3).  
 
 
 
N = Nº of pulses/50 of seconds                                                   (1) 
 
 
V = 0.01641847 +0.25366065 * N   for N <0.5051                      (2) 
 
 
V = 0.00233053 +0.28154932 * N   for N> 0.5051                      (3) 
 
 
The area of each section was calculated by 
multiplying the depth by the width. With the data area and 
average speed in the vertical flow was calculated for each 
section, these flows being combined to determine the total 
river flow. The method used was the method of the half 
section (SANTOS et al., 2001). 
The method used for measuring solid discharge 
was indirect. In this method were carried out in the field 
of material collected and analyzed the concentrations in 
the laboratory. The collection of material in suspension 
was evaluated by means of vertical integration with Equal 
Width Increment (IIL). The equipment used was the DH-
49 sampler attached to the winch on the fluviometric 
aluminum boat. For the quantification of suspended 
sediment was used the method of filtering and 
evaporation. The analysis of sediment concentration were 
performed in the laboratory Hidrossedi-mentologia 
Unions, Campus of Cascavel-PR. 
 
RESULTS AND DISCUSSION 
 
Rating curves of flood and suspended sediments 
Hidrossedimentologic study in piquiri river 
Revista Verde (Mossoró – RN - Brasil), v. 8, n. 3, p. 36 - 40, jul – set , 2013 
 For the rating curve quota-flow (Figure 1) and rating 
curve flow-sediment (Figure 2) we used data from seven 
campaigns. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 1 - Rating curve  
quota-flow.  
 
The relationship that best expressed the curve above was the key polynomial with coefficient of determination R2 = 
0.998. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 2 - Rating  curve  flow-sediment.  
 
The Piquiri river can be considered very low to 
moderate concentrations of suspended sediments. with a 
concentration ranging from 46 to 140 mg.L-1, and an 
average concentration for the study area of 74 mg.L-1 . 
These results may suggest that soil conservation 
techniques, widely used in the basin under study, reduce 
the amount of sediment reaching the water body ( LIMA 
et al., 2004) 
The mathematical equation that best expressed 
the rating curve between the river flow and suspended 
sediment concentration was the polynomial with R
2
 = 0.95 
(Figure 2). For the total daily discharge of sediment was 
also the polynomial equation that best expressed the data, 
with R
2
 = 0.98 (Figure 3). 
 
 
y = 0,0024x2 + 1,5954x - 39,882
R2 = 0,9984
0
50
100
150
200
250
300
0 20 40 60 80 100 120 140 160 180
H (cm)
Q
 (
m
3
.s
-1
)
Dados observados
Curva-chave
y = 0,014x2 + 0,1487x + 60,468
R2 = 0,9519
0
50
100
150
200
250
300
0 20 40 60 80 100 120 140
Cs (mg.L-1)
Q
 (
m
3
.s
-1
)
Dados observados
Curva-chave
Manoel Moisés F. de Queiroz; Fernando Angst e Benedito Martins Gomes 
Revista Verde (Mossoró – RN - Brasil), v. 8, n. 3, p. 36 - 40, jul – set , 2013 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 3 – Rating curve between the river flow and total daily discharge of sediment 
 
 
 
Bicalho (2006) found a R
2
 = 0.99 for the rating 
curve solid discharge for the same number of campaigns. 
According Lima et al. (2004) and Carvalho et al (2000), 
the rating curve solid discharge generally has the form of 
power. LIMA et al. (2004), studying the solid discharge in 
Piquiri river a point near the sampling point, found the 
best relationship between flow and solid discharge in the 
form of power with an R
2
 = 0.82. In the same work in 
other seasons the best fit of data was  rating curve of 
polynomial form. 
The daily sediment discharge measured at the 
sample ranged from one-eighth t.dia for the month of 
April to a discharge of 2789 t.dia-1 in November. Lima et 
al. (2004) determined an average daily solid discharge to 
the region of sampling of 2447 t.dia
-1
. The study analyzed 
the parameters of turbidity of the river and this data was 
an established relationship with the data of concentration 
of suspended sediments. The relationship was to 
determine if there is the possibility of assessing the 
concentration of suspended sediment by turbidity data. 
The best fit rating curve to the data was the 
polynomial with R
2
 = 0.948 (Figure 4) demonstrated good 
fit to the data of turbidity against of suspended sediments 
concentrations, suggesting that the turbidity data can be 
useful for determining of suspended sediment 
concentrations in a river.  Carvalho et al. (2000) also 
determined the rating curve turbidity in relation to the 
concentration of suspended sediments with R
2
 = 0.8. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 4- Rating curve of turbidity and suspended sediments concentrations. 
 
 
 
 
y = -8E-06x2 + 0,1x + 58,685
R2 = 0,9834
0
50
100
150
200
250
300
0 500 1000 1500 2000 2500 3000
Qss (t.dia -1)
Q
 (
m
3
.s
-1
)
Dados observados
Curva-chave
y = -0,0002x2 + 0,2235x + 1,5859
R2 = 0,9485
0
5
10
15
20
25
30
0 20 40 60 80 100 120 140
Cs (mg.L-1)
T
u
rb
id
e
z
 (
N
T
U
)
Dados observados
Curva-chave
Hidrossedimentologic study in piquiri river 
 
Revista Verde (Mossoró – RN - Brasil), v. 8, n. 3, p. 36 - 40, jul – set , 2013 
CONCLUSIONS 
 
The flow rating curve developed in this study had 
a good relationship between elevation and flow with a 
good fit to the data, allowing its use for determining the 
flow of the river from the values of the shares. 
The analysis of suspended sediments showed a 
good relationship to rating curve. The results show that 
the river can be classified as very low to moderate 
concentrations of suspended sediments, with good 
conservation practices in the management and land use of 
the basin, which cause fewer emissions of sediment to the 
river's course. 
The relationship between suspended sediments 
concentrations and water turbidity showed good 
relationship and can be used to water turbidity to estimate 
suspended sediments concentrations. 
 
REFERÊNCES 
 
BICALHO, C. C. Estudo do transporte de sedimento 
em suspensão na bacia do rio Descoberto. Dissertação 
(Mestrado em Tecnologia Ambiental e Recursos Hídricos) 
UNB. Brasília, DF. 2006. 
CARVALHO, N. de O.; FILIZOLA JUNIOR, N. P.; 
SANTOS, P. M. C. dos; LIMA, J. E. F. W. Guia de 
avaliação de assoreamento de reservatórios. Brasília: 
ANEEL, 2000, 132p. 
 
CARVALHO, N. de O.; FILIZOLA JUNIOR, N. P.; 
SANTOS, P. M. C. dos; LIMA, J. E. F. W. Guia de 
práticas sedimentométricas. Brasília: ANEEL, 2000. 
154p. 
 
HIDROWEB, AGÊNCIA NACIONAL DE ÁGUAS 
(ANA). Banco de dados HIDROWEB. Disponível em 
http://hidroweb.ana.gov.br/. Acesso em 01/03/2008. 
LIMA, J. E. F. W. et al. Diagnóstico do fluxo de 
sedimentos em suspensão na 
Bacia Araguaia-Tocantins. Planaltina, DF : Embrapa 
Cerrados, Brasília, DF. ANEEL. ANA, 2004. 
 
MACHADO, R. E.; VETTORAZZI, C. A. Simulação da 
produção de sedimentos para a microbacia 
hidrográfica do Ribeirão dos Marins. Revista Brasileira 
de Ciência do Solo, 27: 735-741, 2003 
 
MERTEN, G. H.; MINELLA, J. P. Qualidade da água 
em bacias hidrográficas rurais: um desafio atual para 
a sobrevivência futura. Revista Agroecologia e 
Desenvolvimento Rural Sustentável: EMATER, Porto 
Alegre/RS, v.3, n.4. 2002. 
 
 
 


Revista Verde de Agroecologia e Desenvolvimento Sustentável

Hidrossedimentologic study in piquiri river

DIALNET

Gomes, Benedito Martins

LAReferencia - Red Federada de Repositorios Institucionales de Publicaciones Científicas Latinoamericanas

The objective of this paper was to evaluate the hidrossedimentologic parameters of the Piquiri river and relating them to basin land use systems. They were monitored the parameters of flood and suspension sediment concentrations during the period from August/2007 to April/2008 in Piquiri bridge station, Ubiratã, PR town, BR-369. They determined the rating curve of flood (R2=0,99), rating curve of suspension sediment concentrations (R2=0,95), rating curve of daily total discharge of sediments (R2=0,98) and rating curve of turbidity in function of suspension sediments (R2=0,94), being that all presented good settlements. The results indicated that can be classified in a very decrease it moderated the output of sediments of the basin</span

Hidrossedimentologic study in piquiri river

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LAReferencia - Red Federada de Repositorios Institucionales de Publicaciones Científicas Latinoamericanas

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