Variabilidade Espacial e Temporal das Características Limnológicas dos Reservatórios Santa Cruz e Umari, Semiárido do Rio Grande do Norte, Brasil

Bibliographic Details
Main Author: Santos, Rafson Varela dos
Publication Date: 2014
Format: Master thesis
Language: por
Source: Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU)
Download full: https://repositorio.ufersa.edu.br/handle/tede/353
Summary: The construction of reservoirs has been adopted as a strategic measure to overcome water shortages and cope with the increase of the multiple uses of this resource. Despite its social importance, the impounding of a lotic ecosystem tends to break possible longitudinal gradients, resulting in biotic and abiotic change both downstream and upstream of the reservoir. In this context, this work sought: (i) to describe the morphometric parameters of the Santa Cruz and Umari reservoirs in the semi-arid region of Rio Grande do Norte; (ii) to spatially and temporally assess the limnological characteristics of these water reservoirs. Bathymetric surveying was carried out in December 2012, with the aid of an ecobathymeter enhanced via DGPS, utilizing horizontal WGS 84 datum and the UTM coordinate system. Four samplings were extracted from the surface, the center and the bottom of the water column (integrated samples) in May, August and November 2012 and February 2013, so that limnological variables could be assessed. With the aid of a multiparameter probe, the following variables were measured in loco: pH, water temperature, electrical conductivity, total dissolved solids, turbidity and dissolved oxygen, and, via utilization of the Secchi disk, water transparence. In the Laboratory of Limnology and Water Quality of the Universidade Federal Rural do Semi-Árido, the concentration of total N, total P, ammoniacal nitrogen, nitrite N, nitrate N and Chlorophyll a was measured. Regression analyses were conducted so as to identify possible relationships between the limnological variables and the distance from the dam, and Principal Component Analyses were carried out in order to observe a spatial pattern of the points sampled during the temporal variation and gather the data concerning the sampling stations (longitudinal variation) and the collections (temporal variation). Bathymetry in Santa Cruz was based on a total of 35.971 point pairs (depth and location) and in Umari, on a total of 26.575. The Santa Cruz reservoir was verified to have a maximum length of 15.984m, average water depth of 13m and maximum depth of 38m. As for the Umari reservoir, maximum length, average depth and maximum depth were confirmed to be 14.227m, 8m and 28m, respectively. In what concerns the storage volume, accentuated differences between the two reservoirs were recorded: 295.858.761m3 in Santa Cruz and 114.866.034m3 in Umari. Despite bearing a smaller volume, Umari presented a larger perimeter area (110.887,26 m). Both reservoirs showed a shallow relative depth which could lead to thermal instability and, consequently, a mixture of the water masses. The results of the PCA showed a spatial pattern in which, as the water ran closer to the influence zone of affluent rivers, there were higher figures of temperature, electrical conductivity, turbidity, total dissolved solids, total P, total N, and Chlorophyll a. However, it could not be verified, in either reservoir, a clear pattern of temporal variation, likely due to the low rainfall during the entire period of sampling. Finally, the reservoirs proved to be adequate for various uses, abiding to the standards set by the CONAMA resolution nº 357/2005, the average concentrations of limnological variables being considered acceptable for Class 1, with the exception of the concentration of total P in the reservoir of Santa Cruz, which was considered acceptable for Class 2. It was concluded that the classic concept of longitudinal compartmentalization with three evident zones (fluvial, transition and lake) did not apply to the reservoirs in this study; therefore, it was only possible to identify partial compartmentalization: the lake zone, accounting for the larger part of both reservoirs and bearing oligotrophic characteristics, and a reduced fluvial zone, varying between mesotrophic and eutrotrophic
id UFER_52a72ac7e12a7f46892c757f8a37d7fc
oai_identifier_str oai:repositorio.ufersa.edu.br:tede/353
network_acronym_str UFER
network_name_str Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU)
repository_id_str
spelling Variabilidade Espacial e Temporal das Características Limnológicas dos Reservatórios Santa Cruz e Umari, Semiárido do Rio Grande do Norte, BrasilSPATIAL AND TEMPORAL VARIABILITY OF LIMNOLOGICAL CHARACTERISTICS IN THE SANTA CRUZ AND UMARI RESERVOIRS, SEMI-ARID REGION OF RIO GRANDE DO NORTE, BRAZILLimnological variablesReservoirMorphometricsSpatial-temporal heterogeneitySemi-aridTrophic state indexVariáveis limnológicasReservatório de águaMorfometriaHeterogeneidade espaço-temporalSemiáridoÍndice de estado tróficoCNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIAThe construction of reservoirs has been adopted as a strategic measure to overcome water shortages and cope with the increase of the multiple uses of this resource. Despite its social importance, the impounding of a lotic ecosystem tends to break possible longitudinal gradients, resulting in biotic and abiotic change both downstream and upstream of the reservoir. In this context, this work sought: (i) to describe the morphometric parameters of the Santa Cruz and Umari reservoirs in the semi-arid region of Rio Grande do Norte; (ii) to spatially and temporally assess the limnological characteristics of these water reservoirs. Bathymetric surveying was carried out in December 2012, with the aid of an ecobathymeter enhanced via DGPS, utilizing horizontal WGS 84 datum and the UTM coordinate system. Four samplings were extracted from the surface, the center and the bottom of the water column (integrated samples) in May, August and November 2012 and February 2013, so that limnological variables could be assessed. With the aid of a multiparameter probe, the following variables were measured in loco: pH, water temperature, electrical conductivity, total dissolved solids, turbidity and dissolved oxygen, and, via utilization of the Secchi disk, water transparence. In the Laboratory of Limnology and Water Quality of the Universidade Federal Rural do Semi-Árido, the concentration of total N, total P, ammoniacal nitrogen, nitrite N, nitrate N and Chlorophyll a was measured. Regression analyses were conducted so as to identify possible relationships between the limnological variables and the distance from the dam, and Principal Component Analyses were carried out in order to observe a spatial pattern of the points sampled during the temporal variation and gather the data concerning the sampling stations (longitudinal variation) and the collections (temporal variation). Bathymetry in Santa Cruz was based on a total of 35.971 point pairs (depth and location) and in Umari, on a total of 26.575. The Santa Cruz reservoir was verified to have a maximum length of 15.984m, average water depth of 13m and maximum depth of 38m. As for the Umari reservoir, maximum length, average depth and maximum depth were confirmed to be 14.227m, 8m and 28m, respectively. In what concerns the storage volume, accentuated differences between the two reservoirs were recorded: 295.858.761m3 in Santa Cruz and 114.866.034m3 in Umari. Despite bearing a smaller volume, Umari presented a larger perimeter area (110.887,26 m). Both reservoirs showed a shallow relative depth which could lead to thermal instability and, consequently, a mixture of the water masses. The results of the PCA showed a spatial pattern in which, as the water ran closer to the influence zone of affluent rivers, there were higher figures of temperature, electrical conductivity, turbidity, total dissolved solids, total P, total N, and Chlorophyll a. However, it could not be verified, in either reservoir, a clear pattern of temporal variation, likely due to the low rainfall during the entire period of sampling. Finally, the reservoirs proved to be adequate for various uses, abiding to the standards set by the CONAMA resolution nº 357/2005, the average concentrations of limnological variables being considered acceptable for Class 1, with the exception of the concentration of total P in the reservoir of Santa Cruz, which was considered acceptable for Class 2. It was concluded that the classic concept of longitudinal compartmentalization with three evident zones (fluvial, transition and lake) did not apply to the reservoirs in this study; therefore, it was only possible to identify partial compartmentalization: the lake zone, accounting for the larger part of both reservoirs and bearing oligotrophic characteristics, and a reduced fluvial zone, varying between mesotrophic and eutrotrophicA construção dos reservatórios vem sendo uma medida estratégica adotada para suprir a escassez de água e atender ao aumento dos usos múltiplos. Apesar de sua importância social, o represamento de um ecossistema lótico tende a romper possíveis gradientes longitudinais, produzindo alterações bióticas e abióticas tanto a jusante quanto a montante do reservatório. Neste contexto, o presente trabalho objetivou: (i) descrever parâmetros morfométricos dos reservatórios Santa Cruz e Umari, localizados no semiárido do Rio Grande do Norte; (ii) avaliar temporalmente e espacialmente as características limnológicas desses reservatórios. O levantamento batimétrico foi realizado em dezembro de 2012, com auxílio de um ecobatímetro acoplado a DGPS, utilizando datum horizontal WGS 84 e sistema de coordenadas em UTM. Já a avaliação das variáveis limnológicas foi realizada nos meses de maio, agosto e novembro de 2012 e fevereiro de 2013, através de quatro coletas na superfície, no meio e no fundo da coluna d água (amostras integralizadas). Com uma sonda multiparâmetros foram mensuradas in loco as seguintes variáveis: pH, temperatura da água, condutividade elétrica (CE), sólidos totais dissolvidos (STD), turbidez (TURB) e oxigênio dissolvido (OD), e por meio do disco de Secchi a transparência da água. No Laboratório de Limnologia e Qualidade de Água da Universidade Federal Rural do Semiárido foram determinadas as concentrações de N-total, P-total, N-amoniacal, N-nitrito, N-nitrato e clorofila a. Foi aplicada a análise de regressão no intuito de identificar possíveis relações entre as variáveis limnológica com a distância da barragem e a Análise dos Componentes Principais (ACP) no intuito de observar um padrão de variação espacial e temporal. A batimetria em Santa Cruz esteve baseada num total de 35.971 pares de pontos (profundidade e localização geográfica) e Umari, 26.575. O reservatório Santa Cruz apresentou 15.984 m de comprimento máximo, 13 m de profundidade média e 38 m de profundidade máxima. Já Umari apresentou para esses mesmos parâmetros 14.227 m, 8 m e 28 m, respectivamente. O volume total de armazenamento em Santa Cruz foi de 295.858.761 m3 e o seu perímetro foi de 94.835 m. Já o reservatório de Umari apresentou um volume total de 114.866.034 m3 e perímetro de 110.887 m. Os reservatórios apresentaram baixa profundidade relativa que induz a uma possível instabilidade térmica e, consequentemente, uma mistura das massas de águas. Os resultados da ACP nos reservatórios Santa Cruz e Umari demonstraram um padrão espacial onde à medida que se aproximava da zona de influência fluvial foram registrados valores mais elevados de CE, STD, P-total, N-total e clorofila a. No entanto, em ambos os reservatórios não foi constatado um nítido padrão de variação temporal, provavelmente devido aos índices pluviométricos reduzidos observados durante todo o período de coletas. Os reservatórios apresentaram-se aptos a serem utilizados pelos diversos usos múltiplos conforme a resolução n° 357/2005 - CONAMA, tendo os valores médios das variáveis limnológicas enquadrados na Classe 1, a exceção do fósforo total que esteve dentro do limite para Classe 2 no reservatório Santa Cruz. Pôde-se concluir que o clássico conceito de compartimentalização longitudinal com a evidência das três zonas (fluvial, transição e lacustre) não foi aplicado aos reservatórios estudados, sendo apenas possível identificar uma compartimentalização parcial, evidenciando duas Zonas bem definidas, a Zona Lacustre, ocupando a maior parte de ambos os reservatórios com características ultraoligotrófica e oligotrófica e uma Zona de influência Fluvial reduzida, variando de mesotrófica e eutróficaCoordenação de Aperfeiçoamento de Pessoal de Nível SuperiorUniversidade Federal Rural do Semi-ÁridoBRCentro de Ciências Agrárias - CCAUFERSAPrograma de Pós-Graduação em Ciência AnimalSilva, Gustavo Henrique Gonzaga daCPF:27200278807http://lattes.cnpq.br/9715919793525325Camargo, Antonio Fernando MonteiroCPF:02629582876CV: http://lattes.cnpq.br/9032220109730468Pontes, Cibele SoaresCPF:48100676453http://lattes.cnpq.br/3943018673158703Santos, Rafson Varela dos2016-08-15T20:31:17Z2014-10-222014-03-27info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdfSANTOS, Rafson Varela dos. SPATIAL AND TEMPORAL VARIABILITY OF LIMNOLOGICAL CHARACTERISTICS IN THE SANTA CRUZ AND UMARI RESERVOIRS, SEMI-ARID REGION OF RIO GRANDE DO NORTE, BRAZIL. 2014. 78 f. Dissertação (Mestrado em Sanidade e Produção Animal) - Universidade Federal Rural do Semi-Árido, Mossoró, 2014.https://repositorio.ufersa.edu.br/handle/tede/353porCC-BY-SAinfo:eu-repo/semantics/openAccessreponame:Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU)instname:Universidade Federal Rural do Semi-Árido (UFERSA)instacron:UFERSA2023-09-14T00:46:44Zoai:repositorio.ufersa.edu.br:tede/353Repositório Institucionalhttps://repositorio.ufersa.edu.br/PUBhttps://repositorio.ufersa.edu.br/server/oai/requestrepositorio@ufersa.edu.br || admrepositorio@ufersa.edu.bropendoar:2023-09-14T00:46:44Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU) - Universidade Federal Rural do Semi-Árido (UFERSA)false
dc.title.none.fl_str_mv Variabilidade Espacial e Temporal das Características Limnológicas dos Reservatórios Santa Cruz e Umari, Semiárido do Rio Grande do Norte, Brasil
SPATIAL AND TEMPORAL VARIABILITY OF LIMNOLOGICAL CHARACTERISTICS IN THE SANTA CRUZ AND UMARI RESERVOIRS, SEMI-ARID REGION OF RIO GRANDE DO NORTE, BRAZIL
title Variabilidade Espacial e Temporal das Características Limnológicas dos Reservatórios Santa Cruz e Umari, Semiárido do Rio Grande do Norte, Brasil
spellingShingle Variabilidade Espacial e Temporal das Características Limnológicas dos Reservatórios Santa Cruz e Umari, Semiárido do Rio Grande do Norte, Brasil
Santos, Rafson Varela dos
Limnological variables
Reservoir
Morphometrics
Spatial-temporal heterogeneity
Semi-arid
Trophic state index
Variáveis limnológicas
Reservatório de água
Morfometria
Heterogeneidade espaço-temporal
Semiárido
Índice de estado trófico
CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA
title_short Variabilidade Espacial e Temporal das Características Limnológicas dos Reservatórios Santa Cruz e Umari, Semiárido do Rio Grande do Norte, Brasil
title_full Variabilidade Espacial e Temporal das Características Limnológicas dos Reservatórios Santa Cruz e Umari, Semiárido do Rio Grande do Norte, Brasil
title_fullStr Variabilidade Espacial e Temporal das Características Limnológicas dos Reservatórios Santa Cruz e Umari, Semiárido do Rio Grande do Norte, Brasil
title_full_unstemmed Variabilidade Espacial e Temporal das Características Limnológicas dos Reservatórios Santa Cruz e Umari, Semiárido do Rio Grande do Norte, Brasil
title_sort Variabilidade Espacial e Temporal das Características Limnológicas dos Reservatórios Santa Cruz e Umari, Semiárido do Rio Grande do Norte, Brasil
author Santos, Rafson Varela dos
author_facet Santos, Rafson Varela dos
author_role author
dc.contributor.none.fl_str_mv Silva, Gustavo Henrique Gonzaga da
CPF:27200278807
http://lattes.cnpq.br/9715919793525325
Camargo, Antonio Fernando Monteiro
CPF:02629582876
CV: http://lattes.cnpq.br/9032220109730468
Pontes, Cibele Soares
CPF:48100676453
http://lattes.cnpq.br/3943018673158703
dc.contributor.author.fl_str_mv Santos, Rafson Varela dos
dc.subject.por.fl_str_mv Limnological variables
Reservoir
Morphometrics
Spatial-temporal heterogeneity
Semi-arid
Trophic state index
Variáveis limnológicas
Reservatório de água
Morfometria
Heterogeneidade espaço-temporal
Semiárido
Índice de estado trófico
CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA
topic Limnological variables
Reservoir
Morphometrics
Spatial-temporal heterogeneity
Semi-arid
Trophic state index
Variáveis limnológicas
Reservatório de água
Morfometria
Heterogeneidade espaço-temporal
Semiárido
Índice de estado trófico
CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA
description The construction of reservoirs has been adopted as a strategic measure to overcome water shortages and cope with the increase of the multiple uses of this resource. Despite its social importance, the impounding of a lotic ecosystem tends to break possible longitudinal gradients, resulting in biotic and abiotic change both downstream and upstream of the reservoir. In this context, this work sought: (i) to describe the morphometric parameters of the Santa Cruz and Umari reservoirs in the semi-arid region of Rio Grande do Norte; (ii) to spatially and temporally assess the limnological characteristics of these water reservoirs. Bathymetric surveying was carried out in December 2012, with the aid of an ecobathymeter enhanced via DGPS, utilizing horizontal WGS 84 datum and the UTM coordinate system. Four samplings were extracted from the surface, the center and the bottom of the water column (integrated samples) in May, August and November 2012 and February 2013, so that limnological variables could be assessed. With the aid of a multiparameter probe, the following variables were measured in loco: pH, water temperature, electrical conductivity, total dissolved solids, turbidity and dissolved oxygen, and, via utilization of the Secchi disk, water transparence. In the Laboratory of Limnology and Water Quality of the Universidade Federal Rural do Semi-Árido, the concentration of total N, total P, ammoniacal nitrogen, nitrite N, nitrate N and Chlorophyll a was measured. Regression analyses were conducted so as to identify possible relationships between the limnological variables and the distance from the dam, and Principal Component Analyses were carried out in order to observe a spatial pattern of the points sampled during the temporal variation and gather the data concerning the sampling stations (longitudinal variation) and the collections (temporal variation). Bathymetry in Santa Cruz was based on a total of 35.971 point pairs (depth and location) and in Umari, on a total of 26.575. The Santa Cruz reservoir was verified to have a maximum length of 15.984m, average water depth of 13m and maximum depth of 38m. As for the Umari reservoir, maximum length, average depth and maximum depth were confirmed to be 14.227m, 8m and 28m, respectively. In what concerns the storage volume, accentuated differences between the two reservoirs were recorded: 295.858.761m3 in Santa Cruz and 114.866.034m3 in Umari. Despite bearing a smaller volume, Umari presented a larger perimeter area (110.887,26 m). Both reservoirs showed a shallow relative depth which could lead to thermal instability and, consequently, a mixture of the water masses. The results of the PCA showed a spatial pattern in which, as the water ran closer to the influence zone of affluent rivers, there were higher figures of temperature, electrical conductivity, turbidity, total dissolved solids, total P, total N, and Chlorophyll a. However, it could not be verified, in either reservoir, a clear pattern of temporal variation, likely due to the low rainfall during the entire period of sampling. Finally, the reservoirs proved to be adequate for various uses, abiding to the standards set by the CONAMA resolution nº 357/2005, the average concentrations of limnological variables being considered acceptable for Class 1, with the exception of the concentration of total P in the reservoir of Santa Cruz, which was considered acceptable for Class 2. It was concluded that the classic concept of longitudinal compartmentalization with three evident zones (fluvial, transition and lake) did not apply to the reservoirs in this study; therefore, it was only possible to identify partial compartmentalization: the lake zone, accounting for the larger part of both reservoirs and bearing oligotrophic characteristics, and a reduced fluvial zone, varying between mesotrophic and eutrotrophic
publishDate 2014
dc.date.none.fl_str_mv 2014-10-22
2014-03-27
2016-08-15T20:31:17Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv SANTOS, Rafson Varela dos. SPATIAL AND TEMPORAL VARIABILITY OF LIMNOLOGICAL CHARACTERISTICS IN THE SANTA CRUZ AND UMARI RESERVOIRS, SEMI-ARID REGION OF RIO GRANDE DO NORTE, BRAZIL. 2014. 78 f. Dissertação (Mestrado em Sanidade e Produção Animal) - Universidade Federal Rural do Semi-Árido, Mossoró, 2014.
https://repositorio.ufersa.edu.br/handle/tede/353
identifier_str_mv SANTOS, Rafson Varela dos. SPATIAL AND TEMPORAL VARIABILITY OF LIMNOLOGICAL CHARACTERISTICS IN THE SANTA CRUZ AND UMARI RESERVOIRS, SEMI-ARID REGION OF RIO GRANDE DO NORTE, BRAZIL. 2014. 78 f. Dissertação (Mestrado em Sanidade e Produção Animal) - Universidade Federal Rural do Semi-Árido, Mossoró, 2014.
url https://repositorio.ufersa.edu.br/handle/tede/353
dc.language.iso.fl_str_mv por
language por
dc.rights.driver.fl_str_mv CC-BY-SA
info:eu-repo/semantics/openAccess
rights_invalid_str_mv CC-BY-SA
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universidade Federal Rural do Semi-Árido
BR
Centro de Ciências Agrárias - CCA
UFERSA
Programa de Pós-Graduação em Ciência Animal
publisher.none.fl_str_mv Universidade Federal Rural do Semi-Árido
BR
Centro de Ciências Agrárias - CCA
UFERSA
Programa de Pós-Graduação em Ciência Animal
dc.source.none.fl_str_mv reponame:Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU)
instname:Universidade Federal Rural do Semi-Árido (UFERSA)
instacron:UFERSA
instname_str Universidade Federal Rural do Semi-Árido (UFERSA)
instacron_str UFERSA
institution UFERSA
reponame_str Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU)
collection Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU)
repository.name.fl_str_mv Repositório Digital da Universidade Federal Rural do Semi-Árido (RDU) - Universidade Federal Rural do Semi-Árido (UFERSA)
repository.mail.fl_str_mv repositorio@ufersa.edu.br || admrepositorio@ufersa.edu.br
_version_ 1809747489754972160