Simplified Method for the Assessment of Siltation in Semiarid Reservoirs Using Satellite Imagery

Lopes, José Wellington Batista; Araújo, José Carlos de

doi:10.3390/w11050998

Cited by 7 publications

(6 citation statements)

References 44 publications

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“…Therefore, over the years, various methods and tools of study have been developed to predict reservoir sedimentation, from empirical to numerical and physical methods (Pillo et al, 2019). There are also techniques that allow the use of geographic information systems and remote sensing (Lopes & Araújo, 2019).…”

Section: Introductionmentioning

confidence: 99%

Methodology for physical modeling of reservoir sedimentation

Teixeira

Rinco

Coelho

et al. 2020

RBRH

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RESUMO Reservatórios construídos em cursos d’água estão sujeitos a algum grau de assoreamento. Por isso, é importante a estimativa do volume de sedimentos acumulados, visto que esse depósito pode interferir nas funções do reservatório. Uma forma de se fazer isso é utilizando modelos físicos. Entretanto, a partir da literatura existente na área não é possível responder a algumas questões metodológicas que surgem em uma simulação física do assoreamento, como: qual vazão e descarga sólida utilizar? Simular um hidrograma ou uma vazão constante? Assim, esse trabalho teve como objetivo propor uma metodologia de simulação do assoreamento em modelos físicos, de forma que ao se utilizar essa metodologia o assoreamento observado no modelo reduzido pudesse representar o do protótipo. A partir de simulações numéricas e experimentais, optou-se por simular no modelo físico as vazões médias das ondas que compreendiam as vazões máximas. O tempo de escoamento de cada vazão foi de 30 minutos e as descargas sólidas totais utilizadas foram às referentes às vazões médias anuais. Utilizando-se essa metodologia, promoveu-se a simulação do assoreamento no modelo reduzido para o período entre 2013 e 2017, sendo que o resultado obtido foi próximo ao do protótipo, o que indica que a metodologia proposta permitiu representar no modelo reduzido o fenômeno do assoreamento ocorrido no reservatório real.

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Section: Introductionmentioning

confidence: 99%

Methodology for physical modeling of reservoir sedimentation

Teixeira

Rinco

Coelho

et al. 2020

RBRH

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“…The results obtained with the ISODATA in the Poço da Cruz reservoir, for example, were better than the application of NDWI carried out by Costa (2019) and had a reduced tendency to underestimate the surface area. The underestimation tendency was also observed in the calculation of a simplified bathymetry using satellite imagery in the Pentecoste reservoir (state of Ceará) (Lopes & Araújo, 2019). This topic should be investigated in more detail to minimize the effects of the underestimation of the surface area calculation.…”

Section: Resultsmentioning

confidence: 92%

“…The extent of water can also be useful for characterizing the geometry of lakes in combination with satellite altimetry (Arsen et al, 2014;Baup et al, 2014) and in situ water levels (Collischon & Clarke, 2016). Other approaches have been tested in Northeast Brazil using a combination of satellite imagery and field surveys (Lopes & Araújo, 2019), digital elevation models derived from synthetic aperture radar (SAR) images (Zhang et al, 2016), and supervised classification of maximum likelihood (Toledo et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Application of satellite imagery to update depth-area-volume relationships in reservoirs in the semiarid region of Northeast Brazil

Moura

Neto

Costa

2022

Rev. bras. eng. agríc. ambient.

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Reservoirs are the primary source of water supply in the semiarid region of Pernambuco state, Brazil, because of the constant water scarcity affecting this region. Knowledge of the amount of water available is essential for the effective management of water resources. The volume of water stored in the reservoirs is calculated using the depth-area-volume relationship. However, in most reservoirs in the semiarid region, this relationship is currently out of date. Therefore, the objective of this study was to explore the potential and limitations of the application of the ISODATA unsupervised classification method to calculate the depth-area-volume relationships of reservoirs in the semiarid region of Pernambuco, Brazil. The application of the ISODATA method was evaluated in three reservoirs in the state of Pernambuco, i.e., Poço da Cruz, Barra do Juá, and Jucazinho. The results were compared with the updated curves of reservoirs obtained from bathymetry and recent LiDAR surveys. The ISODATA method presented satisfactory results for the three reservoirs analyzed. The mean absolute error of the volume in Poço da Cruz and Barra do Juá was lower than 1% of the maximum capacity. The use of the ISODATA method meant that the surface area underestimation tendency in the Poço da Cruz reservoir was less than when spectral indices were used.

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“…A major challenge, since ancient times, has been the problem of sediment accumulation in the reservoir bowl causing loss of capacity or complete siltation [61][62][63][64][65][66][67][68]. The suspension of sediment movement is associated not only with the loss of functionality of the facility, but also with the disturbance of the channel morphology below the dam cross-section [65].…”

Section: C23-sediment Accumulation [61-68]mentioning

confidence: 99%

Impounding Reservoirs, Benefits and Risks: A Review of Environmental and Technical Aspects of Construction and Operation

Połomski,

Wiatkowski

2023

Sustainability

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The operation of multi-functional reservoirs, together with their benefits and risks, is a complex issue. The scientific and social discussion has been burgeoning recently, and all the more so as no planning and technological solutions for the realisation of storage reservoirs have yet been worked out that could represent a universal approach, assuming ecologically and socially sustainable operations, maximising economic returns and supporting the development of the region concerned. Although the creation of each reservoir facility involves different engineering and environmental considerations, this article attempts to isolate the key benefits of impounding reservoirs and to summarise the risks associated with their operation, considering flood protection, retention, environmental and social aspects and water quality. Based on a review of the scientific literature for each of these aspects, various sub-categories representing intensively developing sectors of research were distinguished, and the published results were used to formulate a register taking into account the spectrum of impact of a given factor and a proposal for remedial action. As a basic conclusion of this review, it can be pointed out that the current development of scientific research, technological progress in hydrotechnical engineering and information technology, as well as advanced data analysis capabilities, provide the basis for developing sustainable solutions to avoid or mitigate the negative impact of all the identified risks. In addition, remedial measures in the catchment area and the reservoir should be taken on board to counteract the negative effects of reservoirs. The results presented can be a valuable source of information for institutions responsible for the planning and implementation of investments in the construction of multi-functional reservoirs.

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Simplified Method for the Assessment of Siltation in Semiarid Reservoirs Using Satellite Imagery

Cited by 7 publications

References 44 publications

Methodology for physical modeling of reservoir sedimentation

Methodology for physical modeling of reservoir sedimentation

Application of satellite imagery to update depth-area-volume relationships in reservoirs in the semiarid region of Northeast Brazil

Impounding Reservoirs, Benefits and Risks: A Review of Environmental and Technical Aspects of Construction and Operation

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