Sedimentological study of the reservoir of the Manduriacu hydroelectric project, northern Ecuador

Sandoval-Erazo, W.; Toulkeridis, Theofilos; Morales-Sanchez, Á.; Mora, María José Merizalde

doi:10.1088/1755-1315/191/1/012119

Cited by 7 publications

(3 citation statements)

References 3 publications

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“…In the case of USV data, such a problem does not exist as the measurement is performed using hydroacoustic methods, which are recognized and proven measurement techniques. Additional recording of the echogram enables accurate processing of the depth data and removal of noise or measurement errors [72]. It also has the advantage of recording data on profiles, which facilitates the final data processing.…”

Section: Creation Of a Bathymetric Reference Surfacementioning

confidence: 99%

Methodology for Combining Data Acquired by Unmanned Surface and Aerial Vehicles to Create Digital Bathymetric Models in Shallow and Ultra-Shallow Waters

et al. 2021

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This paper presents a method for integrating data acquired by unmanned surface vehicles and unmanned aerial vehicles. The aim of this work was to create a uniform bathymetric surface extending to the shoreline. Such a body of water is usually characterized by ultra-shallow depths, which makes measurement impossible even with hydrographic autonomous vessels. Bathymetric data acquired by the photogrammetric method are, however, characterized by large errors with increasing depth. The presented method is based on processing of two data sets using a bathymetric reference surface and selection of points on the basis of generated masks. Numerical bathymetric models created by interpolation methods confirmed the usefulness of the concept adopted.

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Section: Creation Of a Bathymetric Reference Surfacementioning

confidence: 99%

Methodology for Combining Data Acquired by Unmanned Surface and Aerial Vehicles to Create Digital Bathymetric Models in Shallow and Ultra-Shallow Waters

et al. 2021

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“…In the field, we applied a vessel of a sediment sampling instrument, "van veen", for the extraction in the marine floor, reaching the counter of −10 m below sea level [38]. The depth of the water column has been determined with the weight and rope technique.…”

Section: Methodsmentioning

confidence: 99%

New Perspectives on the Quaternary Paleogeography of Coastal Ecuador and Its Relationships with Climate Change

Quiñónez-Macías,

Chunga,

Toulkeridis

et al. 2023

Quaternary

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Well-preserved Quaternary sedimentary sequences in the central coast of Ecuador have provided sufficient relevant information for paleogeographic reconstruction and climatic evolution, from stratigraphic, geochemical, and biological analysis. The Jaramijo canton site is one of the most remarkable results in the stratigraphic correlation of lithological units with delineation of a paleo sea-cliff of age 14C 43,245 ± 460 B.P. (belonging to the MIS-3). This MIS-3 is associated with a period of glaciation, but the data obtained, such as δ 18O, indicate paleo-temperature values of −1 to −1.5, which are interpreted in this study, indicate that the central coast of Ecuador has an interstadial phase (warm years in a glacial stage). Two more paleo-coastal cliffs have been mapped from orthophoto analysis, but these are younger. The sedimentary levels analyzed in this study include deposits that occurred in MIS 3 to MIS 1. Holocene transgression has modified the central coast of Ecuador and increased the level of coastal climate hazard by sea level rise. Indeed, paleo-coastlines have been evidenced from bathymetric data in the depth contours of −5.5 m and −7.6 m, at 440 and 650 m distances from the up-to-date coastline. For the Jaramijó site, the rate of cliff-erosion and wave-cut platforms are in the order of 1.1 to 2.4 m/yr. These cliff-erosion rates, with a moderate to high coastal vulnerability index, can be increased if we consider mathematical models with an estimated sea-level rise scenario to be, in 2100, about +1 to +1.4 m.

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“…Diaconu et al (2019) emphasized that determining the bathymetric properties of rivers, lakes, and reservoirs enables the identification of areas experiencing sedimentation or erosion. Over the years, bathymetric surveys and mapping have been extensively conducted to gather information about the bottom surfaces of reservoirs (Szatten et al, 2018;Sandoval-Erazo et al, 2018;Oladosu et al, 2019;Lopes and de Araújo, 2019), oceans, and sea floors (Weatherall et al, 2015), as well as rivers (Bandini et al, 2018;Legleiter et al, 2018), lakes (Gopakumar and Takara, 2009;Cross and Moore, 2014;Maina et al, 2019), coastal areas (Salameh et al, 2019), and other water bodies. These efforts aim to investigate water depths, changes in underwater topography, sediment accumulation, and potential environmental impacts.…”

Section: Introductionmentioning

confidence: 99%

Sedimentation Analysis on Seyhan Dam Reservoir Using Long Term Bathymetry Data

Akgül,

Güvel,

Aksu

2024

Mühendislik Bilimleri Ve Tasarım Dergisi

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In this study, sedimentation in the Seyhan Dam reservoir was investigated by analyzing a long-term bathymetric survey dataset. The focus was on understanding how reservoir capacity changes impact reservoir operation rules. The findings revealed that sedimentation from the main branch of the Seyhan River has largely stopped since the construction of the Çatalan Dam, but sedimentation from the Çakıt branch continues. Furthermore, the study observed changes in the upper basin between 1990 and 2018 based on the CORINE Land Cover (CLC) dataset. The forest area increased from 23.71% to 24.36%, and water bodies expanded from 0.3% to 0.9%. This increase in forest and water bodies contributed to a reduction in sediment flow into the Seyhan Dam reservoir. The researchers used regression analysis and found a high correlation (R2=0.96) between water storage capacity changes and time (in years) at a 67.5-meter water level in the Seyhan Dam Reservoir. Overall, the study's results suggest that the decrease in sediment entering from the main branch of the Seyhan River has significantly improved the sedimentation issue.

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Sedimentological study of the reservoir of the Manduriacu hydroelectric project, northern Ecuador

Cited by 7 publications

References 3 publications

Methodology for Combining Data Acquired by Unmanned Surface and Aerial Vehicles to Create Digital Bathymetric Models in Shallow and Ultra-Shallow Waters

Methodology for Combining Data Acquired by Unmanned Surface and Aerial Vehicles to Create Digital Bathymetric Models in Shallow and Ultra-Shallow Waters

New Perspectives on the Quaternary Paleogeography of Coastal Ecuador and Its Relationships with Climate Change

Sedimentation Analysis on Seyhan Dam Reservoir Using Long Term Bathymetry Data

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