Reservoir sedimentation and its effect on storage capacity – A case study of Murera reservoir, Kenya

Iradukunda, Parfait; Bwambale, Erion

doi:10.1080/23311916.2021.1917329

Cited by 28 publications

(15 citation statements)

References 15 publications

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“…Additionally, suspended sediments fill reservoirs and affect water quality [11], increasing maintenance costs for these structures. Moreover, different measurement methods of quantification have been developed to estimate suspended load in rivers.…”

Section: Introductionmentioning

confidence: 99%

Establishment of Monterrey Pine (Pinus radiata) Plantations and Their Effects on Seasonal Sediment Yield in Central Chile

et al. 2023

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Sediment production and transport in a basin are generally a function of the degree of soil protection, normally represented by plant cover. In this study, two basins located at similar latitudes but with different hydrological regimens and plant covers were studied, one with a pluvial regimen and forest plantations (Ñuble) and another one with the pluvio-nival regimen and native forest (Purapel). For this purpose, sediment yield was analyzed in both drainage areas using the Mann-Kendall statistical test. Both basins showed larger amounts of sediment production during winter months. In addition, sediment yield trends did not show significant variation in the case of the Ñuble, most likely due to non-relevant changes in plant cover over time. However, there is a sustained decrease in annual sediment release at Purapel, coinciding with the afforestation in the basin, so it is logical to attribute the referred reduction to this process. For the first time, the behavior of two watersheds is contrasted, one covered with native forest and the other one with forest plantations, appreciating that the basin covered with plantations presents a reduction in sediment production over time, which means that forest plantations are efficient in sediment retention, even in contrast to native forest. However, both basins have different types of soil, topography, etc., meaning that more studies are needed to support this theory.

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Section: Introductionmentioning

confidence: 99%

Establishment of Monterrey Pine (Pinus radiata) Plantations and Their Effects on Seasonal Sediment Yield in Central Chile

et al. 2023

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“…Reservoir sedimentation is the process of sediment being transported into a dam reservoir by streams, and it is a worldwide occurrence that has been seen as a major environmental hazard in recent years (Adongo et al 2020;Ayele et al 2021). Sediment deposition in reservoirs is a significant downstream consequence of soil erosion that endangers the long-term viability of dams built for various purposes in Ethiopia (Froehlich et al 2017;Iradukunda and Bwambale 2021) and elsewhere.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of reservoir sedimentation using bathymetry survey: a case study on Adebra night storage reservoir, Ethiopia

et al. 2022

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Reservoir sedimentation is a serious challenge that reduces reservoir life. Because it decreases the initial capacity of the reservoir and has an impact on drinking water supply, irrigation, and hydropower activities. Inadequate land activities and poor management techniques cause soil erosion and reduce reservoir storage capacity. As a result, accurate sediment estimation was assist in the adoption of sustainable land-use activities and best management practices that lead to effective reservoir operations. The main objective of this study was to evaluate the rate of sedimentation and remaining capacity of Adebra night storage reservoir (NSR) using a bathymetric survey and Arc-GIS 10.8. A comparison of original and current reservoir capacity was used to evaluate the quantity of sediment deposition in the reservoir. The latter was developed using Arc-GIS 10.8 and a bathymetry survey that was used to develop the TIN surface and evaluate reservoir volume. The Adebra NSR reservoir capacity was decreased by the accumulation of sedimentation from 36,902 m3 in 2012 to 27,722 m3 in 2020. The results of this study showed that the Adebra night storage reservoir had lost on average 24.8% of its capacity due to sedimentation, during 8 years of operation. The average deposition rate of sedimentation in Adebra NSR was estimated to be 1147.5 m3/year, with a loss rate of 3.1% per year. The value of sedimentation rates found in live storage of the reservoir area was 1147.5 m3/year. At the current time, the expected life of the night storage reservoir was reduced due to a lack of proper soil conservation practices in the reservoir catchment areas. In general, the study finding showed that the capacity of NSR was reduced by the accumulation of sedimentation year to year throughout the design period. Therefore, to improve the capacity of NSR should be planning and implementing different techniques of sediment control and removal, depending on the estimation of sediment production from watersheds of inlets and outlets of reservoirs.

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“…Furthermore, various research measures of soil erosion have been established, and it is a common opinion that the area affected by erosion can be the best predictor for soil erosion research [22]. Apart from this, soil erosion is the most serious type of land loss that threatens the food security and natural economy of regions, both locally and globally [23,24]. Soil erosion in catchment areas and on the banks of reservoirs and lakes leads to siltation.…”

Section: Introductionmentioning

confidence: 99%

“…The silt is carried downstream by rivers, which eventually lead to reservoirs. The geology, geographical character, climate, plant types, and land use within the drainage basin influence the amount and kind of sediment [24]. According to Kastridis and Kamperidou (2015) [25], the issue of land use is very important and can influence the erosion process in a positive or negative way.…”

Section: Introductionmentioning

confidence: 99%

Soil Erosion Assessment Using the RUSLE Model and Geospatial Techniques (Remote Sensing and GIS) in South-Central Niger (Maradi Region)

Almouctar

Zhao

et al. 2021

Water

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A systematic method, incorporating the revised universal soil loss equation model (RUSLE), remote sensing, and the geographic information system (GIS), was used to estimate soil erosion potential and potential area in the Maradi region of south-central Niger. The spatial trend of seasonal soil erosion was obtained by integrating remote sensing environmental variables into a grid-based GIS method. RUSLE is the most commonly used method for estimating soil erosion, and its input variables, such as rainfall erosivity, soil erodibility, slope length and steepness, cover management, and conservation practices, vary greatly over space. These factors were calculated to determine their influence on average soil erosion in the region. An estimated potential mean annual soil loss of 472.4 t/ac/year, based on RUSLE, was determined for the study area. The potential erosion rates varied from 14.8 to 944.9 t/ac/year. The most eroded areas were identified in central and west-southern areas, with erosion rates ranging from 237.1 to 944.9 t/ac/year. The spatial erosion maps can serve as a useful reference for deriving land planning and management strategies and provide the opportunity to develop a decision plan for soil erosion prevention and control in south-central Niger.

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Reservoir sedimentation and its effect on storage capacity – A case study of Murera reservoir, Kenya

Cited by 28 publications

References 15 publications

Establishment of Monterrey Pine (Pinus radiata) Plantations and Their Effects on Seasonal Sediment Yield in Central Chile

Establishment of Monterrey Pine (Pinus radiata) Plantations and Their Effects on Seasonal Sediment Yield in Central Chile

Evaluation of reservoir sedimentation using bathymetry survey: a case study on Adebra night storage reservoir, Ethiopia

Soil Erosion Assessment Using the RUSLE Model and Geospatial Techniques (Remote Sensing and GIS) in South-Central Niger (Maradi Region)

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