Problem of Clogging in Drainage Systems in the Examples of the Żur and Podgaje Dams

Sterpejkowicz-Wersocki, Witold

doi:10.1515/heem-2015-0012

Cited by 6 publications

(1 citation statement)

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“…Hydrochemical changes are also relevant in terms of efficiency. Low pH values may accelerate the corrosion of equipment (pipes, pumps, turbines, concrete structures) (Kapil and Bhattacharyya;Sharma et al, 2011), whilst minerals precipitation may alter their mechanical efficiency (Sterpejkowicz-Wersocki, 2014). Thus, hydrochemical changes may lead to a decrease of efficiency and durability of the facilities.…”

Section: Introductionmentioning

confidence: 99%

Hydrochemical changes induced by underground pumped storage hydropower and their associated impacts

Pujades

Jurado

Orban

et al. 2018

Journal of Hydrology

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Underground pumped storage hydropower (UPSH) using abandoned mines is an alternative system to manage electricity production in flat regions. Water from an underground reservoir is pumped to a surface reservoir to store electricity in the form of potential energy. Later, water is discharged through turbines into the underground reservoir to produce electricity when demand increases. During this operation, the water hydrochemistry continuously evolves. It varies in order to reach chemical equilibrium with the atmosphere (in the surface reservoir) and with the surrounding porous medium and groundwater (in the underground reservoir). The hydrochemical variations may lead to reactions in the reservoirs and in the surrounding porous medium, causing potentially negative consequences for the environment and the system efficiency, especially when pyrite is present in the surrounding porous medium. In this case, pyrite oxidation leads to a decrease in pH and the precipitation of goethite or schwertmannite in the surface reservoir. The decrease in pH is mitigated when calcite is present in the porous medium. However, other concerns may arise, such as slight increases in pH, the precipitation of ferrihydrite and calcite in the surface reservoir, and the oxidation of pyrite and dissolution of calcite in the surrounding porous medium. Understanding the pH variations and the precipitation/dissolution of minerals is of paramount importance in terms of the environmental impacts and system efficiency. For this reason, with numerical modelling, this work investigates the main hydrochemical changes and their associated consequences when abandoned deep mines are used for UPSH. The main objective is to highlight the importance of considering hydrochemical aspects when designing future UPSH plants.

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Section: Introductionmentioning

confidence: 99%

Hydrochemical changes induced by underground pumped storage hydropower and their associated impacts

Pujades

Jurado

Orban

et al. 2018

Journal of Hydrology

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Verockerung wasserbaulicher Filteranlagen: Stand der Wissenschaft und notwendige Untersuchungen

Tophoff¹,

Kreyenschulte

Schüttrumpf

et al. 2022

Grundwasser - Zeitschrift der Fachsektion Hydrogeologie

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ZusammenfassungIn den letzten Jahrzehnten kam es in Einzelfällen zu schweren Schäden an wasserbaulichen geotextilen Filteranlagen infolge der Verstopfung durch ausgeflockte ockerhaltige Produkte. Durch eine starke Verminderung der Durchlässigkeit der Geokunststoffe in Kombination mit einem hohen hydrostatischen Druck wurden unter anderem die Deckschichten verschiedener Deckwerke in den tidebeeinflussten Wasserstraßen Ems und Weser angehoben und beschädigt. Bisher wurden die Milieubedingungen, d. h. Grundwasser- und Oberflächenwasserbeschaffenheit sowie Aquifer- und Deckwerksmaterial, unter denen die Ockerbildung in geotextilen und mineralischen Filteranlagen auftritt, noch nicht systematisch untersucht. Im Rahmen des vorliegenden Beitrags werden im ersten Schritt aus theoretischen Untersuchungen und Datenanalysen von Grundwasser- und Oberflächenwasseruntersuchungen Kriterien zur Bewertung der Verockerungsneigung abgeleitet. Diese Kriterien bzw. DOCP (decisive ochre clogging parameters) zeigen in den Ästuaren Ems, Weser und Elbe Beträge an, die Verockerungserscheinungen begünstigen bzw. ermöglichen. Auf Basis dieser Untersuchungen werden im zweiten Schritt Randbedingungen für zukünftige systematische In-situ-Untersuchungen an wasserbaulichen Filteranlagen sowie im experimentellen Modell abgeleitet.

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Influence of drainage blanket clogging on response of homogeneous earthen dams

Dey

Talukdar

2022

Sādhanā

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Problem of Clogging in Drainage Systems in the Examples of the Żur and Podgaje Dams

Cited by 6 publications

References 1 publication

Hydrochemical changes induced by underground pumped storage hydropower and their associated impacts

Hydrochemical changes induced by underground pumped storage hydropower and their associated impacts

Verockerung wasserbaulicher Filteranlagen: Stand der Wissenschaft und notwendige Untersuchungen

Influence of drainage blanket clogging on response of homogeneous earthen dams

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