The Aggitis karst system, Eastern Macedonia, Greece: Hydrologic functioning and development of the karst structure

Novel, J. P.; Dimadi, Agoro; Zervopoulou, Anna; Bakalowicz, Michel

doi:10.1016/j.jhydrol.2006.10.029

Cited by 22 publications

(6 citation statements)

References 8 publications

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“…It was also found that the very good drainage of the aquifers corresponds to a developed karst system. (c) The karst system hosted in the marbles of Aggitis presented similar results regarding the autocorrelation and cross-correlation functions, and thus similar characteristics with the above-mentioned systems [13]. The lag time of 50 days for the autocorrelation function was attributed to the system's long memory, corresponding to an increased storage, which could explain the huge water reserves that were calculated by the recharge area of the springs.…”

Section: The Role and Presence Of The Epikarstic Zone In General Andsupporting

confidence: 56%

“…The most well-known studies focus on the central Peloponnese and Western Greece, where the carbonate formations of the Ionian, Gavrovo-Tripolis, and Olonos-Pindos zones are mainly developed. Additionally, individual studies provide important information for other areas, for example [8] for the Pre-Apulian zone, [9,10] for the Parnassos-Giona zone, [11] for the Pelagonian and Attico-Cycladic zones, [12] for the Koziakas Mountain, [13] for the crystalline limestones of the Rhodope massif, and others [14].…”

Section: The Hellenic Karstmentioning

confidence: 99%

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Hellenic Karst Aquifers Vulnerability Approach Using Factor Analysis: The Example of the Louros Karst Aquifers

Κατσάνου

2018

Geosciences

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The karst aquifers of the Hellenic territory display high vulnerability that is related to the existence of the epikarst zone. If present, the epikarst zone regulates the vertical movement of the groundwater, which results in the chemical pollutants staying longer within it, thus facilitating the inactivation of the microbial loads. The Hellenic karst is well developed; it displays high hydraulic conductivity, relatively large storage, and the characteristics of an important water reservoir. Although its porosity was calculated to be between 0.005-8%, the statistical processing of the springs' discharge time series points to an increased storage. The increased storage was attributed to the presence of the epikarst zone, which regulates the water movement to the underlying formations, and finally to its discharge from the karst system through springs. In these areas, the influence of nitrogen compounds on the water quality is evident. The presence of cyanobacteria and toxic substances at concentrations that are too high for fresh, flowing waters whose temperature does not exceed 17 • C advocates the role of nutrients, even at concentrations that do not exceed the maximum permissible limits of drinking water. In mountainous areas, where agriculture is limited, the presence of these compounds is attributed to heavily polluting land uses. The impact of such uses became apparent from the application of factor analysis, which not only highlighted their contribution to the overall groundwater quality, but also determined their geographical distribution and origin. From the above, it becomes evident that there is a need for protection of the karst aquifers, and investigation of their vulnerability mechanisms. The Hellenic karst, which is expected to cover the drinking water needs in the near future, proves to be very vulnerable to any kind of pollution.

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Section: The Role and Presence Of The Epikarstic Zone In General Andsupporting

confidence: 56%

Section: The Hellenic Karstmentioning

confidence: 99%

Hellenic Karst Aquifers Vulnerability Approach Using Factor Analysis: The Example of the Louros Karst Aquifers

Κατσάνου

2018

Geosciences

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“…Long‐term isolation is also supported by the occurrence of the endemic fish Cobitis punctilineata Economidis & Nalbant and the endemic lamprey Eudontomyzon hellenicus Vladykov, Renaud, Kott & Economidis in the Aggitis River. The Aggitis Spring is part of a well developed and complex karst network, which has existed at least since Pliocene (Novel et al , 2007) and is characterized by constant conditions that seem to have supported fish populations long enough to develop a pronounced divergence from other populations.…”

Section: Discussionmentioning

confidence: 99%

Molecular phylogeographic analyses of the loach Oxynoemacheilus bureschi reveal post‐glacial range extensions across the Balkans

Šedivá¹,

Apostolou²,

Kohout³

et al. 2010

Journal of Fish Biology

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Rivers on the Balkan Peninsula can be separated into ichthyofaunistic areas with different endemic fish species. The Vardar River contains a particularly large number of endemics, indicating its complete and long-term isolation from neighbouring river systems. One of the few species shared with other rivers is the loach species Oxynoemacheilus bureschi. In this study, the genetic analyses of 175 individuals of O. bureschi from 17 sites, covering the entire distribution of the species, including the Rivers Vardar (= Axios), Struma (= Strymon), Mesta (= Nestos) and Danube, were performed using one mitochondrial and one nuclear marker. Genetic differentiation among populations was in general low. Shared haplotypes were common and occurred even between distant localities and different river systems. This points to a high degree of gene flow among populations and rejects the hypothesis that the population in the Vardar River represents a relict from an early colonization of the Balkan Peninsula. In contrast, the results suggest that populations in the Vardar River, as well as those in the Danube River, are of recent origin, and a human-mediated introduction cannot be excluded. On the other hand, the populations in the Aggitis River, a left tributary of the lower Struma River, were clearly separated from the rest of the species and represent a long-term isolated lineage. Demographic analyses suggest a recent population expansion for O. bureschi, in which the population in the Aggitis River was not involved.

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“…During the last decades, The river flow is generated by water inputs of an extensive underground karst system, and flows as an underground river at Aggitis (or Maara) Cave [45]. The Aggitis springs are located at the outlet of the cave [46]. The river crosses the plain of Drama Prefecture along with other major streams, then flows through a small gorge "Aggitis Gorge" near Alistrati Cave, and finally contributes to Strymonas River which ends in Strymonikos Gulf in the North Aegean Sea [47,48].…”

Section: Introductionmentioning

confidence: 99%

UAVs for Hydrologic Scopes: Application of a Low-Cost UAV to Estimate Surface Water Velocity by Using Three Different Image-Based Methods

Koutalakis

Tzoraki

Zaimes

2019

Drones

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Stream velocity and flow are very important parameters that must be measured accurately to develop effective water resource management plans. There are various methods and tools to measure the velocity but, nowadays, image-based methods are a promising alternative that does not require physical contact with the water body. The current study describes the application of a low cost unmanned aerial vehicle that was selected in order to capture a video over a specific reach of Aggitis River in Greece. The captured frames were analyzed by three different software (PIVlab, PTVlab, and KU-STIV) in order to estimate accurately the surface water velocity. These three software also represent three different image-based methodologies. Although there are differences among these three methods, the analysis produced similar trends for all. The velocity ranged between 0.02 and 3.98 m/s for PIVlab, 0.12 and 3.44 m/s for PTVlab, and 0.04 and 3.99 m/s for KU-STIV software. There were parts, especially in the existing vegetation, where differences were observed. Further applications will be examined in the same or different reaches, to study the parameters affecting the analysis. Finally, the image-based methods will be coupled with verification measurements by a current meter to produce more rigorous results.

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The Aggitis karst system, Eastern Macedonia, Greece: Hydrologic functioning and development of the karst structure

Cited by 22 publications

References 8 publications

Hellenic Karst Aquifers Vulnerability Approach Using Factor Analysis: The Example of the Louros Karst Aquifers

Hellenic Karst Aquifers Vulnerability Approach Using Factor Analysis: The Example of the Louros Karst Aquifers

Molecular phylogeographic analyses of the loach Oxynoemacheilus bureschi reveal post‐glacial range extensions across the Balkans

UAVs for Hydrologic Scopes: Application of a Low-Cost UAV to Estimate Surface Water Velocity by Using Three Different Image-Based Methods

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