Matrix hydrogeological properties of Devonian carbonate rocks of Olkusz (Southern Poland)

Motyka, Jacek; Pulido−Bosch, A.; Borczak, S.; Gisbert, J.

doi:10.1016/s0022-1694(98)00229-7

Cited by 18 publications

(20 citation statements)

References 9 publications

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“…, rock type (Pulido-Bosch et al 2004, Motyka et al 1998) and type of porosity (Zuber and Motyka, 1994). For instance, hydraulic conductivity of one aquifer has been determined to increase by as much as six orders of magnitude with increases in the volume of rock tested (Ewers 2006, White 2006.…”

mentioning

confidence: 99%

“…The anisotropy and heterogeneous nature of karst aquifers is due to three types of water flow; 1) matrix flow; 2) fracture flow; and 3) conduit flow (Motyka 1998, Worthington et al 2000. Matrix flow moves through intergranular (primary) pores, macrofissures and microcaverns (Motyka 1998) and is often characterized by Darcian flow.…”

mentioning

confidence: 99%

“…Matrix flow moves through intergranular (primary) pores, macrofissures and microcaverns (Motyka 1998) and is often characterized by Darcian flow. Fracture flow occurs in apertures of 50 to 500 µm, but may be enlarged by dissolution up to 1 cm (White 2002).…”

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confidence: 99%

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Identification of a hydrodynamic threshold in karst rocks from the Biscayne Aquifer, south Florida, USA

2007

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Identification of a hydrodynamic threshold in karst rocks from the Biscayne Aquifer, south Florida, USA

2007

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“…Vrednosti koeficienta prepustnosti matriksa pri analizi prenosa snovi v kra{ko-razpoklinskih vodonosnikih vselej niso zanemarljive, saj se npr. interpretacija sledilnih poizkusov bistveno razlikuje, ~e vanjo vklju~imo tudi lastnosti matriksa (MOTYKA et al, 1998). Po razvrstitvi podatkov v starostno-litolo{ke skupine (sl.…”

Section: Koeficienti Prepustnosti Razpok In Matriksaunclassified

“…-3 m -1 ) se z vrednostmi za dolomite izredno dobro ujemajo v raziskavi, namenjeni hidrogeolo{kim lastnostim matriksa v karbonatnih kamninah (MOTYKA et al, 1998), v kateri so dolo~ili geometri~no povpre~je Ss M = 1,3*10 -3 m -1 . V nadaljevanju so bili podobno kot za koeficiente prepustnosti dolo~eni tudi koeficiente specifi~nega elasti~nega uskladi{~enja lo~eno za razpoke in matriks, glede na starostno-litolo{ke skupine (sl.…”

Section: Koeficient Specifi~nega Elasti~nega Uskladi{~enjaunclassified

Hydraulic conductivities of fractures and matrix in Slovenian carbonate aquifers

Verbovšek¹

2008

Geologija

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Izvle~ekV prispevku so s fraktalno Barkerjevo metodo analize ~rpalnih poizkusov dolo~ene vrednosti koeficientov prepustnosti in koeficientov elasti~nega uskladi{~enja tako za razpoke in za matriks v slovenskih karbonatnih vodonosnikih, predvsem v dolomitih. Vrednosti so podane za dolomite in apnence skupaj, kot tudi za posamezne vodonosnike, lo~ene po starostih kamnin in po litolo{kih zna~ilnostih. Podatki so zbrani iz poro~il o 397-ih vrtinah in vodnjakih, z omenjeno metodo pa je reinterpretiranih 79 ~rpalnih poizkusov. Koeficienti prepustnosti razpok so bistveno vi{ji od koeficientov prepustnosti matriksa, statisti~ne razlike med njimi pa so visoko zna~ilne. Podobno so zna~ilne tudi razlike med koeficienti elasti~nega uskladi{~enja v razpokah in v matriksu, pri ~emer so vrednosti v slednjem ve~je. Vrednosti vseh koeficientov se razlikujejo v posameznih vodonosnikih, razlike pa se da razložiti z diagenetskimi zna~ilnostmi, velikostjo zrn, stopnjo razpokanosti in ~istostjo kamnin. Primerjava med metodami, uporabljenimi v poro~ilih, in Barkerjevo metodo, kaže, da se podatki bolje prilegajo slednji metodi, ki je za kra{ko-razpoklinski tip kamnin tudi bolj ustrezna. AbstractHydraulic conductivities and specific storage coefficients of fractures and matrix in Slovenian carbonate aquifers were determined by Barker's method for pumping test analysis, based on fractional flow dimension. Values are presented for limestones and mainly for dolomites, and additionally for separate aquifers, divided by age and lithology in several groups. Data was obtained from hydrogeological reports for 397 water wells, and among these, 79 pumping tests were reinterpreted. Hydraulic conductivities of fractures are higher than the hydraulic conductivities of matrix, and the differences are highly statistically significant. Likewise, differences are significant for specific storage, and the values of these coefficients are higher in the matrix. Values of all coefficients vary in separate aquifers, and the differences can be explained by diagenetic effects, crystal size, degree of fracturing, and carbonate purity. Comparison of the methods, used in the reports, and the Barker's method (being more suitable for karstic and fractured aquifers), shows that the latter fits real data better. UvodV Sloveniji je delež odvzema podzemne vode proti razpoložljivi koli~ini v vodnih telesih podzemne vode s prevladujo~imi vodonosniki kra{kega, razpoklinskega in me{anega tipa poroznosti {e vedno majhen (povpre~no 12 %; ANDJELOV et al., 2006). Kljub dokaj majhnem deležu postajajo ti vodonosniki ~edalje pomembnej{i vir pitne vode. V primerjavi z medzrnskimi so {e vedno manj raziskani, predvsem zaradi svoje heterogenosti in posledi~no zahtevnej{ih analiz, zato je o njih znanih manj podatkov, med katere npr. sodijo podatki o prepustnosti oz. izdatnosti. V Sloveniji se veliko raziskovalcev ukvarja z razli~nimi lastnostmi karbonatnih kamnin, toda sistemati-~n ih analiz parametrov in predvsem analiz, ki bi povezovale vrednosti parametrov z dejanskimi lastnostmi ka...

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Delayed Poroelastic Triggering of the 2016 October Visso Earthquake by the August Amatrice Earthquake, Italy

Tung

Masterlark

2018

Geophysical Research Letters

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Two months after the 2016 Amatrice earthquake (AE), a strong (~M6) earthquake (Visso earthquake, VE) struck the town Visso, Italy, 20 km north of the AE epicenter. Between these two events, the aftershocks migrated gradually toward to the VE epicenter at a rate of ~0.4 km/d, indicating propagation of pore pressure front. We use finite element models to simulate the postseismic fully coupled poroelastic response. The results show that the pore fluid flows (up to 50 nm/s) both horizontally and vertically into the VE hypocenter since the AE and destabilized the area with extra ~70% of Coulomb failure stress. Majority of nearby aftershocks (>80%) tend to cluster within the zones of coseismic depressurization where fluid flow converges. A maximum ΔCFS of ~35 kPa is calculated at the VE hypocenter during its rupture by a crustal permeability, 10–16 ± 0.7 m2, suggesting that an intermediately fractured crust allows maximum rupture tendency for the VE during poroelastic fluid recovery.

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Matrix hydrogeological properties of Devonian carbonate rocks of Olkusz (Southern Poland)

Cited by 18 publications

References 9 publications

Identification of a hydrodynamic threshold in karst rocks from the Biscayne Aquifer, south Florida, USA

Identification of a hydrodynamic threshold in karst rocks from the Biscayne Aquifer, south Florida, USA

Hydraulic conductivities of fractures and matrix in Slovenian carbonate aquifers

Delayed Poroelastic Triggering of the 2016 October Visso Earthquake by the August Amatrice Earthquake, Italy

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