Hidrológiai Közlöny 1971 (51. évfolyam)

1. szám - Dr. Öllős Géza: A kutak vízhozamát befolyásoló tényezők

Special Conference Number, Szebellédy, L. Hidrológiai Közlöny 1971. 1. sz. 19 Fig. 4. Well No. 1 of the Mezőcsát Waterworlcs and the relevant yield data 0 200 400 600 800 0 -\ a[i/p] H[m] Filter surfacesConstrucfeú A c tive corrosion ) may occur if aggressive water is pumped. Corroding pipes may increase eonsiderably the dissolved iron content of water and thus water of lower than natural quality is produced from the well. Though, at high rates of pumping the dissolved iron content may drop nearly to the originál value in the layer, it may increase again expecially in case of outages. The paper of S. Karácsonyi gives a good example concerning such a case. Well No. 1., of the Mezőcsát water-works was built in 1966. However, normál operation was started in 1969 only. As the well was out of operation during the time of investigation, the yield (Fig. 4) decreased, whereas the iron content (Fig. 5) increased. From these experiences S. Karácsonyi arrived at the following conclusions: — besides local corrosion, the water quality alsó suffers unfavourable changes, -3,00 "V ^ Originál Stotionary water level -5,20 í 7i; 16 15 MES 8 7 6 16 15 1413 7 6 5 15 ti 13 Deep est drawdown 14 I % i I \A

2 3 10 H 1 2 3 • • • 9 10 11 I 2 3 • • • 9 10 11 10 -S7*0

/00 - Exploration shaft zlM A A7-W 3Z'Ál

0 B C -X7-5,

50 D Fig. 6. Sampling spots in the vicinity of the well under investigation (7777. 114,40 m 119, OOm MOOm 125,OOm y////y ////// 133,00m 0203/192mm 146,10m 149,OOm 156,OOm 163,00m 7777/ iH26/414mm^ 18,50m \ M8/302mm S5,80m y 4241/228mm 100 200 300 ltOO 500 Yield, H [l/s] Fig. 5. Iron content of the pumped water