Az Egri Ho Si Minh Tanárképző Főiskola Tud. Közleményei. 1979. (Acta Academiae Paedagogicae Agriensis : Nova series ; Tom. 15)

III. TANULMÁNYOK A TERMÉSZETTUDOMÁNYOK KÖRÉBŐL - Dr. Tóth Géza: A Központi-Bükk karsztvízmérlege

Kessler H. 1953. A lillafüredi Anna-barlang forrásai. Hidr. Közi. 33. p. 60-65. Kessler H. 1954. A karsztból tartósan kitermelhető' vízmennyiség és a beszivárgási százalék megállapítása. Hidr. Közi. 33. p. 60-65. Lécfalvy S. 1970. A Szinva-forrás foglalása Miskolc részére. Vízügyi Közi. 1. p. 41-70. Pávay Vajna F. 1950. „A karsztvíz és a Karsztvíztérképek". Hidr. Közi. XI., XII. 402-405. Sárváry I. 1969. A Létrás-istvánlápai barlangrendszer. Karszt és barlang 2. p. 53-55. Szlabóczky P. 1972. Csipkéskúti karsztvízösszefüggés-vizsgálat. Karszthidrológiai térkép (kézirat) Tóth G. 1973. Adatok a nyugati Bükk karszthidrológiájához. Földr. Ért. 2-3. p. 277-286. Tóth G. 1974. Karsztvíz összefüggés-vizsgálatok a Nyugat-Bükk területén. Acta Acad. Agriensis 12. p. 503-511. Tóth G. 1976. A Központi Bükk karsztvíztérképe Hidr. Közi. 10. p. 445-449. VITUKI Vízhozammérési adatok 1950-1975. Jelmagyarázat Sz.Sz. = Szilvásváradi Szikla-forrás M = Margit-forrás S = Soltész-kerti forrás Id. = Idó'szakos karsztforrás THE KARSTIC-WATER BALANCE OF THE CENTRAL-BÜKK MOUNTAIN TÓTH, G. A bstract The Central-Bükk area is the highest central part,or the Bükk Mountain the boundary of which can be easily determined. The formations of the area, which are very various in age and in development and are karstic, are bordered from the north by palesooic nonpermeable rocks. The karstic springs emerging on this line ensure an unambiguous karstic erosion-basis for the karstic water system of the Bükk Mountain. In the line of the Garadna and Szinva valleys, the border of the hydrographic system is hown by the spring series in the deep out valleys. Towards SE the central karst region contacts the karstic water region in the SE, on the SW it becomes a confined karst region covered by argillaceous slate. In spite of the fact, that this area of 100 km

2s is, in some places at the borders, hydrogeologically open, it can be considered from the point of view of karstic water geology as an independent unit. The data, which are needed for the approximate numerical evaluation of the karstic water system of the Central-Bükk Mountain, and to set up the karstic water balance, are available. The area's 25 karstic springs are characterized by data gauged with different frequency. Because of this fact the evaluation was carried out on the basis of the averages. In accordance the precipitation data were also used as averages. The average precipitation of the 100 km

2 s area of the Central Bükk Mountain is 788 mms according to the data of 10 gauging stations. The data of the stations are the averages of 10-60 years or primary data. The annual average evaporation of the area is about 500 mms. From these data the calculated average infiltration is 36,5%. According to the very haterogeneous precipitation data in the Central Bükk Mountain the infiltrating rate was differentiated between 32-40%. The basic data of karstic water balance in the Central Bükk Mountain are the following: a) The annual average precipitation of the catchment of 100 km

2s is 78,810

6 m

3 b) Considering an average evaporation of 500 mms/year the evaporation loss of the area is 50.10

6 m

3

. c) Considering an average infiltration of 36,5% on the area the yearly recharge is 28,8.10

6 m

3

. d) The annual average discharge of the springs in the area is 26.10

6 m

3

. According to the calculations one tenth of the whole karstic water flow, 2,8 10

6 m

3 leaves the area as deep karstic water. The average data for the are in 1Ü

6 m

3 (year) 100 km

2

. Precipitation - Evaporation = Discharge of Springs + Deep karstic flow. 78,8 - 50,0 = 26,0 + 2,8 28,8 = 28,8 Karstic water input = Karstic water output The karstic water balance shows equality in the Central Bükk Mountain. 487