Hidrológiai Közlöny 1949 (29. évfolyam)

9-10. szám - Értekezések - J. BOGÁRDI, D. Eng.: Report on the Ground Water Conditions of the Great Hungarian Plain

Fig. 9. áibna. Hj/droisohipsas of ootober HtS. 1943. évi <yk.tóber haivi faidraizoJiijiszák. ved. Superficially followinS the line of the water divide between the two great rivers, the" Danube and the Tisza, the highest Une of the water table runs from north to south, ánd is sloping to the rieht and left. to the Danube and the Tisza respectivly. In this loeation the slope is frepuently 20 to 25 %». The slooe appears somewhat less in the region of Nyíregyháza (15 to 20%n), which, however, decreascs in the southwestern direction towards the Tisza so that in the heart of the trans-Tisza region the slope of the. ground water table is 1.5 to 2.5%o-only. At somé singular wells we ha ve a!so indicatéd by numbers the stage of the ground water above the Adria. Below the numerals we have indicatéd with italics at the same Avells the elevation of the ground levél. Figure 9 shows the hydroisohipsas compiled on the hasis of the_mean stages of October 1943The fali mounth of this arid hot year shows ext reme 1 yJ(nv stages. It it of the ground pheno

: menőn that the sloping of the ground water and the direction of streaming of this low stage is similar to the conditions apparent in -the high ground water as stated in figure 8. The skjpes are somewhat less than at high stages but there can be found alsó here as in the region between the Danube and the Tisza and in the region of Nyíregyháza in the transTisza district slopes of 23%

0. In the trough of the trans-Tisza district, however. slopes of less than l%o may be found also. On a few singular locations of figure 9 we have especially marked also the ground water table and the local ground level above the Adria. The exhibited hydroisopsas were made on the basis of the respective wells, after the necessary interpolations were finished and they characterize in generál only in their main feature the ground water conditions of the Alföld. There might occur differences of somé local importance but nevertheless we assume that these maps are most dependable among those which have been published so far for the information on ground water conditions: on the basis of a well network of this extent no hydroisopsas were published before about this region. .282