Vízügyi Közlemények, 1936 (18. évfolyam)

Kivonatok, mellékletek - Kivonat a 2. számhoz

VIII. to be carried down was computed from the 60% of a 40 mm rain falling during an hour, which on the watershed of 32 sq. km resulted in 9'6 m

3/sec. In the lower two third stretch of the gully five smaller dams of 1'40— -1/70 m height, and in the upper stretch of greater slope eight higher dams of 4'5

—8'0 m height were constructed. The dams were built of quarry stone laid in Portland cement concrete, and were computed as retaining walls with earth pressure, into which the height of the overflowing water was also converted. The earth taken out of the foundation pits was placed behind the dams, and drains were provided for carrying away the water thence. The length of the pool at the toe is 80% of the height of the dam. In order to avoid cracks caused by unequal settlement, the apron and the body of the dam were built separately. The dams are let into the side banks to a depth of l'O m. Below the gully the water flows on an alluvial cone of Г5 km length ; where the slope is large, the channel is revetted with stone laid in concrete (f

;g. 6). Farther below the earth bed has no revetment. The works were carried out by the hydraulic engineering office at Győr from April to November 1935. It may be mentioned that during the work large earth masses fell off the steep banks of loess, which caused much trouble. Every day, before beginning work, the loosened earth blocks were knocked down by men let down on ropes from the edge of the gully. The masonry, consisting of quarry stone laid in concrete, cost 27'50 pengő per cu. metre, and the revetment 4*4 pengő per sq. metre. The total costs were as follows : Masonry works of 13 dams, 1316 m

3 à 27'50 P 36,200 P Earthwork and planing 4,300 ,, Channel excavation and revetment (3828 m

2) 19,000 ,, 6 bridges 12,200 ,, Additional works 800 ,, Total 72,500 P The gully stabilisation itself cost 40,500 P (the sum of the two first items), of which 31 P falls to 1 cu. metre of dam. 93% of the costs was granted by the State, and 44-4% of the total sum was paid out as wages. V. RATIONAL WATER SUPPLY OE CITIES. By GY. ANDOR. (Pages 197—215.) In Hungary the chief difficulty of supplying communities with water is want of money. According to approximate estimates, within an appreciable time, another 1"5 million persons will have to be supplied with drinking water. Considering the present level of wages, the price of materials, and the fact that most of this country is flat land — where water for towns is more expensive than in mountainous districts — the supply (including house connections and water meters) would cost 70—90 pengő per capita, which would amount to 110—130 million pengő for 15 million persons. Such large sums being involved, we have to try to find economical solutions.