Vízügyi Közlemények, 1970 (52. évfolyam)

4. füzet - Rövidebb közlemények és beszámolók

(92) These investigations have demonstrated the potential applications of resistance strain gages and structural models in hydraulic engineering. 5. Bácsi, E. and Sulijok-Schulek, В., Civ. Engrs.: A novel type of subsoil irrigation (For the Hungarian text see pp. 521) The history and development of subsoil irrigation is described in Chapter 1. Drawing the conclusions therefrom and on the basis of experiments a method of subsoil irrigation is recommended in Chapter 2, where subsoil irrigation of large areas is made possible by dividing them into small elementary units. The division of an area into elementary units is shown in Fig. 4, where the area of individual elementary units is 40 to 80 sq-m, corresponding to a spacing of circle centers of 7 to 10 m. The main part of the equipment is the automatic water distributor ( Fig. 5 ), the side-wall of which is permeable. Water from the vessel flows under moderate pressure through the permeable wall into the soil, and penetrates to a certain distance by the suction effect of the soil. Distributors are fed with water through a common header controlled by an automatic, float controlled valve. The distributor is covered by a 40 cm thick earth layer. This method of irrigation is claimed to be suitable for combination with the conventional porous pipe system ( Fig. 6), in which case the permeable pipes, rather than the distributor vessel ensure the wetting of the surrounding soil.