Vízügyi Közlemények, 1966 (48. évfolyam)
4. füzet - Rövidebb közlemények és beszámolók
(14) piled for standard discharges in Table VI, while design criteria for asbestos cement laterals are given in Tables VII a, b and c. Design computations for headers and corresponding laterals can be performed in tabulated form, as demonstrated in Table VIII. Layout plans of actual design solutions are illustrated in Figs. 11 to 15. The method proved successful in practice. BRIEF 1 PUBLICATIONS AND REPORTS 1. Papfalvy, F.: Soil mechanical laboratories in hydraulic engineering. (For the Hungarian text see pp. 119) For providing answers to soil mechanical problems encountered in hydraulic engineering pracice, a laboratory serving research projects was established at the Research Institute for Water Resources Development, regional laboratories were organized at three District Water Authorities, and one serving education purposes was created at the Hydraulic Technical High-School at Baja. Generally accepted examinations and tests, such as those for natural water content, grain-size distribution, consistency limits, specific gravity, porosity and pore volume, uni-axial compressive strength, compressibility and slump, angle of internal friction and cohesion, density and compaction properties, permeability, capillary rise, linear shrinkage and ignition loss can be determined there by standard methods. Laboratories have been equipped with modified, or newly designed oedometer equipment, oedometer cells, tri-axial cells, permeability meters, mercury volumemeters, meter for measuring maximum molecular water capacitv, illustrated in Figs. 1 to 7. 2. Perényi, К., Engr.; Irrigation in Iraq. (For the Hungarian text see pp. 124) In Iraq an area of 58,000 sq.km is under cultivation, over the greater part of which— 3,672,000 hectares —production is ensured by irrigation. The most valuable agricultural lands of the country lie in the low lands between the Tigris and Euphrate Rivers and east from the Euphrate River. Most of the sparse precipitation occurs in winter. Sites of barrages and irrigation systems existing, under construction, in the designing stage, or being contemplated are shown in Fig. 1. On the Euphrate River barrages have been built at Ramadi and Hiniya (Fig. 2). Several additional high dams are planned on the Euphrate River, while several reservoirs have already been built in the catchment of the Tigris River, among them the Dokan Dam and the Samarra Barrage. Plans for the development of irrigation, together with major irrigation projects are illustrated in Fig. 3. 3. Polgár, Gy., Engr.: Surface runoff and sun-spot activity. (For the Hungarian text see pp. 130) A study of sun-spot activity over the past 100 years revealed a certain periodicity, which showed a fair coincidence with the occurrence of wet and dry years. The relationship between the two phenomena is illustrated in Fig. 1, from which a forecast can be given by extrapolating periodicity for probable wet years.
