Vízügyi Közlemények, 1973 (55. évfolyam)
4. füzet - Rövidebb közlemények és beszámolók
storage, impoundment storage in the flood plain and in the channel and by importing water from the Danube River. The introduction of channel impoundment as a storage method may be regarded as a novelty. Part of the water masses transported at the end of flood waves is retained and used for meeting water demands in the summer (Fig. 1.3 — 2). The variations in the costs per 1 cu.m storage space are indicated in (Fig. 1.3—3). Based on conceptions suggested round 100 years ago the plans for the complete canalization of the Hungarian reach of the Tisza River were evolved in the 1950ies. According to the alternative eventually approved downstream of Tiszalök barrages are envisaged at Kisköre and at Csongrád, the latter connecting to the backwater created by the Novi-Betshey Barrage in Yugoslavia. In locating the barrage sites, beside irrigation, allowance was made for the requirements of navigation, with the objective of creating a European IV.th category waterway capable of accommodating 1350 ton vessels, as well as for establishing balanced sediment and ice-run regimes. (The sediment load in the Tisza River is 9 and 22 million tonnes annually at Tiszalök and Szeged, respectively, most of which consists of suspended sediment. Bed load transport, on the other hand, is insignificant. During the first 7 years after the inauguration of the Tiszalök Barrage round 5 million cu.m of sediment were deposited before the bed was stabilized.) The discharges conveyed in the mid-1960ies, a critical phase of development of agricultural production as well as those to be expected in a more distant future are illustrated in Fig. 1.3 — 6. The canal systems fed from the reservoirs above the barrages will bring about fundamentaal changes in water distribution over the area affected. 267
