Vízügyi Közlemények, Kivonatok, 1965

Dégen Imre: Az 1965. évi dunai árvíz és árvízvédelmünk fejlődése

(43) levees the safety freeboard related to design flood stages is far from uniform, the levees are defective in places and are built to different standards. A general description of the entire reach is given together with the main particulars of individual levee sections, in Chapter 1. Over the section above Bud,apest several smaller catchment basins are protected by levees and the same applies to the right-hand side belmc Budapest. On the left-hand side, below Budapest the levees form a continuous line, which is bounded at its southern end by a short high bluff at the height of Dunaföldvár. In Chapter 2 on flood hydrology, flood stages have been compiled in Table I. Over the reach above Budapest flood stages exceeded the highest ice-free flood on record, namely the 1954 flood, by 36 up to 62 centimetres, and in fact even the design flood stage, which was determined by ice-run flood stages, so that extensive control measures became necessary here. On the other hand, over the reach below Budapest, down to Dunaföldvár, the levees are built for a design stage determined by ice-run floods, which is higher by 114 to 200 cm than the highest ice-free flood, and in consequence active flood control was found necessary on a very small scale only. In Chapter 3 an account of active flood control measures is given. Operations over the levees belonging under the control of the Central Danube Valley District Water Authority started on the 27th March and were continued to the 12th June. Operations are described according to individual control sections and special attention is devoted to the protection of the capital Budapest itself. Deficiencies of individual control sections are indicated in detail, together with the hazards resulting therefrom and major operations initiated to prevent consequent disasters. In Chapter 4 labour, equipment, material and costs of control operations are compiled. Experiences gained during the flood over the reach are listed in Chapter 4, grouped according ot hydraulic, technical and organizational aspects. 3.4 FLOOD CONTROL OVER THE CENTRAL-TRANSDANUVIAN DANUBE REACH By K. Karászi — I. Philipp — dr. I. Zsuffa, Civ. Engrs. (For the Hungarian text see pp. 202) Flood control responsibilites of the Central-Trcnsdanuvian District Water Authority extend between river stations 1613 and 1465 kms on the right-hand side of the Danube. The levees along the Danube are 148 km and along the tributaries 102 km long. An area of 49.300 hectares is protected.