engleski

The throughput of the drainage-retaining channel Botonega in Istria, Croatia

The drainage-retaining Botonega Channel represents one of the most significant water-managing facilities of the Istrian peninsula. The Botonega Channel original purpose was the protection against high waters from the Botonega accumulation as well as external waters of streams Zamask, Zigante, Senica, Matisko and St. Cirijak streams. The Channel is closely related to the overall water flow regime and throughput of the lower and central Mirna River basin. The Channel’s main purpose today is the irrigation of the Mirna River downstream areas. The appearances of high waters in the last two decades have caused major hydrological problems in wider catchment area of the Mirna River. The Botonega accumulation and the Botonega evacuation channel played a very important role in reducing large water waves, particularly in the central and lower part of the Mirna River basin. Basic characteristics of the throughput capacity of the drainage-retaining Botonega Channel in winter and summer time are shown in this paper as well as are the significant appearances of its deformability during last ten years. Measures and criteria for the throughput capacity increase of the channel and decrease of its erosive activity are also presented.

the Botonega Channel ; throughput ; erosion ; vegetation ; irrigation ; rehabilitation measures

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