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Vipava river basin, Slovenia

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Vipava River Basin is located in the south-west of Slovenia and is part of Soča river basin area. It covers an area of 598 km2 and a population of 52,000 inhabitants.

In contrast to its karst region surroundings, most of the Vipava River Basin region has an impervious flysch sedimentary rock base. The main water body is the Vipava River which is 45 km long and has a mean annual flow of 17.3 m3/s. The water level of the Vipava River varies significantly due to karst surface tributaries. Before river regulations were introduced in the 1970s, floods were very common in Vipava valley. The climate of the region is Mediterranean, with mild winters and hot summers.

The River Basin has a complete monitoring network, with 8 main meteorological stations within the area of influence of the basin (data series between 20 and 62 years) and 6 gauging stations on the Vipava River (data series between 10 and 72 years) and 6 gauging stations on its tributaries (data series between 10 and 70 years). Land cover has been monitored from 1993 and water consumption data for the region are available from 2002. Data on socio-economic indicators are available at Statistical Office of the Republic of Slovenia.

Vipava society

CSRB Challenges

  • Morphological changes of riverbanks, wetlands and coastal zone
  • Industrial pollution
  • Water flow regulation and abstraction
  • Diffuse pollution caused by agriculture
  • Invasive species