Abstract
The Krka River and its tributaries make the system of composite valleys in the karst. The composite valley system is the result of lithologic and tectonic relations. The Krka valley is of polygenetic origin. In the canyon sections there are many characteristic slope relief details. On steeper slopes crumbling and collapsing is significant. The debris of surrounding rocks is found in alluvial deposits at the valley widening. In recent times, the regeneration of vegetation is noticeable, which contributes to decreasing intensity of relief shaping by exogenic processes.
Highlights
Elongated valley widenings were flooded, and a lot of suspended and fine grained material influenced a significant colmatage
The Krka River and its tributaries make the system of composite valleys in the karst
It is evident in the National Park Krka where nature protection has played an important role
Summary
Received : 2005-06-06 Primljeno: Rijeka Krka sa svojim pritocima čini sustav kompozitnih dolina u kršu. The Krka River and its tributaries make the system of composite valleys in the karst. In the canyon sections there are many characteristic slope relief details. Upravo stoga pojava vode na površini ima veliko značenje. Dolina rijeke Krke upravo na području Sjevernodalmatinske zaravni, gdje u geološkom sastavu prevladavaju karbonatne naslage, predstavlja poseban fenomen. Na najvećem dijelu od Kninskog polja do Roškog slapa Krka teče i do 100 metara iznad lica vode temeljnice, a da pri tom ne gubi vodu iz svoga korita (BONACCI, PERICA, 1990.). Osim prirodnih faktora, na današnji izgled područja oko rijeke Krke, ali i na određene hidrološke elemente (brzina otjecanja vode i vodostaj), znatno je utjecao i čovjek svojim aktivnostima
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