The rainwater drainage system and the ditch network efficiency in the Požega – Slavonia Country

Abstract

Požeško – slavonska županija nalazi se u središtu Slavonije. Okružena je planinama i gorama te rijekama: Orljavom, Londžom, Pakrom i Bijelom koje pripadaju savskom porječju. Rijeka Orljava svojim sjevernim dijelom predstavlja vododijelnicu slivova Save i Drave te je glavni odvodni recipijent za sve vodotoke Požeške kotline. U cijelom slivu su prisutni procesi dubinske erozije, a kao posljedica toga javljaju se i znatne količine vučenog nanosa raznih granulacija, što ovisi o geološkoj podlozi, visinskoj razlici i dužini potoka. Nakon obilnijih kiša relativno brzo dolazi do formiranja poplavnih voda bujičnog karaktera. 2014. godine županiju su zadesile poplave od kojih je najviše stradalo područje grada Pleternice. Pleternica nije stradala od Vrbove nego od Orljave koja se izlila iz korita i uzrokovala poplave. Ključne riječi: poplava, Orljava, sliv, PleternicaPožega - Slavonia County is located in the center of Slavonia. It is surrounded by mountains and rivers: Orljava, Londža, Pakra and Bijela which belong to the Sava river basin. In the northern part, the Orljava River represents the watershed of the Sava and Drava basins, and is the main drainage recipient for all the waters of the Požega Basin. Depth erosion processes are present throughout the basin and, as a consequence, considerable amounts of drawn sediment of various granulations occur, depending on the geological background, altitude difference and length of the stream. After heavy rainfall, flood waters are formed relatively quickly. In 2014, the county was hit by the floods, the worst was in the Pleternica area. The Pleternica was not damaged by Vrbova but by Orljava, which spilled out of the trough and caused flooding. Key words: flood, Orljava, basin, Pleternic