The scientific monograph ('Palaeofloods in karstic Ljubljanica River Catchment') presents a research on palaeofloods in the main water confluence in the Ljubljanica River Catchment, namely the area ...between the Pivka Basin, Cerknica Karst Polje, and Planina Karst Polje. Several geomorphological forms genetically related to floods have been identified, e.g. floodplains, river terraces, corrosion notches on cave walls, as well as laminated fine-grained sediments. Since they were found at higher altitudes than the present floods reach, they were considered as palaeoflood features. Morphometric analysis of the studied geomorphological forms was used to determine the volume of palaeofloods and their altitudinal range. The hydrometric characteristics of the palaeofloods where calculated by computer modelling. Petrological analyses of fine-grained sediments from the surface and caves were used to determine the origin of sediments and their settling velocities, hence to prove their flood origin. Furthermore, morpho-chronological analyses with radiometric methods 14C and U-Th on flowstones interlaying with flood sediments where carried out. The results show that the volume and altitude of palaeofloods throughout the study area fairly exceeded the highest known recent floods.
Vodogradbeni protipoplavni ukrepi predstavljajo pomemben del varstva pred poplavami. Z njimi lahko obvladujemo določen del poplavnega tveganja. Njihov osnovni namen je zmanjševanje poplavne ...nevarnosti na poplavnih območjih, ki si jih je prisvojil človek s svojimi najrazličnejšimi dejavnostmi. Predstavljeni so nekateri najpogostejši vodogradbeni ukrepi za varstvo pred škodljivim delovanjem hudourniških poplav, njihov osnovni princip delovanja, glavne prednosti in slabosti ter vplivi na okolje.
Po tem, ko je leta 1451 knez Friderik Celjski II. podelil kraju mestne pravice, so Celje obdali z obzidjem. Njegova prvotna oblika ni znana, saj je ob koncu 17. stoletja mesto pogorelo. Na ...jugozahodnem delu ga omejuje Vodni stolp. Vanj so vzidani rimski kamni in marmorna plošča, ki označuje višino, ki jo je Savinja dosegla med poplavo leta 1672.
V prispevku je obravnavana uporabnost postopkov strojnega učenja pri ugotavljanju poplavljenih območij v zgornjem delu Selške doline, ki jo je 18. 9. 2007 prizadelo hudourniško deževje. Hitro ...prepoznavanje poplavljenih območij je ključnega pomena za učinkovito reševanje in povračilo škode od zavarovalnic. Pri tem so zelo uporabni satelitskiposnetki, saj omogočajo hitro določitev poplavljenih območij, tudi če so prizadeti zelo veliki predeli. Za prepoznavanje poplavljenih območij v Selški dolini so bile uporabljene tehnike strojnega učenja zrazličnimi vhodnimi podatki: satelitski posnetek SPOT (multispektralni in pankromatski), indeks NDVI, relief in njegovi izdelki (nadmorska višina, naklon, ukrivljenost), oddaljenost od vodotokov in raba tal. Učni vzorci, ki so bili uporabljeni za oblikovanje modela klasifikacije, so vsebovali 400, 255 oziroma49 vzorčnih točk. : This paper discusses the usefulness of machinelearning procedures for determining flooded areas in the upper part of the Selška valley. The area was affected by torrential rains on 18.9.2007. Rapid identification of flooded areas is essential for effective implementation of rescue operations and damage assessments. In this case, satellite images are very useful because they enable quick identification of flooded areas even in very large areas. To determine the flooded areas, machine learning techniques were applied to different input data. SPOT satellite image (multispectral and panchromatic), NDVI index, relief and its derivatives (altitude, slope, curvature), distance from rivers and land use were used. The learning samples consisted of 400, 255 and 49 sample points, which were used to build three different classification models.
Z geografskega vidika naravne nesreče niso zgolj izjemni dogodki, temveč so del zapletenega sistema odnosov med naravo in družbo. Geografija jih obravnava kot sestavni del pokrajine, v kateri je ...možno z geografskimi metodami identificirati njihovo prisotnost, učinke na naravo in družbo ter možne prilagoditve človeške družbe nanje, kar je ključnega pomena za preprečevanje negativnih posledic in eden od predpogojev za smotrno prostorsko načrtovanje in za uveljavitev paradigme sonaravnega razvoja.
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