Spatial Density of Dolines in the Croatian Territory

Abstract

Cilj je ovog rada utvrditi prostornu gustoću ponikava na području krša Hrvatske i provesti korelaciju izračunatih vrijednosti gustoće ponikava s pojedinim geomorfološkim i geološkim čimbenicima njihova nastanka i razvoja. Kako bi se to postiglo, potrebno je izračunati prostornu gustoću ponikava temeljem jedinstvenih GIS metoda prikupljanja i analize podataka unutar čitavoga istraživanog područja. Gustoća ponikava unutar jedinične površne izračunata je na temelju kartiranih dna ponikava. Za potrebe određivanja dna ponikava upotrijebljene su digitalne kartografske podloge u mjerilu 1 : 25.000. Na temelju dobivenih podataka izračunata je prostorna gustoća ponikava jednostavnom kernel metodom unutar površine od 1 km 2 . Provedenom analizom prostornih razlika u intenzitetu gustoće ponikava, uočene su pojedine veze između njihova razvoja i morfometrijskih parametara reljefa, te litoloških i strukturnih obilježja terena. Spatial Density of Dolines in the Croatian TerritoryThis paper deals with the spatial density of dolines in the Croatian territory covered by karst. The purpose of this paper is to calculate the spatial density of dolines and show a correlation between calculated doline density values and certain geomorphological and geological factors of their origin and development. Therefore, it has been necessary to calculate the spatial density of dolines applying unique GIS methods of data collection and analysis to the entire study area.Doline density per unit area has been calculated based on the mapped doline bottom. 1:25,000 scale digital cartographic models have been used to determine the doline bottom. The given data have been used to calculate the spatial density of dolines applying a simple kernel method to an area of one square kilometre. The analysis of spatial differences in doline density has revealed that certain connections exist between doline development and relief morphometric parameters as well as lithological and structural terrain features.

Relict drainage effects on distribution and morphometry of karst depressions: a casestudy from central Taurus (Turkey)

“…4). The data sets were examined in 1 km × 1 km quadrants to determine spatial densities of depression, relict and non-relict valleys, and the relationships between them (Pahernik, 2012;Bočić et al, 2015). Besides, minimum, 5 %, 25 %, average, 75 %, 95 % and maximum values are calculated for evaluation of morphometric elevation characteristics of depressions (Öztürk et al, 2018b).…”

Fluvio-karstic evolution of the Taşeli Plateau (Central Taurus, Turkey)

“…The data sets were examined in 1 × 1 km (1 km 2 ) quadrats to calculate the spatial density of the dolines (dolines/km 2 ), relict valleys (km/km 2 ), and the relationship between them (Pahernik, 2012;Bočić et al, 2015). Size 25 km 2 (5 × 5 km) quadrats were used to create rose diagrams and to determine the superficial distribution of doline orientations.…”

GIS Based Analysis of Doline Density in Sivas Gypsum Karst (Turkey)

“…Tablo 1: Dolin yoğunluk sınıflandırmaları (Pahernik, 2012) Şekil 3. Topoğrafya ve uydu görüntülerine göre çalışma alanındaki dolin yoğunluk sınıflarının oranları.…”