Comparison of morphometric characteristics of dolines delineated from TOPO-Maps and UAV-DEMs

Utlu, Mustafa; Öztürk, Muhammed Zeynel

doi:10.1007/s12665-023-10862-x

Cited by 8 publications

(4 citation statements)

References 73 publications

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“…Therefore, it necessarily represents a slightly narrower delineation than reality. At the same time, this instruction is clear and easy to follow for the digitizer, so this method is used quite often, especially if the basic data are topographic maps [7,21,26,31,98]. Another clear definition for doline delineation is the imaginary closed contour at the level of the lowermost point of the doline rim.…”

Section: Methodsmentioning

confidence: 99%

“…However, the growing availability of LiDAR data made it possible to delineate the precise shape of dolines on the basis of high-resolution (i.e., 1-2 m cell size) DTMs [11][12][13][14][15][16][17][18][19][20][21][22]. We note that, in recent years, sinkholes delineated using the SfM (Structure from Motion) method for aerial photos taken from drones have increasingly been included in the analyses [23][24][25][26], but this type of data acquisition has specific issues (e.g., influence of vegetation); therefore, this procedure is not dealt with in this article.…”

Section: Introductionmentioning

confidence: 99%

“…The exact calculation of the volume was previously not possible with the required accuracy or at least rather difficult, but LiDAR-based DTMs also provide an opportunity for this. This is why volume has recently gained a greater significance in sinkhole morphometric studies [10,16,21,26,40,41]. In fact, the volume calculation can be carried out using raster DTMs, or more directly using a point cloud.…”

Section: Introductionmentioning

confidence: 99%

“…The doline density is one of the most frequently used morphometric indicators, which aims to capture the degree of karstification of a given area and to characterize the terrain with a single number. A lot of data on doline density have been collected in recent decades; however, the comparison of these data is not easy due to the different methods used in the analyses [7,9,21,26,29,32,35,[50][51][52][53][54][55].…”

Section: Introductionmentioning

confidence: 99%

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LiDAR-Based Morphometry of Dolines in Aggtelek Karst (Hungary) and Slovak Karst (Slovakia)

Telbisz,

Mari,

Székely

2024

Remote Sensing

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LiDAR-based digital terrain models (DTMs) represent an advance in the investigation of small-scale geomorphological features, including dolines of karst terrains. Important issues in doline morphometry are (i) which statistical distributions best model the size distribution of doline morphometric parameters and (ii) how to characterize the volume of dolines based on high-resolution DTMs. For backward compatibility, how previous datasets obtained predominantly from topographic maps relate to doline data derived from LiDAR is also examined. Our study area includes the karst plateaus of Aggtelek Karst and Slovak Karst national parks, whose caves are part of the UNESCO World Heritage. To characterize the study area, the relationships between doline parameters and topography were studied, as well as their geological characteristics. Our analysis revealed that the LiDAR-based doline density is 25% higher than the value calculated from topographic maps. Furthermore, LiDAR-based doline delineations are slightly larger and less rounded than in the case of topographic maps. The plateaus of the study area are characterized by low (5–10 km−2), moderate (10–30 km−2), and medium (30–35 km−2) doline densities. In terms of topography, the slope trend is decisive since the doline density is negligible in areas where the general slope is steeper than 12°. As for the lithology, 75% of the dolines can be linked to Wetterstein Limestone. The statistical distribution of the doline area can be well modeled by the lognormal distribution. To describe the DTM-based volume of dolines, a new parameter (k) is introduced to characterize their 3D shape: it is equal to the product of the area and the depth divided by the volume. This parameter indicates whether the idealized shape of the doline is closer to a cylinder, a bowl (calotte), a cone, or a funnel shape. The results show that most sinkholes in the study area have a transitional shape between a bowl (calotte) and a cone.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

LiDAR-Based Morphometry of Dolines in Aggtelek Karst (Hungary) and Slovak Karst (Slovakia)

Telbisz,

Mari,

Székely

2024

Remote Sensing

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Fluid flow zones along fracture corridors inferred from collapse dolines in carbonates of the Irecê Basin, Brazil

Maia,

Auler,

Bezerra

et al. 2024

Earth Surf Processes Landf

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Dolines are a widespread karst landform, and understanding their genesis can provide critical information about the evolution of subsurface karstification and groundwater flow zones. Swarms of collapse dolines characterise the karst in the southern portion of the Irecê Basin, northeastern Brazil. The basin comprises Neoproterozoic carbonate rocks approximately 100 m thick, bounded by less soluble older quartzites. The distribution of dolines is not uniform, as they cluster along NW‐SE axes and are aligned with cave systems and permeability (fracture) corridors mostly associated with the Almas and Água de Rega ephemeral rivers. Detailed analysis of sectors with a higher density of dolines was performed using LiDAR and unmanned aerial vehicle (UAV) imagery at two different scales to obtain morphometric and orientation patterns. As expected, scale dependency is observed, with an increase in density and circularity index at a higher resolution scale, but a decrease in mean area and perimeter. However, Voronoi polygon indices are similar at both scales (6.86 ± 1); the departure from the more stable number of six due to the clustering of dolines associated with NW‐SE oriented structural trends. Doline density trends closely follow the orientation of caves, but they are not always spatially connected, since doline evolution may either occlude the caves or be related to a non‐identified void. The Irecê Basin karst system displays a continuum of landforms evolving initially from high‐density fracture zones (fracture corridors), which work as favourable dissolution zones, grading into more integrated flow routes, cave systems and eventually clusters of collapse dolines. Collapse dolines are widespread karst landforms worldwide, and their genesis requires the presence of dissolution voids at depth, which may pass undetected from the surface. In some sectors of Irecê Basin, the existence of doline alignments but the absence of known caves indicates the potential of collapse dolines to be used as proxies for subsurface karstification. Such an approach may allow the prediction of the location and orientation of subsurface zones of enhanced dissolution that can potentially represent productive aquifers or favourable zones for geofluids.

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Morphotectonic development of surface karst in Western Taurus (Türkiye)

Şener,

Şimşek,

Utlu

et al. 2023

Carbonates Evaporites

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The Taurus Mountains include the most important karstic terrain of Turkey and are divided into three parts the Western, Central, and Eastern Taurus. These mountains include many surface and subsurface karst landforms and the morphometric features of these landforms provide important data on the geomorphological and morphotectonic development of karst areas in the Taurus Mountains. Karstic depressions (poljes and dolines) constitute the most important surface landforms in the Western Taurus Mountains. In this study, a total of 7093 micro depressions (doline) and 74 macro depressions (polje) were detected and morphometric properties were calculated located in the Western Taurus Mountains. The poljes developed within the Beydağları Autochthon and Lycian nappes, while the dolines developed especially in the high plateaus within the Beydağları Autochthon. The morphotectonic development of both landforms is as below shortly. As a result of the northward movement of the African plate from the Early Cretaceous to the Late Miocene, the limestones accumulated in the shallow marine environment were compressed in the north direction and made a counterclockwise movement. Depending on this tectonic activity, the Lycian Nappes from the northwest and the Antalya Nappes from the east thrust over the Baydağları autochthon, and thus nappes, reverse faults and fold systems developed in the study area. The Western Taurus began to continentalization from the Oligocene and began to erode from the Miocene, and also with the erosion, the valley systems began to develop in the Western Taurus. The NE-SW and NW-SE directional normal faults have developed under the in uence of extensional tectonics since the Miocene, and this extensional tectonism has caused widespread development of the poljes in the study area. In addition, dolines and paleovalley began to develop in limestone areas at higher elevations with the lowering of the karst base level. All morphometric and morphotectonic processes reveal that the extension of both doline and polje areas in the study area are parallel to the elongation of tectonic structures in the study area.

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Comparison of morphometric characteristics of dolines delineated from TOPO-Maps and UAV-DEMs

Cited by 8 publications

References 73 publications

LiDAR-Based Morphometry of Dolines in Aggtelek Karst (Hungary) and Slovak Karst (Slovakia)

LiDAR-Based Morphometry of Dolines in Aggtelek Karst (Hungary) and Slovak Karst (Slovakia)

Fluid flow zones along fracture corridors inferred from collapse dolines in carbonates of the Irecê Basin, Brazil

Morphotectonic development of surface karst in Western Taurus (Türkiye)

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