Morphometric dataset of the alluvial fans at the southern part of Nayband fault, Iran

This data article provides a precise level data on alluvial fans of the western border of Lut desert, a unique location on the Earth, known as one of the hottest spot on the Earth. This data is essential for morphotectonic investigations and is valuable in the field of tectonic and geomorphology studies. It helps to evaluate the region from the viewpoint of tectonic activity by considering the dynamics of alluvial fans, climate and tectonic setting. The data which are presented for 68 quaternary alluvial fans, is taken by processing of remotely sensed Landsat satellite data, photogeology of aerial photographs, measuring on topographic maps and controlled by field checking. This data is useful for defining of a morphotectonic model of this limited access region considering the uplift of the source area along Nayband fault, as the basin–margin fault, respect to the base level.


a b s t r a c t
This data article provides a precise level data on alluvial fans of the western border of Lut desert, a unique location on the Earth, known as one of the hottest spot on the Earth. This data is essential for morphotectonic investigations and is valuable in the field of tectonic and geomorphology studies. It helps to evaluate the region from the viewpoint of tectonic activity by considering the dynamics of alluvial fans, climate and tectonic setting. The data which are presented for 68 quaternary alluvial fans, is taken by processing of remotely sensed Landsat satellite data, photogeology of aerial photographs, measuring on topographic maps and controlled by field checking. This data is useful for defining of a morphotectonic model of this limited access region considering the uplift of the source area along Nayband fault, as the basinmargin fault, respect to the base level. &

Value of the data
The data presents a morphotectonic outlook about the activity of Nayband Fault. It helps to explain the impact of Nayband fault on the tectonic activity of the Western Lut. Data can be applied for quantitative analysis in the field of tectonic geomorphology and morphotectonics.
Other researchers may use the data for their research work and further investigation.

Data
The data presented here describe the morphometric characteristic of 68 alluvial fans of western Lut desert. Data is given in table form. The data is prepared based on fieldwork in a limited access region and laboratory analysis.

Experimental design, materials and methods
Tectonic setting and climatic fluctuations could fundamentally control morphometrics of alluvial fans, the prominent geomorphological landforms in mountain fronts, by uplifting and maintaining the topography, controlling the sediment supply and duration of deposition through increasing gradients of drainages [1][2][3][4][5][6][7][8][9][10] especially in arid zones where little changes in precipitation can effectively affect stream discharge [11]. These landforms that could be served as important groundwater reservoirs [12,13] made out of loose rock materials that are formed at the mountain fronts where drainages reach the plain. In a mountain range, some of the alluvial fans show different characteristics which are important as they present the history of the changes that have taken place in the region over millennia. They give evidence of tectonic activities and the past climate that had formed the morphology of these landforms and the challenge is to understand the relative impact of each.
In order to achieve this goal, each of the alluvial fans was first mapped through satellite studies and photogeology. Subsequently, their position and boundary were controlled and finalized in the field. Thus, some characteristics such as the environment, area, length and width of alluvial fans were calculated by using the mentioned checked map. To calculate other parameters, such as minimum elevation, average elevation, maximum elevation, elevation gain, elevation loss, maximum slope and the average slope of alluvial fans, after determination of the location of the points on a topographic map, the elevation of them was controlled by GPS on the field.