Close-range photogrammetric measurement of the splash and rill soil erosion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00332216" target="_blank" >RIV/68407700:21110/19:00332216 - isvavai.cz</a>

Výsledek na webu

<a href="https://meetingorganizer.copernicus.org/EGU2019/EGU2019-15246.pdf" target="_blank" >https://meetingorganizer.copernicus.org/EGU2019/EGU2019-15246.pdf</a>

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Close-range photogrammetric measurement of the splash and rill soil erosion

Popis výsledku v původním jazyce

Soil erosion is a complex degradation process that produces significant geomorphological changes on the Earth's surface. One of the most significant erosion factors is water that impacts on the soil surface in two different but intertwined ways. Firstly, the falling raindrops affect the soil particles with their kinetic energy, which causes the disintegration of soil aggregates or the transfer of soil particles. The second phenomenon occurs after saturation of the soil sample and the formation of a surface runoff. Gravity and running water produces much greater force, leaving behind much more pronounced changes in the soil surface like rills or gully in a bigger scale. Our projects are focused on two different experimental plot areas. The small scale experiments are performed on a circular area of 10 cm. Only splash erosion is observed and measured with modified Morgan splash cup. Ground sampling distance (GSD) of the DEMs is 0,05 mm. The larger plots, with a size of 4x1 m, was positioned in inclination from 10° to 35° which represent artificial slopes occurring during construction works. In this case, surface runoff and accompanying erosion results in changes of the soil surface e.g. rills formation. In addition, some of these plots were covered geotextiles. One of our goals is also to measure the effectiveness against soil erosion and compare technologies with each other. GSD in this case is lower, it is 1 mm. The photogrammetric monitoring results in sets of digital elevation models (DEMs) before and after experiments. Digital elevation models of difference (DoDs) were calculated and analysed in ArcGIS to obtain following parameters: mean value, standard deviation, slope and aspect. All these parameters are compared with rainfall parameters and manually measured soil loss and also inclination and soil protection in case of the larger scale experiments. This research was supported by grant GA17-33751L/FWF I 304, TH02030428, QK1720289 and SGS17/173/OHK1.

Název v anglickém jazyce

Close-range photogrammetric measurement of the splash and rill soil erosion

Popis výsledku anglicky

Soil erosion is a complex degradation process that produces significant geomorphological changes on the Earth's surface. One of the most significant erosion factors is water that impacts on the soil surface in two different but intertwined ways. Firstly, the falling raindrops affect the soil particles with their kinetic energy, which causes the disintegration of soil aggregates or the transfer of soil particles. The second phenomenon occurs after saturation of the soil sample and the formation of a surface runoff. Gravity and running water produces much greater force, leaving behind much more pronounced changes in the soil surface like rills or gully in a bigger scale. Our projects are focused on two different experimental plot areas. The small scale experiments are performed on a circular area of 10 cm. Only splash erosion is observed and measured with modified Morgan splash cup. Ground sampling distance (GSD) of the DEMs is 0,05 mm. The larger plots, with a size of 4x1 m, was positioned in inclination from 10° to 35° which represent artificial slopes occurring during construction works. In this case, surface runoff and accompanying erosion results in changes of the soil surface e.g. rills formation. In addition, some of these plots were covered geotextiles. One of our goals is also to measure the effectiveness against soil erosion and compare technologies with each other. GSD in this case is lower, it is 1 mm. The photogrammetric monitoring results in sets of digital elevation models (DEMs) before and after experiments. Digital elevation models of difference (DoDs) were calculated and analysed in ArcGIS to obtain following parameters: mean value, standard deviation, slope and aspect. All these parameters are compared with rainfall parameters and manually measured soil loss and also inclination and soil protection in case of the larger scale experiments. This research was supported by grant GA17-33751L/FWF I 304, TH02030428, QK1720289 and SGS17/173/OHK1.

Druh

O - Ostatní výsledky

CEP obor

—

OECD FORD obor

10501 - Hydrology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů