Monitoring soil surface by close-range photogrammetry in multiple scales

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F18%3A00330091" target="_blank" >RIV/68407700:21110/18:00330091 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Monitoring soil surface by close-range photogrammetry in multiple scales

Popis výsledku v původním jazyce

UAV and close-range photogrammetry can be used for complex monitoring of soil surface and related degradation processes. We can accurately assess the rill volumes by creating DEMs with millimeter resolutions. The system of automatic volumetric analyses in larger scales needs accurate rill boundary definitions to be able to create pre-erosion surface estimation. For the purpose different morphometry analyses were tested but skilled visual interpretation proved to be the best. Here multiple flying altitudes can serve to get from handheld imagery in testing zones (sub millimeter GSD) to accurate total field estimates. We could estimate actual sediment fluxes over ca 10 ha watersheds. Secondly, handheld imagery serves as a basis for estimating actual soil surface roughness under different tillage types and a soil roughness decay in time related to rain impact. Here ca 1 mm GSD surface models provide necessary information. Finally, close range photogrammetry in micrometer resolution is used to define changes in soil surface morphometry induced directly by raindrop impacts. Experiments with splash cups aim to define relation between rain kinetic energy and splash erosion. Here photogrammetry is used to interpret differences in surface change of different soils, in soil aggregates’ destruction by raindrops of different sizes and velocities. The research is supported by project of Ministry of Agriculture of the Czech Republic No. QK1720289 and by project No. GA17-33751L.

Název v anglickém jazyce

Monitoring soil surface by close-range photogrammetry in multiple scales

Popis výsledku anglicky

UAV and close-range photogrammetry can be used for complex monitoring of soil surface and related degradation processes. We can accurately assess the rill volumes by creating DEMs with millimeter resolutions. The system of automatic volumetric analyses in larger scales needs accurate rill boundary definitions to be able to create pre-erosion surface estimation. For the purpose different morphometry analyses were tested but skilled visual interpretation proved to be the best. Here multiple flying altitudes can serve to get from handheld imagery in testing zones (sub millimeter GSD) to accurate total field estimates. We could estimate actual sediment fluxes over ca 10 ha watersheds. Secondly, handheld imagery serves as a basis for estimating actual soil surface roughness under different tillage types and a soil roughness decay in time related to rain impact. Here ca 1 mm GSD surface models provide necessary information. Finally, close range photogrammetry in micrometer resolution is used to define changes in soil surface morphometry induced directly by raindrop impacts. Experiments with splash cups aim to define relation between rain kinetic energy and splash erosion. Here photogrammetry is used to interpret differences in surface change of different soils, in soil aggregates’ destruction by raindrops of different sizes and velocities. The research is supported by project of Ministry of Agriculture of the Czech Republic No. QK1720289 and by project No. GA17-33751L.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10500 - Earth and related environmental sciences

Projekt

<a href="/cs/project/QK1720289" target="_blank" >QK1720289: Vývoj automatizovaného nástroje pro optimalizaci monitoringu eroze zemědělské půdy pomocí distančních metod</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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