SfM-MVS Photogrammetry for Splash Erosion Monitoring under Natural Rainfall

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F21%3A00347409" target="_blank" >RIV/68407700:21110/21:00347409 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1002/esp.5087" target="_blank" >https://doi.org/10.1002/esp.5087</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/esp.5087" target="_blank" >10.1002/esp.5087</a>

Jazyk výsledku

angličtina

Název v původním jazyce

SfM-MVS Photogrammetry for Splash Erosion Monitoring under Natural Rainfall

Popis výsledku v původním jazyce

An understanding of splash erosion is the basis to describe the impact of rain characteristics on soil disturbance. In typical splash cup experiments, splashed soil is collected, filtered and weighed. As a way to collect additional data, our experiments have been supplemented by a photogrammetric approach. A total of three soils were tested across three sites; one in the Czech Republic and two in Austria, all equipped with rain gauges and disdrometers to measure rainfall parameters. The Structure from Motion-Multi-View Stereo (SfM-MVS) photogrammetric method was used to measure the raindrops impact on the soil surface. The images were processed using Agisoft PhotoScan, resulting in orthophotos and digital elevation models (DEM) with a resolution of 0.1 mm/pix. The surface statistics included the mean surface height (its standard deviation was used as a measure of surface roughness), slope and other parameters. These parameters were evaluated depending on soil texture and rainfall parameters. The results show a linear correlation between consolidation and splash erosion with a coefficient of determination (R2) of approximately 0.65 for all three soils. When comparing the change in soil volume with rainfall parameters, the best correlation was found with the maximum 30-minute intensity (I30) resulting in the R2 0.48 (soil A, silt loam, 26% clay); 0.59 (soil B, silt loam, 18% clay); and 0.68 (soil C, loamy sand, 12% clay). The initial increase in the sample volume for the lowest splashed mass corresponds with the increase in the clay content of each of the soils. Soil A swells the most. Soil B swells less. Soil C does not swell at all, and consolidates the most. We derived the relationship between the photogrammetrically measured change in surface height and the splash erosion (measured by weight) by accounting for the effect of the clay content.

Název v anglickém jazyce

SfM-MVS Photogrammetry for Splash Erosion Monitoring under Natural Rainfall

Popis výsledku anglicky

An understanding of splash erosion is the basis to describe the impact of rain characteristics on soil disturbance. In typical splash cup experiments, splashed soil is collected, filtered and weighed. As a way to collect additional data, our experiments have been supplemented by a photogrammetric approach. A total of three soils were tested across three sites; one in the Czech Republic and two in Austria, all equipped with rain gauges and disdrometers to measure rainfall parameters. The Structure from Motion-Multi-View Stereo (SfM-MVS) photogrammetric method was used to measure the raindrops impact on the soil surface. The images were processed using Agisoft PhotoScan, resulting in orthophotos and digital elevation models (DEM) with a resolution of 0.1 mm/pix. The surface statistics included the mean surface height (its standard deviation was used as a measure of surface roughness), slope and other parameters. These parameters were evaluated depending on soil texture and rainfall parameters. The results show a linear correlation between consolidation and splash erosion with a coefficient of determination (R2) of approximately 0.65 for all three soils. When comparing the change in soil volume with rainfall parameters, the best correlation was found with the maximum 30-minute intensity (I30) resulting in the R2 0.48 (soil A, silt loam, 26% clay); 0.59 (soil B, silt loam, 18% clay); and 0.68 (soil C, loamy sand, 12% clay). The initial increase in the sample volume for the lowest splashed mass corresponds with the increase in the clay content of each of the soils. Soil A swells the most. Soil B swells less. Soil C does not swell at all, and consolidates the most. We derived the relationship between the photogrammetrically measured change in surface height and the splash erosion (measured by weight) by accounting for the effect of the clay content.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20705 - Remote sensing

Projekt

<a href="/cs/project/GF17-33751L" target="_blank" >GF17-33751L: Vliv kinetické energie deště na uvolňování a transport půdních částic</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Earth Surface Processes and Landforms

ISSN

0197-9337

e-ISSN

1096-9837

Svazek periodika

46

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

16

Strana od-do

—

Kód UT WoS článku

000626240400001

EID výsledku v databázi Scopus

2-s2.0-85102195381