Measuring splash erosion initiated by simulated rainfall

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F18%3A00326252" target="_blank" >RIV/68407700:21110/18:00326252 - 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

Measuring splash erosion initiated by simulated rainfall

Popis výsledku v původním jazyce

Rainfall simulators are common tool used to study the impact of rainfall on soil surface. This studypresents the effect of various rainfall intensities and kinetic energies to splash erosion under controlled experimental conditions. We utilized “Norton ladder” laboratory rainfall simulator to recurrently simulate several rainfall patterns with predefined kinetic energy and rainfall intensity. First, twelve positions under the simulator were fixed and the rainfall kinetic energy and intensity were measured for those positions. Range of the kinetic energy was 112 through 574 J m-2 h-1 and range of the rainfall intensity 23 through 71 mm h-1. Second, a soil sample contained in round plastic cup with a surface area of 88 cm2 was positioned in the centre of the splash cup with outer diameter of 45 cm. The splash cups were placed on the preselected positions. After every rainfall simulation, the splashed material was collected, filtered and dried in an air dryer to estimate total amount of soil loss. For each of the samples a photographs of the surface were taken before and after the experiments to create digital model of the surface and to calculate changes in roughness and rate of soil compaction. More repetitions were measured for a proper statistical evaluation. We present first results of the observed relationships between rainfall intensity, kinetic energy and splash erosion. This project was funded by projects SGS17/173/OHK1/3T/11 and GA17-33751L.

Název v anglickém jazyce

Measuring splash erosion initiated by simulated rainfall

Popis výsledku anglicky

Rainfall simulators are common tool used to study the impact of rainfall on soil surface. This studypresents the effect of various rainfall intensities and kinetic energies to splash erosion under controlled experimental conditions. We utilized “Norton ladder” laboratory rainfall simulator to recurrently simulate several rainfall patterns with predefined kinetic energy and rainfall intensity. First, twelve positions under the simulator were fixed and the rainfall kinetic energy and intensity were measured for those positions. Range of the kinetic energy was 112 through 574 J m-2 h-1 and range of the rainfall intensity 23 through 71 mm h-1. Second, a soil sample contained in round plastic cup with a surface area of 88 cm2 was positioned in the centre of the splash cup with outer diameter of 45 cm. The splash cups were placed on the preselected positions. After every rainfall simulation, the splashed material was collected, filtered and dried in an air dryer to estimate total amount of soil loss. For each of the samples a photographs of the surface were taken before and after the experiments to create digital model of the surface and to calculate changes in roughness and rate of soil compaction. More repetitions were measured for a proper statistical evaluation. We present first results of the observed relationships between rainfall intensity, kinetic energy and splash erosion. This project was funded by projects SGS17/173/OHK1/3T/11 and GA17-33751L.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10501 - Hydrology

Projekt

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

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

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