The influence of meteorological conditions in winter period on the soil erodibility and wind erosion vulnerability

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027049%3A_____%2F19%3AN0000131" target="_blank" >RIV/00027049:_____/19:N0000131 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

The influence of meteorological conditions in winter period on the soil erodibility and wind erosion vulnerability

Popis výsledku v původním jazyce

A factor contributing to wind erosion on heavy soils is the course of meteorological conditions. In the winter period have effect mainly soil moisture, freezing and thawing of soil surface and in spring period dry soil surface and intense air flow. An impact of these events can cause erosion episodes even on fine textured heavy soils (clay, loam). During winter, water and frost are subject to aggregation and disaggregation with a positive influence on the soil structure. In some cases, the course of weather in winter can contribute to the breakdown of aggregates and the formation of the structure prone to erosion. Due to the pressure of freezing of the soil water and subsequent spillage, the soil aggregates are broken down into erodible fractions that can cause an erosion event evoked by the effect of wind flow. For the analysis of the erodibility of heavy soils due to meteorological conditions in the winter period, the soil types of Fluvisols and Phaeosols were selected in the localities of South Moravia (Czech Rep.), vulnerable to wind erosion. Soil samples were withdrawn from the soil surface, on fields with or without vegetation (winter wheat), in five autumn / spring seasons. The air-dried soil samples were subjected to aggregate analysis. To determine the non-erodible fraction, a sieve with a mesh size of 2 mm was used. Climate data on soil surface temperature and soil moisture status were obtained from the closest hydrometeorological station. From these data, the number and duration of freeze (-2 ° C) / thaw (+ 0 ° C) periods were also determined, as well as information on the number of soil conditions promoting soil aggregate destruction (soil surface wet or covered with melting snow). The results show significant influence of the vegetation cover (lower increase of soil erodibility). The higher the number of freeze-thaw (F / T) periods, the higher the amount of the erodible fraction; the effects increase with higher number of soil conditions with a wet surface.

Název v anglickém jazyce

The influence of meteorological conditions in winter period on the soil erodibility and wind erosion vulnerability

Popis výsledku anglicky

A factor contributing to wind erosion on heavy soils is the course of meteorological conditions. In the winter period have effect mainly soil moisture, freezing and thawing of soil surface and in spring period dry soil surface and intense air flow. An impact of these events can cause erosion episodes even on fine textured heavy soils (clay, loam). During winter, water and frost are subject to aggregation and disaggregation with a positive influence on the soil structure. In some cases, the course of weather in winter can contribute to the breakdown of aggregates and the formation of the structure prone to erosion. Due to the pressure of freezing of the soil water and subsequent spillage, the soil aggregates are broken down into erodible fractions that can cause an erosion event evoked by the effect of wind flow. For the analysis of the erodibility of heavy soils due to meteorological conditions in the winter period, the soil types of Fluvisols and Phaeosols were selected in the localities of South Moravia (Czech Rep.), vulnerable to wind erosion. Soil samples were withdrawn from the soil surface, on fields with or without vegetation (winter wheat), in five autumn / spring seasons. The air-dried soil samples were subjected to aggregate analysis. To determine the non-erodible fraction, a sieve with a mesh size of 2 mm was used. Climate data on soil surface temperature and soil moisture status were obtained from the closest hydrometeorological station. From these data, the number and duration of freeze (-2 ° C) / thaw (+ 0 ° C) periods were also determined, as well as information on the number of soil conditions promoting soil aggregate destruction (soil surface wet or covered with melting snow). The results show significant influence of the vegetation cover (lower increase of soil erodibility). The higher the number of freeze-thaw (F / T) periods, the higher the amount of the erodible fraction; the effects increase with higher number of soil conditions with a wet surface.

Druh

O - Ostatní výsledky

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/QK1710197" target="_blank" >QK1710197: Optimalizace metod hodnocení ohroženosti území větrnou erozí a návrhů ochranných opatření v zemědělsky intenzivně využívané krajině</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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