Transport of matters evoked with erosion in a small agricultural catchment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027049%3A_____%2F19%3AN0000133" target="_blank" >RIV/00027049:_____/19:N0000133 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Transport of matters evoked with erosion in a small agricultural catchment

Popis výsledku v původním jazyce

Harmful impacts of water erosion processes belong among the serious widespread problems of current environment conservation and maintaining of sustainable development of human population. Disturbance of soil surface, loss of soil particles and nutrients evokes reduction of soil fertility but, on the other side (among others), it negatively influences siltation of water bodies and surface water quality. Erosion events have been studied in a small agricultural catchment Němčický stream in the Czech Republic since 2005. The experimental catchment (3 km2) is situated in a hilly area north from Brno. There runs continual gauging of outflows and precipitations in the profile with a Thomson´s weir. Samples of surface water are taken with an automatic sampler during extreme rainfall-runoff events. Concentrations of insoluble matters, phosphorus and nitrogen are analysed in them. Erosion symptoms on the arable land (ridges, accumulation) are also studied and state of land use and vegetation cover are registered. Content of the nutrients (mentioned above) is monitored in soils and sediments in stream and on the bottom of reservoir closing the experimental catchment. The results enable to evaluate siltation velocity in the reservoir and to investigate nutrients transport in the catchment. From the year of the reservoir construction (2012), the bottom sediment has risen of 0.6 mm/year on the average. Total nitrogen and likewise phosphorus concentration in the bottom sediment appears to be nearly twice higher than in soils.

Název v anglickém jazyce

Transport of matters evoked with erosion in a small agricultural catchment

Popis výsledku anglicky

Harmful impacts of water erosion processes belong among the serious widespread problems of current environment conservation and maintaining of sustainable development of human population. Disturbance of soil surface, loss of soil particles and nutrients evokes reduction of soil fertility but, on the other side (among others), it negatively influences siltation of water bodies and surface water quality. Erosion events have been studied in a small agricultural catchment Němčický stream in the Czech Republic since 2005. The experimental catchment (3 km2) is situated in a hilly area north from Brno. There runs continual gauging of outflows and precipitations in the profile with a Thomson´s weir. Samples of surface water are taken with an automatic sampler during extreme rainfall-runoff events. Concentrations of insoluble matters, phosphorus and nitrogen are analysed in them. Erosion symptoms on the arable land (ridges, accumulation) are also studied and state of land use and vegetation cover are registered. Content of the nutrients (mentioned above) is monitored in soils and sediments in stream and on the bottom of reservoir closing the experimental catchment. The results enable to evaluate siltation velocity in the reservoir and to investigate nutrients transport in the catchment. From the year of the reservoir construction (2012), the bottom sediment has risen of 0.6 mm/year on the average. Total nitrogen and likewise phosphorus concentration in the bottom sediment appears to be nearly twice higher than in soils.

Druh

O - Ostatní výsledky

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/QK1910282" target="_blank" >QK1910282: Možnosti zmírnění dopadů extrémních srážko-odtokových jevů v malých povodích s ohledem na požadavky trvale udržitelného zemědělského hospodaření a produkce ryb</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