Methodology for application of field rainfall simulator to revise c-factor database for conditions of the Czech Republic

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F16%3A00310892" target="_blank" >RIV/68407700:21110/16:00310892 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Methodology for application of field rainfall simulator to revise c-factor database for conditions of the Czech Republic

Original language description

The presentation introduced a methodology of determination of crop and cover management factor (C-faktor) for the universal soil loss equation (USLE) using field rainfall simulator. The aim of the project was to determine the C-factor value for the different phenophases of the main crops of the central-european region, while also taking into account the different agrotechnical methods. By using the field rainfall simulator, it is possible to perform the measurements in specific phenophases, which is otherwise difficult to execute due to the variability and fortuity of the natural rainfall. Due to the number of measurements needed, two identical simulators was used, operated by two independent teams, with coordinated methodology. The methodology mainly specify the length of simulation, the rainfall intensity, and the sampling technique. Due to the wide range of variable crops and soils, it is not possible to execute the measurements for all possible combinations. We therefore decided to perform the measurements for previously selected combinations of soils,crops and agrotechnologies that are the most common in the Czech Republic. During the experiments, the volume of the surface runoff and amount of sediment will be measured in their temporal distribution, as well as several other important parameters. The key values of the 3D matrix of the combinations of the crop, agrotechnique and soil was determined experimentally. The remaining values was determined by interpolation or by a model analogy. There are several methods used for C-factor calculation from measured experimental data. Some of these are not suitable to be used considering the type of data gathered. The presentation discussed the benefits and drawbacks of these methods, as well as the final design of the method used. The problems concerning the selection of a relevant measurement method as well as the final method of simulation and C-factor determination for the gathered data was discussed.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

DA - Hydrology and limnology

OECD FORD branch

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Project

<a href="/en/project/QJ1530181" target="_blank" >QJ1530181: Determination of the actual values of the protective effect of vegetation in order to quantification and efficiency improvement of erosion control of agricultural land in the Czech Republic</a><br>

Continuities

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

Publication year

2016

Confidentiality

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