Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

2 Journal of Ecological Engineering

2 2020

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Agricultural Tile Drainage Detection within the Year Using Ground Penetrating Radar

100%

Karásek P. , Nováková E.

2020

tom Vol. 21, nr 4

203--211

The aim of this study was to identify the tile drainage systems within the year (from spring to autumn) using the ground penetrating radar (GPR) geophysical method. The measurements were performed in the experimental locality Dehtáře in the Bohemo-Moravian Highland (Czech Republic) in the years 2016 and 2017. The profiles located in the drained area were repeatedly measured together with the drainage discharges, soil moisture and groundwater level. The best visibility of tile drains was observed during snowmelt (in March and April) when the drainage discharges usually reach their maximum. In other months, the visibility of the drains was variable, but mostly worse. For a reliable detection of individual drains, the measurements above the drainage must be performed in several profiles. Under the conditions of the Czech Republic, the best results were obtained by a 500 MHz frequency antenna.

The Effect of Windbreak Parameters on the Wind Erosion Risk Assessment in Agricultural Landscape

80%

Kučera J. , Podhrázská J. , Karásek P. , Papaj V.

tom Vol. 21, nr 2

150--156

The increasing risk of wind erosion in the context of climate change represents a highly pressing issue. This increase is a result of the growing occurrence of droughts and elevated temperatures in the intensively farmed areas. Effective protection against the wind erosion can be provided by windbreaks, especially during the period when the soil is not protected by the vegetation cover of crops. In this report, the authors wanted to compare the methods defining the windbreak protection zones. The optical porosity and the windbreak height were the basic parameters for defining the protection area. The various methods differ among themselves by using the windbreak height parameter or not. The optical porosity of the windbreaks was determined based on photographic documentation. For the comparison, the cadastral area of Micmanice was selected due to the wide network of windbreaks in this locality. A database of windbreak height and optical porosity for each windbreak was set up. Our report thus presents the application of the new knowledge aimed at updating the methods and procedures for assessing the vulnerability of the area by wind erosion. The application of the method involving the optical porosity and windbreak height parameters resulted in a significant reduction of the windbreak protection zone compared to the method omitting the windbreak height.