The aim of the presented studies was to calculate interception values for the sixty-year-old pine stand located in Tuczno Forest District. The area subjected to analysis is located in the north-western part of Poland, in West Pomerania province. The calculations were based on the measurements of precipitation above the tree crowns (2 pluviometers) and at a height of 1 m above the surface (13 pluviometers). Precipitation measurements used in this work were carried out in 30-minute intervals during the entire 2014. The analyses were conducted using mainly A-STER tipping bucket pluviometers. Temporary interception in the studied sixty-year-old pine stand can reach even about seven millimeters. The daily difference between precipitation above the tree crowns and precipitation at 1 m above the surface can reach twelve millimeters. The calculated volume of the so called interception reservoir was about three millimeters (3.26 mm). The annual value of interception for the tested stand was 19.6% of the total annual precipitation. ...
W niniejszej pracy przedstawiono zakres badań hydrologicznych oraz ich wyniki uzyskane w roku 2013 na stacji monitoringowej w Nadleśnictwie Tuczno. Powierzchnia poddana analizom położona jest w północno-zachodniej części Polski na terenie województwa zachodniopomorskiego. Bezpośrednio zmierzono trzy z czterech składowych bilansu wodnego w profilu pionowym: opad atmosferyczny (P), ewapotranspirację (E) oraz zmianę retencji (wilgotność gleby) (ΔR). Odpływ (H) natomiast obliczono ze wzoru: H = P - E - ΔR. Do pomiarów ww. parametrów wykorzystano aparaturę pomiarową składającą się z: - deszczomierzy korytkowych TPG-124-H24 - A-STER i WXT520 - Vaisala (opad atmosferyczny); - system kowariancji wirów (anemometr CSAT3 Campbell Sci. i analizator gazowy LI-7500 - Licor) - pomiar ewapotranspiracji; - reflektometry Campbell Sci. - CS616 (metoda TDR - wilgotność gleby). Obliczone na podstawie zmian wilgotności gleby zmiany retencji dla przedziałów 30 minutowych wykazują synchroniczne fluktuacje do odpowiednich sum opadów atmosferycznych. Amplitudy zmienności wilgotności gleb są odwrotnie proporcjonalne do głębokości p.p.t. (poniżej poziomu terenu). Obliczona średnia wartość odpływu jednostkowego oscyluje w normowym zakresie dla tego regionu.
...
The paper presents trends in average annual soil moisture in the area covered by the sixty-year old pine stand. The area of analysis is located in the Tuczno Forest District, the Martew Forestry, in the north-western part of Poland. The calculations were based on the measurements of soil moisture at seven different depths below the ground level. A set of probes was installed for measuring the moisture using TDR method in order to calculate retention changes in the unsaturated zone. Humidity measurements used in this work were carried out at daily intervals throughout the year 2014. Designated trends were analysed using the non-parametric Mann- Kendall test, which is used for detecting trend of hydrological and meteorological parameters. Negative values of the Mann-Kendall statistics point to a declining trend for most - six out of the seven, analysed levels of measurement. The tendency toward dryness was not confirmed by the data set of precipitations. Although precipitations are considered to be the main driver of variations in soil moisture their impact severity seems to be controlled by other characteristics of the catchment area and components of the water balance, such as evapotranspiration. ...
