Wyniki wyszukiwania - Biblioteka Nauki

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

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Interpretation of soil erosion in a Polish loess area using OSL, 137Cs, 210Pbex, dendrochronology and micromorphology – case study: Biedrzykowice site (s Poland)

100%

Poręba G. , Śnieszko Z. , Moska P. , Mroczek P. , Malik I.

Geochronometria

2019

tom Vol. 46, no. 1

57--78

Loess areas used for agriculture are susceptible to soil erosion. The intensive process of soil erosion in Polish loess areas began with the onset of the Neolithic and has continued intermittently until today. This work presents the results of soil erosion from simultaneous use of the 137Cs and 210Pbex methods on an agricultural field located on loess slope. Moreover, to establish the age of accumulated sediment connected with water slope erosion, OSL dating, selected physicochemical and micromorphological analyses were applied. The reference values of the 137Cs and 210Pbex fallout for the studied site (Biedrzykowice, the Proszowice Plateau, Małopolska Upland) equal 2627 (45% connected with Chernobyl) and 4835 Bq·m–2, respectively. The results of the 137Cs and 210Pbex inventories measured for the agricultural field range from 730 to 7911 and from 1615 to 11136 Bq·m–2, respectively. The mean soil erosion is about 2.1 kg·m–2·a–1 (about 1.4 mm·a–1). The accumulation of the colluvial sediments started in the Neolithic and drastically increased in the Middle Ages. The examined gully catchment in Biedrzykowice has probably developed quite rapidly as a result of increased erosion. This resulted in the abandonment of this area as farmland and, consequently, in the minimization of water erosion on the slope due to the entrance of woody vegetation in this area. Erosion processes were highly intensified during the last 70 years as a result of deforestation after World War II and intensive agricultural reuse of this area after a break, as indicated by isotope measurements and dendrochronology.

Beaver ponds and mill ponds. History and water retention function. The Polish Plain study

100%

Rurek M. , Śnieszko Z. , Podgórski Z. , Brykała D. , Poręba G.

Geography and Tourism

2023

tom Vol. 11, No. 1

17--32

This paper presents the results of studies on small-scale water retention in beaver ponds and mill ponds located within the Polish Plain in the catchments of the Brda and Wda Rivers. Findings regarding small-scale retention in the Holocene were based on geological surveys and archival materials in the presence of beaver ponds and mill ponds. Traces of Holocene and contemporary beaver colonisation in this area have been documented. We collected data on the location of mill ponds during various developmental periods of the millers’ trade. The potential maximum retention in Holocene beaver ponds, contemporary beaver ponds and mill ponds was estimated and compared in both examined catchments at various stages of the development of the miller’s trade. It was established that retention in mill ponds at the peak of the development of the miller’s trade in the catchments of Brda and Wda was four times lower than the potential retention in beaver ponds during the pre-anthropogenic stage of the Holocene. Current small-scale retention in beaver ponds is variable and definitely smaller than natural and anthropogenic retention in the past. It did not compensate for the water loss associated with irrigation practices in this area.