Temat: tereny lessowe - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Modelowanie wilgotności gleby w mikrozlewni lessowej użytkowanej rolniczo
Soil moisture modeling in agricultural micro catchment
Autorzy:: Lopatka, A.
Jadczyszyn, J.
Powiązania:: https://bibliotekanauki.pl/articles/2084625.pdf
Data publikacji:: 2010
Wydawca:: Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:: tereny rolnicze
mikrozlewnie lessowe
gleby
wilgotnosc gleby
zlewnie
Opis:: The aim of work was comparison of two water balance models with different degree of complexity to predict soil moisture in small hilly loess catchment and to compare results of the modeling with field measurement done with TOR probes. In the first "bucket" model soil is treated as a tank for water with definite capacity, in the second more sophisticatcd model elaborated in the FEFLOW software, soil properties are described by retention curve and soil moisture pattern is obtained as a solution of Richards equation. In both models actual evapotranspiration is modeled by FAO56 method. The results obtained from both models were acceptable with similar determination coefficient of about 0,8. However, simulation of soil moisture with the FEFLOW model is more accurate although it requires more parameters and seeking for stable numerical solution. On the other hand it is also more suitable to use in hilly terrain where horizontal soil water fluxes must be taken into account.
Źródło:: Prace i Studia Geograficzne; 2010, 45; 153-164
0208-4589
Pojawia się w:: Prace i Studia Geograficzne
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Zastosowanie Izotopu 137CS do badania erozji gleby w obszarach lessowych użytkowanych rolniczo
Use of 137Cs isotope in research of soil erosion in loessial agricultural areas
Autorzy:: Poreba, G.J.
Powiązania:: https://bibliotekanauki.pl/articles/2084653.pdf
Data publikacji:: 2010
Wydawca:: Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:: tereny rolnicze
uzytkowanie rolnicze
obszary lessowe
erozja gleb
gleby
izotopy
izotop 137 Cs
Opis:: This work presents a use of the ¹³⁷Cs method in the reseach of soil erosion and sedimentation on the agricultural loessial land. There is an urgent need to obtain reliable quantitative data of the soil translocation in agricultural areas and to choose an effective method of soil conservation. After deposition on the land surface, ¹³⁷Cs is rapidly and strongly adsorbed by soil particles. The isotope has been present in the environment since the beginning of nuclear weapon testing and nowadays it is a part of many ecosystems. ¹³⁷Cs is therefore a valuable tracer to study soil erosion and sedimentation rate. Advantages and limitations of the method are discussed in this articles. The activity of the ¹³⁷Cs in soil samples from 4 slopes was measured by means of high-resolution gamma spectrometry and then the ¹³⁷Cs inventories for sampling points were calculated. The ¹³⁷Cs inventories relate to the erosion and deposition rates. The value of soil erosion was calculated by using the proportional model as well as the three mass balance models. The ¹³⁷Cs inventory for studied cultivated field ranges from less than 1.0 up to more than 10.0 kBq m⁻². Differences in ¹³⁷Cs inventory distribution on the terraced and unterraced slopes are clear. The results show that agricultural terraces in the study area were created alter the main period of cesium fallout and that the intensity of soil erosion in the study area appear to be significant.
Źródło:: Prace i Studia Geograficzne; 2010, 45; 125-142
0208-4589
Pojawia się w:: Prace i Studia Geograficzne
Dostawca treści:: Biblioteka Nauki

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