Wyniki wyszukiwania - BazTech

1

Distribution and ecology of two interesting diatom species Navicula flandriae Van de Vijver et Mertens and Planothidium nanum Bąk, Kryk et Halabowski in rivers of Southern Poland and their spring areas

Halabowski Dariusz, Bąk Małgorzata, Lewin Iga

Oceanological and Hydrobiological Studies

|

2021

|

Vol. 50, No. 2

137--149

EN

In this paper, we report new records of rare diatoms that have recently been found in Southern Poland. Planothidium nanum was found only in the upper reaches of the Centuria River, which is not exposed to human influence, while Navicula flandriae was found in two rivers (the Bolina and the Mleczna) affected by salt mine water from hard coal mines. The impact of anthropogenic salinity on diatom communities is as yet poorly documented. Therefore, we conducted a survey on this phenomenon. We surveyed seven sampling sites for diatom assemblages and habitat characteristics, including three sampling sites impacted by mine water. Navicula flandriae was recorded at both sampling sites affected by salt mine water and in two other rivers (the Centuria and the Mitręga), indicating its wide preference for salinity. We confirmed the occurrence of P. nanum at the same site where this species was found and described in our previous paper. In addition, we recorded the occurrence of this species at two other sites in habitats with similar characteristics (lower reaches of the Centuria and Wiercica rivers). Our results indicate a more common occurrence of N. flandriae and P. nanum, which means that further monitoring of diatoms is necessary.

2

Hyperspectral reflectance models for soil salt content by filtering methods and waveband selection

Zeng W. Z., Huang J. S., Xu C., Ma T., Wu J. W.

Ecological Chemistry and Engineering. S

|

2016

|

Vol. 23, nr 1

117--130

EN

For improving the understanding of interactions between hyperspectral reflectance and soil salinity, in situ hyperspectral inversion of soil salt content at a depth of 0-10 cm was conducted in Hetao Irrigation District, Inner Mongolia, China. Six filtering methods were used to preprocess soil reflectance data, and waveband selection combined by VIP (variable importance in projection) and b-coefficients (regression coefficients of model) was also applied to simplify model. Then statistical methods of partial least square regression (PLS) and orthogonal projection to latent structures (OPLS) were processed to establish the inversion models. Our findings indicate that the selected sensitive wavebands for the 6 filtering methods are different, among which the multiplicative signal correction (MSC) and standard normal variate methods (SNV) have some similar sensitive wavebands with unfiltered data. Derivatives (DF1 and DF2) could characterize sensitive wavebands along the scale of VNIR (350-1100 nm), especially the second derivative (DF2). The sensitive wavebands for continuum-removed reflectance method (CR) have protruded many narrow absorption features. For orthogonal signal correction method (OSC), the selected wavebands are centralized in the range of 565-1013 nm. The calibration and evaluation processes have demonstrated the second order derivate filtering method (DF2) combined with waveband selection is superior to other processes, for it has high R2 (larger than 0.7) both in PLS and OPLS models for calibration and evaluation, by choosing only 156 wavebands from the whole 700 wavebands. Meanwhile, OPLS method was considered to be more suitable for the analyzing than PLS in most of our situations.

3

Badania wilgotności zasolonej cegły ceramicznej nieniszczącą metodą dielektryczną

Pala A.

Materiały Budowlane

|

2013

|

nr 6

60--62

EN

The paper presents tests of the mass moisture content of salt-affected ceramic bricks, stored in respectively a nitrate medium, a chloride medium, a sulphate medium and a reference water medium, carried out using the nondestructive dielectric method. From the test results correlations between mass moisture content Wm and dielectric meter indication X for ceramic brick damp with water and with water solutions containing salts in different ionic concentrations were derived. It is shown that salinity significantly affects the X indications of the dielectric meter used in the tests, which may contribute to a significant (for building practice) error in the estimation of the moisture content in salt-affected brick masonry.

4

Zasolenie wód podziemnych kenozoiku Polski północno-zachodniej w wyniku ascenzji solanek z mezozoiku

Kaczor D.

Przegląd Geologiczny

|

2005

|

Vol. 53, nr 6

489--499

EN

The salinization of Cenozoic aquifers caused by brines ascending from the Mesozoic was described on the basis of results of 7747 archival chemical analyses. The zones of confirmed aquifer salinization, defined by chloride concentration exceeding 60 mg/dm^3 and 70 mg/dm^3 (upper limits of hydrochemic background values), within the Pleistocene and Paleogene, Miocene and Pliocene usable groundwater aquifers respectively, occupy an area of 8600 km^2 (33 % of the study area), whilst the zones of potential salinization hazard extend on further 4900 km^2 (19%). The groundwater salinization zones are mostly connected with the uplifted tectonic blocks, salt anticlines and fault zones, the structures allowing upwards directed migration of the Mesozoic brines into the Cenozoic useful aquifers. The salinization development is generally controlled by the flow directions within the active circulation zone and causes migration of brines under pressure along the tectonically produced pathways. The salinity increase affecting groundwater in the Cenozoic aquifers does not result from the recent leaching of the Zechstein salt bod-ies, as they are mostly isolated from the groundwater active circulation system. The ascending diluted brines constitute a potential threat to 4 (Uznam–101 and Wolin–102, Rooecino–103, Dębno–134) from among 20 Major Groundwater Reservoirs and to 17 from among 31 main municipal groundwater intakes (total well discharge >100 m^3/h).

5

Dynamika zasolenia warstw gleby przy uwzględnieniu parowania

Kazieko H., Kazieko L.

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

|

2003

|

Vol. 12, No. 1

43--51

EN

Analytical model of top soil salenization with taken into account evaporation is proposed. Mathematical solution of this problem allow to determine an sald concentration in soil water.