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Start Over Coverage 125-146

2. Migrace na českém venkově na počátku 20. století

Creator:
Zeitlhofer, Hermann
Format:
print
Type:
model:internalpart and TEXT
Language:
Czech
Description:
This study made it possible to show, using the example of Bohemia, that agrarian areas which have thus far been viewed as the “traditional” regions of emigration, also feature significant numbers of immigrants. Migration from agrarian regions not only moved in the direction of towns and urban centres. Commonly it was the case that each region was connected with other regions along multidirectional channels of exchange. In addition, in the rural environment there is clear evidence of the existence of an important system of seasonal migration. Intensive research of migration flows in the Central European rural environment, a task that still awaits international historiography, will certainly bring to light many more, thus far unknown, migration systems.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3. Prognózy šírenia znečišťujúcich látok z bodových zdrojov vo zvodnenom systéme v zóne vplyvu navrhovaného vodného diela Sereď-Hlohovec

Creator:
Burger, František and Čelková, Anežka
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
groundwater quality, transport and dispersion of dissolved matters, lower Vah River basin, Sered-Hlohovec waterwork, point sources of pollution, MT3D transport model, simulations and forecasts, kvalita podzemnej vody, transport a disperzia látok, povodie dolného Váhu, vodné dielo Sereď-Hlohovec, bodové zdroje znečisťovania, transportný model MT3D, and simulácie a prognózy
Language:
Slovak
Description:
The paper describes the main point sources of groundwater pollution in the Lower Váh River flood plain in the zone of influence of the designed waterwork Sereď-Hlohovec. These are the sludge beds of the Wire Mill Hlohovec and the industrial waste of nickel production (futher only waste) depot near Sereď town. The plumes of propagation of representatives of non-adsorbing dissolved matters in ground water - chlorides and nitrates - were acquired by simulation by means of transport models created by the MT3D code. The forecasts of pollutant propagation assuming steady ground water flow were elaborated for the derivation variant of the designed waterwork and for the so-called do-nothing variant, i.e. the forecasted water regime of the territory in case the waterwork is not built. As chlorides are leaking from the sludge bed of the Wire Mill Hlohovec, j.s.c. and assuming that their concentration will remain as high as at present, the possibility of direct manifestations of ground water quality deterioration in the surrounding of the sludge bed has to be reckoned with if the waterwork is built and operated but also in the event that the waterwork will not be built at all. Similarly, we may state that the leakage of nitrates from the waste depot will result in the deterioration of water quality in the surroundings and that the pollution will spread towards Galanta town and Gáň. By comparing the plumes of pollutant propagation and concentration we found out, that the Sereď-Hlohovec waterwork will affect neither the direction of propagation, nor the concentration of nitrates leaking from the waste depot near Sereď. and V príspevku sú opísané hlavné bodové zdroje znečisťovania podzemnej vody v poriečnej nive dolného Váhu v zóně vplyvu navrhovaného vodného diela Sereď-Hlohovec, ktorými sú kalové pole Drôtovne a.s., Hlohovec a skládka luženca blízko Seredě. Pomocou matematického transportného programu MT3D boli získané jazyky šírenia koncentrácie reprezentantou neadsorbujúcich rozpustených látok v podzemnej vode - chloridov a dusičnanov. Prognózy šírenia kontaminantov za predpokladu ustáleného stavu prúdenia podzemnej vody boli vypracované pre derivačný variant navrhovaného vodného diela a pre tzv. nulový variant, t.j. prognózovaný vodný režim územia, ak by sa stavba vodného diela nerealizovala. Pri existencii únikov chloridov z kalového poľa Drôtovne a.s., Hlohovec a za predpokladu, že ich koncentrácia bude rovnako vysoká ako je v súčasnosti, treba počítať s možnosťou priamych prejavov zhoršovania sa kvality podzemnej vody v okolí kalového poľa, a to v prípade výstavby a prevádzky vodného diela, ale aj v prípade, že sa vodné dielo stavať nebude. Podobne možno konštatovať, že pri únikoch dusičnanov z okolia skládky luženca pri Seredi bude docházať k zhoršovania kvality podzemných vôd v blízkom okolí a jazyk znečistenia bude postupovať smerom na Galantu a Gáň. Porovnaním jazykov šírenia kontaminantu a jeho koncentrácie bolo zistené, že vodné dielo Sereď-Hlohovec nebude mať vplyv ani na smer pohybu ani na koncentráciu dusičnanov šíriacich sa z okolia skládky luženca.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public