Efekti aeracije na kvalitet podzemnih voda za navodnjavanje

Volatility in agricultural production caused by the reliance on natural factors, and water is one of the basic, which provides greater production. Volatility in agricultural production caused by the reliance on natural factors, and water is one of the basic, which provides greater production. The authors in their professional praxis have seen that the presence and absence of vadose zone in the upper part of aquifer, with inter-granulary porosity type, is a prerequisite for enhanced concentrations of iron and manganese in groundwater. The natural aeration zone in vadose zone of the upper part of aquifer enables additional enrichment of groundwater with oxygen, which is spent on the account of biochemical processes in the direction of their flow. The absence of this zone in aquifer directly influences higher iron and manganese content in groundwater, often above the permissible concentration in drinking water. In order to eliminate this problem, in this paper proposal of future works were made, different of the usual procedure of hydro geological research. It will be possible to examine the effect of aeration of groundwater in the aquifer, during the preparation of wells from which to irrigate the land. .Nestabilnost poljoprivredne proizvodnje uslovljena je oslanjanjem na prirodne faktore, a voda je jedan od osnovnih koji obezbeđuje veću proizvodnju. Ulaganja u sisteme za navodnjavanje su neophodna, ali uz konstantna tehnološka poboljšanja i ekonomsku ocenu investicije. U praksi je dokazano da je prisustvo i odsustvu vadosa zona u gornjem delu izdani, sa intergranularim tipom poroznosti, preduslov za pojavu povećane koncentracije jona gvožđa i mangana u podzemnim vodama. Prirodna aeracija oblasti u vadosa zoni u gornjem delu izdani omogućava dodatno obogaćivanje podzemnih voda sa kiseonikom, koje se izvodi na račun biohemijskih procesa u njima. Odsustvo ove zone u akviferu direktno utiče na veći sadržaj gvožđa i mangana u podzemnim vodama, često iznad dozvoljene koncentracije u vodi za piće što će imati negativno dejstvo prilikom navodnjavanja površina. Kako bi se u budućnosti eliminisao ovaj problem u radu su date preporuke, promene uobičajene procedure hidrogeoloških istraživanja, da se sagleda efekat aeracije vode u akviferu, tokom pripreme bunara iz kojih će se navodnjavati zemljište.

EFFECTS OF AERATION ON GROUNDWATER QUALITY FOR IRRIGATION

Volatility in agricultural production caused by the reliance on natural factors, and water is one of the basic, which provides greater production. Volatility in agricultural production caused by the reliance on natural factors, and water is one of the basic, which provides greater production. The authors in their professional praxis have seen that the presence and absence of vadose zone in the upper part of aquifer, with inter-granulary porosity type, is a prerequisite for enhanced concentrations of iron and manganese in groundwater. The natural aeration zone in vadose zone of the upper part of aquifer enables additional enrichment of groundwater with oxygen, which is spent on the account of biochemical processes in the direction of their flow. The absence of this zone in aquifer directly influences higher iron and manganese content in groundwater, often above the permissible concentration in drinking water. In order to eliminate this problem, in this paper proposal of future works were made, different of the usual procedure of hydro geological research. It will be possible to examine the effect of aeration of groundwater in the aquifer, during the preparation of wells from which to irrigate the land

The quality of coal and hydrogeological characteristics in deposit 'Delići and Peljave-Tobut' near Ugljevik

Geological study of 'Delici and Peljave - Tobut' coal deposit, located in north-eastern part of the Republic of Srpska (B&H), has given a new insight into geological structure of coal-bearing series and quality of coal. Coal-bearing series was formed in a lower Miocene lake and has complex geological-tectonic structure and litho-facial diversity. Two coal seam are identified within this series - the older one, so-called the Main coal seam (developed throughout the deposit; with major coal reserves) and the younger one - Upper coal seam, which is of a restricted areal extent. Coal from this deposit has a variable ash content -34.91% on average in the Main seam and 44.58% on average in the Upper seam. This coal has an average sulfur content of 3.73% in the Main seam and 2.73% in the Upper seam. An average moisture content is 19.07% in the Main seam and 18.26% in the Upper seam. An average lower heating value is 111.671 kJ/kg for the Main seam and 7.952 kJ/kg for the Upper seam. Petrographic study of coal have shown that the coal of this deposit has high content of huminite, increased content of liptinite, low content of inertinite and increased content of mineral matter. Densinite is a dominant maceral of huminite group, while ulminite is less abundant. The content of other macerals of this group is low