The impact of agricultural production on the groundwater quality in the Biđ-bosut field in period 2016.-2018.

Povećanje poljoprivredne proizvodnje i primjena agrotehničkih mjera doveli su do negativnih okolišnih posljedica: javljaju se problemi vezani uz eroziju tla, dolazi do smanjenja biološke raznolikosti, onečišćenja tla i voda. Za monitoring podzemnih voda koriste se piezometri koji se lociraju na potencijalno ranjivim područjima i omogućuju motrenje razine podzemne vode i prikupljanje uzoraka za određivanje kakvoće. Agrokemikalije, posebice dušična gnojiva predstavljaju najveću opasnost od onečišćenja podzemnih voda na poljoprivrednim prostorima. Terensko istraživanje je postavljeno na području Biđ-Bosutskog polja gdje su na 35 lokacija postavljeni piezometri. Kakvoća podzemne vode u pokrovnom (talnom) dijelu profila praćena je na dubokim (4 m dubine) hidropedološkim piezometrima i na 5 hidrogeoloških piezometara (15 m dubine). Uzorci podzemne vode prikupljeni su svakih 60 dana i dostavljeni u laboratorij Zavoda za melioracije i analizirani na dušične spojeve: NO3-N i NH4-N i fosfate PO4-P. Spojevi su određeni spektrofotometrijski primjenom metode segmentiranog protoka na ionskom analizatoru vode. Na navedenom području analizirala se kakvoća podzemne vode obzirom na Pravilnik o zdravstvenoj ispravnosti vode za piće. U radu su se koristili podaci prikupljeni tijekom razdoblja 2016.- 2018. godine. Tijekom promatranog razdoblja bilježe se povećane koncentracije amonijaka i fosfata u dubokom akviferu. Koncentracije nitrata više od propisane dopuštene koncentracije zabilježene su u plitkom akviferu, ali ne i u dubokom. Uočena je povezanost količine oborina s povećanjem koncentracije dušičnih spojeva i fosfata u podzemnoj vodi.Increased agricultural production and the application of agro-technical measures have led to negative environmental consequences: problem related to soil erosion, reduction in biodiversity, soil and water pollution. Piezometers are used for groundwater monitoring which are located in potentially vulnerable areas and enable monitoring of groundwater levels and collection of samples for quality determination. Agrochemicals, especially nitrogen fertilizers, pose the greatest risk of groundwater pollution in agricultural areas. Field research was set up in the area of Biđ-Bosut field where piezometers were installed at 35 locations. Groundwater quality in the upper soil profile was monitored by deep (4 m depth) hydropedological piezometers and 5 hydrogeological piezometers (15 m deep). Groundwater samples were collected every 60 days and delivered to the laboratory of the Department of Soil Amelioration and analyzed for nitrogen compounds: NO3-N and NH4-N and phosphates PO4-P. Compounds were determined spectrophotometrically using the segmented flow method on a water ion analyzer. The thesis use data collected during the period 2016 - 2018. During the observed period, increased concentrations of ammonia and phosphate were recorded in the deep aquifer. Nitrate concentrations higher than the prescribed concentration were recorded in a shallow aquifer but not in a deep aquifer. The connection of precipitation variability with an increase in the concentration of nitrogen compounds and phosphates in groundwater was observed