Review article

https://doi.org/10.33128/ag.81.3.4

SENSITIVITY OF AGRICULTURAL SOIL TO LEACHING OF POLLUTANTS, VULNERABILITY OF GROUND WATER TO POLLUTION AND NITRATES IN DRAVA-PLITVICA LOWLAND OF VARAŽDIN COUNTY

Željko Vidaček orcid.org/0000-0002-6315-8513 ; Zagreb, Hrvatska
Mladen Plantak ; Elektroprojekt d.d., A. von Humboldta 4, Zagreb

Abstract

In the Dravsko-Plitvice alluvial plain of around 26,594 hectares of Varaždin County, dominated arable land. Out of that, as much as 1,103 hectares are neglected. Agricultural land is on automorphic anthropogenised and hydromorphic partly hydromeliterated soils. Automorphic soils are moistened by very fast percolated precipitation. The hydromorphic soils are moistened by surface water of varying percolation rate and / or groundwater of different depths. In the large areas of the upper and middle stream of the river Plitvice, are very poorly sensitive agricultural soils on the leaching of pollutants (Class I). Poor agricultural soil classes sensitive to leaching of pollutants (class II) and moderately sensitive agricultural soil (class III), dominate in the eastern part of the Plitvice river alluvial plains. In the north-west are predominantly agricultural soils of moderate (class III) and strong (class IV) sensitivity to leaching of pollutants, Figure 1 and Table 2. Groundwater in the alluvial aquifer of the Drava-Plitvica plain is severely vulnerable to nitrate pollution. In the four-year study period of the Bartolovec and Nova Ves control fields, the highest one-off concentration of nitrate in the leached water from gravitational lysimeters was 314.5 mg NO3-/l or ammonium nitrogen 3.8 mg NH4+/ l. In leached water from tensiometric lysimeters, the highest nitrate was 338.5 mg NO3-/l and 3.0 ammonia nitrogen, Tables 7-10.

Keywords

agricultural soil; groundwater; sensitivity to pollution; mineral nitrates

Hrčak ID:

232620

URI

https://hrcak.srce.hr/232620

Publication date:

15.1.2020.

Article data in other languages: croatian

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