The effect of natural organic matter (NOM) on the distribution and resources of mobile phosphorus in the bottom sediments of small retention reservoirs

Abstract The purpose of the work detailed here was to determine impact distribution natural organic matter and grain size on resources mobile phosphorus in bottom sediments small reservoirs located catchments subject different levels anthropopressure. research objects were five southeast Poland. In retention reservoirs, it is anthropogenic catchment its geological structure, a lesser extent sediment granulation, that fractions (especially inorganic compounds) share total P they account for. general, higher level contamination with (OSI ON increase) shown be associated content fraction easily decomposable matter. Within under significant influence from catchment, sandy compared silty significantly less loaded potentially as well forms (sometimes) nitrogen. occurrence humic-metal-phosphate complexes determined by there being sufficient matter, especially humic fractions. Fractions compounds have terrigenous source these pollutants common. index can serve an adjunctive indicator which assess potential ability internal supply water column nutrients.