Czynniki dostawy fosforu do wód powierzchniowych na Pogórzu Karpackim

FACTORS FOR PHOSPHORUS SUPPLY TO SURFACE WATERSIN THE CARPATHIAN FOOTHILLS

Summary: This work presents the findings of a study on factors and processes responsible for changes in phosphorus content in the small agricultural, foothill catchment of Dworski Potok. In periods of low flows, concentration of phosphorus was measured in the main creek, through-flow water and ground water represented by springs. In periods of high recharge, changes in phosphorus concentrations in the Dworski Potok were measured during a series of four high-flow periods. Monitoring was also conducted during two episodes of surface run-off from an intensively cultivated slope and of precipitation that had formed the peak flow. Also studied were the values of total phosphorus in suspension, in the creek-bed sediments, and in the soils of a research basin. Phosphorus concentrations in surface water during periods of medium and low flows are constant and are held in an equilibrium formed by the character of the water in the saturated zone, the vadose zone, and the creek-bed sediments. While analysing the peak flows, a strong dependence between phosphorus concentrations and amount of flow is seen. The study concludes that surface run-off is the main source of phosphorus in the stream during peak flow periods. Spatial variations in the phosphorus content in soil and sediments of the catchment correlate with the intensity of erosion. The most eroded areas are also the most depleted of phosphorus.

Słowa kluczowe: chemizm wód, fosfor w wodzie rzecznej, Pogórze Karpackie

Słowa kluczowe (w języku angielskim): water chemistry, phosphorus in stream water, Carpathian Foothills

Chełmicki W. (red.), 2001, Przemiany środowiska na Pogórzu Karpackim, t. 1, IGiGP UJ Kraków, s. 65-82.

Instytut Geografii i Gospodarki Przestrzennej UJ

ISBN 83-88424-05-X

Pełny tekst (837 KB)