WIT Press

Variation Of Runoff And Nutrient Fluxes In An Agricultural Watershed: Influence Of Land Use Changes And Climatic Fluctuations

Price

Free (open access)

Paper DOI

10.2495/ECOSUD970191

Volume

22

Pages

10

Published

1997

Size

1,078 kb

Author(s)

Ulo Mander & Am Kull

Abstract

Results on the influence of land use and climatic changes on nutrient losses in the Porijogi River catchment, South Estonia, are presented. The main tendency in land-use changes is a significant increase in fallow lands and abandoned lands (from 1.7% in 1987 to 12.5% in 1994), and a decrease in arable lands (from 41.8 to 22.5%). In the long-term period (1951-94) significant climatic fluctuations can be observed. Warmer winters (increase from -7.9 to -5.8 °C during 1950-94) and changes in precipitation pattern have an influence on water discharge. This results in more intensive material flow during cold period and decreased water runoff in summer. Changes in water discharge and land use are

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