SINOTROPIA WP2: Catchment processes - the influence of land-use and climate on nutrient fluxes into aquatic systems

In Charge: Prof. Vogt and PhD cand. Engebretsen (UiO-Chem) in cooperation with RCEES (Dr. Tian) and TAES (Dr. Lu)

Conceptual model of P mobilization and transport processes from soils

  • Biogeochemical processes governing the nutrient flux from the soil to soil water will be studied on plot scales. Data on deposition and soil water chemistry from genetic horizons incl. ground water along topographic gradients in the sub-catchments will be assessed. The relationship between soil pools and P fractions in solution will be studied in terms of hydro-biogeochemical processes governing the mobilization of P in relation to soil characteristics and overall soil water chemistry using multivariate statistics.

 

  • Mobilization and fluxes of bio-relevant nutrient fractions will be studied through a regional survey to identify hotspots and preferential hydrological flow-paths governing the mobilization of nutrients from the terrestrial to the aquatic environment by means of End Member Mixing Analysis

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  • Process oriented studies of monitoring data will be used to identify conceptual based and empirically founded relationships between environmental pressures and changes to the levels of bio-available nutrient species in the lake. Speciation will be conducted with MINEQL+.

 

  • Episode studies of discharge and hydrochemistry data will be studied to validate model hypotheses of transport processes and link between hydrological and chemical outwash processes.

 

  • Comparative study between Western Vansjø in Norway and Yuqiao reservoir.
By Rolf D. Vogt
Published July 13, 2011 4:40 PM - Last modified Oct. 9, 2012 9:54 AM