A modification of the HBV model for assessing phosphorus transport from a drainage area

The aim of the study was to develop a method for assessing phosphorus transport from a large drainage basin. A tentative conceptual model of watershed dynamics was developed consisting of two components: a runoff model and a phosphorus transport model. A similar approach has also been used in previo...

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Bibliographic Details
Published in:Water science and technology 1994-01, Vol.30 (7), p.179-182
Main Authors: Bilaletdin, Ämer, Kallio, Kari, Frisk, Tom, Vehviläinen, Bertel, Huttunen, Markus, Roos, Jaana
Format: Article
Language:English
Subjects:
Agricultural management
Agricultural runoff
Agriculture
Calibration
Computer simulation
Correlation coefficient
Correlation coefficients
Discharge
Drainage
Drainage area
Drainage basins
Dynamics
Freshwater
Lakes
Mathematical models
Phosphorus
Q1
Runoff
Statistical analysis
Transport
Water levels
Watersheds
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Summary:The aim of the study was to develop a method for assessing phosphorus transport from a large drainage basin. A tentative conceptual model of watershed dynamics was developed consisting of two components: a runoff model and a phosphorus transport model. A similar approach has also been used in previous studies (e.g. Kallio 1992). As the runoff model, a modification of the HBV-model (Vehviläinen 1992) was used. The statistical P transport model was developed in this study. The models were tested against the data of eight subcatchments of the watercourse of Lake Längelmävesi, central Finland. Runoff calibration was made against total discharges, though in the output data the runoff from forested and agricultural areas were presented separately. A good fit was obtained, the correlation coefficient squared R2 against water level being 0.964. The calibration against total phosphorus transport was made using simulated discharge values. In the present version the correlation coefficient squared R2 was 0.901.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.1994.0338