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Modelling the effects of wetland drainage on high flows
SMHI, Affärsverksamhet.
1993 (engelsk)Rapport (Annet vitenskapelig)
Abstract [en]

The effects of drainage on high flows hav~ been studied by means of a conceptual runoff

model (HBV/PULSE). To find parameters, typical for drained wetlands, the model was

calibrated for two small catchments, one in central Sweden and one in south eastem Finland,

where runoff data were available for drained and undrained conditions. The catchments had

different characteristics, and the calibration procedure yielded two different parameter sets.

The drainage effects in these small basins were studied by simulating the runoff, for a specific

period, using model parameters for drained and undrained conditions.

In the Swedish catchment,

the effects on the runoff were almost negligible.

In the Finnish catchment, the peak and

low flows, as well as the total runoff volume increased considerably during the first

10 years

after drainage.

The drainage parameters found for the small experimental basins, were also used to simulate

the drainage of a 1000 km

2 catchment in central Sweden, with a 20 % coverage of swamps.

Hard.ly any effects could be seen when the parameters from the small Swedish basin were

used. With the Finnish parameters there was a slight increase in peak and low flows, and the

total runoff volume increased by 3.5 %. When extreme flows were simulated, by entering a

design area rainf all sequence into the model, the diff erences between peak flows for drained

and undrained conditions were fully negligible.

sted, utgiver, år, opplag, sider
SMHI , 1993. , s. 36
Serie
RH, Rapport Hydrologi, ISSN 0283-1104 ; 8
Emneord [sv]
våtmarker, avrinning, modeller, flöden
HSV kategori
Forskningsprogram
Hydrologi
Identifikatorer
URN: urn:nbn:se:smhi:diva-2676Lokal ID: Hydrologi, Rapporter, Serie RHOAI: oai:DiVA.org:smhi-2676DiVA, id: diva2:947972
Tilgjengelig fra: 1993-09-17 Laget: 2016-07-08 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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