Changes of total annual runoff distribution, high and low discharges in Latvian rivers

Apsīte, Elga; Bakute, Anda; Rudlapa, Ilze

doi:10.2478/v10046-010-0004-y

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…This trend in river runoff is already emerging under the present climate conditions. Apsīte et al (2009) concluded that over the period from 1988 to 2006, in comparison to the period from 1951 to 1987, no considerable changes in Latvian river runoff were observed in summer, whereas autumn runoff decreased by 3% on average, although this is not statistically significant at the moment. At the same time, major runoff differences are observed between winter (11% increase) and spring (8% decrease).…”

Section: Discussionmentioning

confidence: 92%

Climate change impacts on river runoff in Latvia

Apsīte¹,

Bakute²,

Elferts³

et al. 2011

Clim. Res.

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In order to assess climate change impacts on river runoff patterns at the end of this century, the hydrological model METQ2007BDOPT was applied to 8 river basins and sub-basins in Latvia, which is a part of the southeast Baltic Sea basin. The climate data we used originate from the PRUDENCE project and were prepared in a separate study. Changes in hydro-climate were analysed using one control run ) and 2 IPCC scenario runs (A2 and B2; 2071-2100). For the A2 scenario, both annual and seasonal analysis predicted the major significant changes in most cases. For both scenarios, an increase of the mean annual climate data (air temperature, precipitation and evapotranspiration) is forecast, whereas the mean annual river runoff is predicted to decrease. The seasonal runoff pattern is expected to change towards significantly higher runoff during winter, following a decrease in spring and autumn. Maximum river discharge will occur in winter instead of spring. No considerable change in streamflow is predicted for summer. Future climate will change, leading to modifications in the river runoff regime and the shape of the hydrograph, which will be similar to that of the present Western European rivers, i.e. 2 principal periods instead of 4: one with high flow, mostly falling in the cold period of the year; and one with low flow, mostly in the warm period.

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Section: Discussionmentioning

confidence: 92%

Climate change impacts on river runoff in Latvia

Apsīte¹,

Bakute²,

Elferts³

et al. 2011

Clim. Res.

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“…Analysis of 19 river basins in Latvia during 1951-2006 has shown a tendency towards a decrease in spring floods and an increase in winter flow, due to changes in SCD and snow amount (Apsīte et al 2009 Snow is a significant recreational attraction in the Baltic Sea area. In Estonia, various forms of winter recreation have become increasingly popular, and this has led to an increase in snow observations, made not only by scientists.…”

Section: Snow Cover Formation Duration and Meltmentioning

confidence: 99%

Recent Change—Terrestrial Cryosphere

Rasmus

Boelhouwers

Briede

et al. 2015

Regional Climate Studies

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This chapter compiles and assesses information on recent and current change within the terrestrial cryosphere of the Baltic Sea drainage basin. Findings are based on long-term observations. Snow cover extent (SCE), duration and amount have shown a widespread decrease although there is large interannual and regional variation. Few data are available on changes in snow structural properties. There is no evidence for a recent change in the frequency or severity of snow-related extreme events. There has been a decrease in glacier coverage in Sweden and glacier ice thickness in inland Scandinavia. The European permafrost is warming, and there has been a northward retreat of the southern boundary of near-surface permafrost in European Russia.Keywords seasonal snow cover Á glaciers Á seasonally frozen ground Á permafrost 6

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“…Recent studies of run-off in Latvia include those by Apsīte et al (2009Apsīte et al ( , 2013. The authors studied a 1951-2009 data series of twenty-five river hydrological stations.…”

Section: Latviamentioning

confidence: 99%

Recent Change—River Run-off and Ice Cover

Käyhkö

Apsīte

Bolek

et al. 2015

Regional Climate Studies

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This chapter compiles and assesses information on run-off and discharge from rivers within the Baltic Sea drainage basin. Some information is also available on ice duration on inland waterways. Although decadal and regional variability is large, no significant long-term change has been detected in total river run-off to the Baltic Sea over the past 500 years. A change in the timing of the spring flood has been observed due to changes in the timing of snowmelt. Change in temperature seems to explain change in run-off better than does precipitation. Later start dates for ice formation on waterways, and earlier ice break-up dates have resulted in shorter periods of ice cover. KeywordsBaltic sea Á Climate change Á River Á Run-off Á Discharge Á Ice cover IntroductionThis chapter compiles and assesses recent information on run-off and river discharge 1 within the Baltic Sea basin. Most of the information is based on peer-reviewed scientific publications, but a substantial share of the data has been provided by national authorities responsible for hydrological monitoring. Lake hydrology is not addressed in this chapter because widespread regulation for hydropower generation and the resulting complexity in lake level variation tend to hamper attempts to assess climatically induced change. Readers interested in the impact of climate change specifically on lakes are advised to refer to the European-scale review by Glen (2010 ) (allowing comparisons with precipitation and evaporation), whereas inflow and discharge typically refer to immediate channel flow and are given as cubic metres per second (m 3 s −1). Where possible, the terminology used in the original publications has been respected.

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Changes of total annual runoff distribution, high and low discharges in Latvian rivers

Cited by 4 publications

References 5 publications

Climate change impacts on river runoff in Latvia

Climate change impacts on river runoff in Latvia

Recent Change—Terrestrial Cryosphere

Recent Change—River Run-off and Ice Cover

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