Potential Benefits of Managed Aquifer Recharge MAR on the Island of Gotland, Sweden
Artikel i vetenskaplig tidskrift, 2019

The Island of Gotland (3000 km2), east of mainland Sweden, suffers from insufficient water availability each summer. Thin soils and lack of coherent reservoirs in the sedimentary bedrock lead to limited reservoir capacity. The feasibility of Managed Aquifer Recharge (MAR) is explored by identifying suitable areas and estimating their possible contribution to an increased water availability. MAR is compared to alternative water management measures, e.g., increased groundwater abstraction, in terms of costs and water availability potential. Results from GIS analyses of infiltration areas and groundwater storage, respectively proximity to surface water sources and surface water storage were classified into three categories of MAR suitability. An area of ca 7700 ha (2.5% of Gotland) was found to have good local conditions for MAR and an area of ca 22,700 ha (7.5% of Gotland) was found to have moderate local conditions for MAR. These results reveal the MAR potential on Gotland. The water supply potential of MAR in existing well fields was estimated to be about 35% of the forecasted drinking water supply and 7% of the total water demand gap in year 2045. It is similar in costs and water supply potential to increased surface water extraction.

MAR

decision-support

mapping

Sweden

groundwater

Författare

Peter Dahlqvist

Sveriges Geologiska Undersökning (SGU)

Karin Sjöstrand

DRICKS Ramprogrammet för dricksvattenforskning vid Chalmers

Chalmers, Arkitektur och samhällsbyggnadsteknik, Geologi och geoteknik

Andreas Lindhe

DRICKS Ramprogrammet för dricksvattenforskning vid Chalmers

Chalmers, Arkitektur och samhällsbyggnadsteknik, Geologi och geoteknik

Lars Rosen

Chalmers, Arkitektur och samhällsbyggnadsteknik, Geologi och geoteknik

DRICKS Ramprogrammet för dricksvattenforskning vid Chalmers

Jakob Nisell

Sveriges Geologiska Undersökning (SGU)

Eva Hellstrand

Sveriges Geologiska Undersökning (SGU)

Björn Holgersson

Sveriges Geologiska Undersökning (SGU)

Water

0310-0367 (ISSN)

Vol. 11 10

Ämneskategorier

Vattenteknik

Oceanografi, hydrologi, vattenresurser

DOI

10.3390/w11102164

Mer information

Senast uppdaterat

2019-11-04