The Water Balance of a Small Pond in the High Arctic
ABSTRACT. Tundra ponds are ubiquitous features in the High Arctic. The water balance of one such pond situated on Ellesmere Island w a s found to be dependent upon the groundwater supplies from the internally-drained basin in which it was located. For the basin as a whole, evaporation constituted an...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.527.1692 http://pubs.aina.ucalgary.ca/arctic/Arctic30-2-109.pdf |
| Summary: | ABSTRACT. Tundra ponds are ubiquitous features in the High Arctic. The water balance of one such pond situated on Ellesmere Island w a s found to be dependent upon the groundwater supplies from the internally-drained basin in which it was located. For the basin as a whole, evaporation constituted an important component of the water balance, accounting for over 90 per-cent of the rainfall over a summer period of less than six weeks. Changes occumng in the quantity of water in the pond in response to rainfall were found to depend upon the degree of saturation of the active layer of the underlying permafrost. RfiSUMfi. Equilibre hydrologique d'un petit étang dans le Haut Arctique. Les 6tangs de toundras sont une particularit6 omniprknte du Haut Arctique. On constata que l'huilibre hydrologique d'un tel ktang, situ6 sur l'île Ellesmere, &ait tributaire de l'apport en eau souterraine venant du bassin, drain6 inthieurement, dans lequel il est situ6. En ce qui concerne le bassin dans son ensemble, l'6vapora-tion constituait un facteur important de son &luilibre hydrologique, 6tant ii l'origine de plus de 90 % des chutes de pIuie constat & sur une p6riode d'et6 inf6rieure ii six semaines. On constata que les variations de la quantité d'eau dans l'ktang, en r6ponse aux chutes de pluie, d6pendait du degr6 de la saturation de la couche active du pergaisol sous-jacent. |
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