Contribution of glacier melt to stream runoff:: if the climatically extreme summer of 2003 had happened in 1979 ...

被引：19

作者：

Koboltschnig, Gernot R. ^{[1
,2
]}

Schoener, Wolfgang ^{[3
]}

Zappa, Massimiliano ^{[4
]}

Holzmann, Hubert ^{[1
]}

机构：

[1] Univ Natl Resources & Appl Life Sci BOKU, Muthgasse 18, A-1190 Vienna, Austria

[2] Int Res Soc INTERPRAEVENT, A-9021 Klagenfurt, Austria

[3] Cent Inst Meteorol & Geodynam ZAMG, A-1190 Vienna, Austria

[4] Swiss Fed Inst Forest Snow & Landscape Res WSL, CH-8903 Birmensdorf, Switzerland

来源：

ANNALS OF GLACIOLOGY, VOL 46, 2007 | 2007年 / 46卷

关键词：

D O I：

10.3189/172756407782871260

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This paper presents a comparative study at a small and highly glacierized catchment area in the Austrian Alps, where runoff under the extreme hot and dry conditions of summer 2003 was simulated based on two different glacier extents: the 2003 glacier extent and the 29% larger 1979 extent. Runoff was simulated applying the hydrological water balance model PREVAH at a high temporal resolution. For this purpose, the catchment area was subdivided into hydrological response units based on digital elevation model and land-cover data. The model was driven by meteorological data from the observatory at Hoher Sonnblick, situated at the highest point of the catchment area (3106 m a.s.l.). We were interested in the effect the change in glacier extent would have on the annual and monthly water balance and the hydrograph of hourly discharges. Results of the 2003 and the hypothetical 1979 simulation show main differences in runoff for the period July-August depending on a higher ice-melt contribution. Due to the same meteorological input, both simulations calculate the same snow accumulation and snowmelt. Annual discharge in 1979 would have been 12% higher and hourly runoff up to 35% higher than in 2003.

引用

页码：303 / +

页数：3