Evolution of the internal drainage system in the lower part of the ablation area of Storglaci?ären, Sweden

1993 ◽  
Vol 105 (4) ◽  
pp. 537-546 ◽  
Author(s):  
REGINE HOCK ◽  
ROGER LEB. HOOKE
Keyword(s):  
Drainage System ◽  
Internal Drainage ◽  
Ablation Area

scholarly journals Seasonal Variation of Drainage System in the Lower Ablation Area of a Monsoonal Temperate Debris-Covered Glacier in Mt. Gongga, South-Eastern Tibet

Water ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 1050 ◽  
Author(s):  
Qiao Liu ◽  
Shiyin Liu ◽  
Wulong Cao
Keyword(s):  
Seasonal Variation ◽  
Dispersion Model ◽  
Drainage System ◽  
Hydrodynamic Dispersion ◽  
Ablation Area ◽  
Advection Dispersion ◽  
Dye Tracer ◽  
Eastern Tibet ◽  
Glacier Ice ◽  
Subglacial Drainage

Seasonal evolution of the subglacial drainage system in the lower ablation area of the Hailuogou glacier ice tongue were revealed by repeated dye tracer (Rhodamine WT) experiments during the 2009 ablation season. Between April and October, 18 dye tracer experiments were conducted by injecting the tracer at one location of the lower ablation area of the Hailuogou Glacier to diagnose the seasonal variation of the subglacial drainage system of this section of glacier ice tongue. Using a simple advection-dispersion model (ADM), the flow velocity, hydrodynamic dispersion coefficient, and degree of tracer spreading were deduced. Tracer transit velocity through the tested subglacial channel varied from 0.148 to 0.555 m s−1 during the 2009 ablation season. Dispersivity showed a relatively high value than that found at other glaciers, which varied between 27.05 and 287.49 m2 s−1. Seasonal changes of these indexes indicated that the subglacial drainage system of the lower ablation area of the Hailougou Glacier is a relatively stable existing system in the case of its longitudinal shape, whereas its hydraulic efficiency is low in the early and late ablation seasons and high during the middle of summer due to subglacial channel expansion.

Research of Civil Air Defense Projects Biogas Purification Independent Drainage System

2012 ◽  
Vol 518-523 ◽  
pp. 3731-3734 ◽  
Author(s):  
Liang Chen ◽  
Chao Zhang ◽  
Shi Li Zhan
Keyword(s):  
Sewage Treatment ◽  
Drainage System ◽  
Economic Benefits ◽  
Internal Drainage ◽  
Poor Survival ◽  
Underground Engineering ◽  
Treatment Technology ◽  
Air Defense ◽  
Biogas Purification ◽  
Self Protection

The traditional drainage system of civil air defense projects is designed to discharge waste water directly to engineering external, depending on the external facilities of the project seriously, result in poor survival of the entire civil air defense in wartime. Through the engineering biogas tanks sewage treatment technology in underground engineering, independence of internal drainage system is greatly enhanced, the whole project’ self-protection and ability to substantially is greatly strengthened in wartime, then it will not only have good environmental and economic benefits, but also have a strong military benefits.

scholarly journals On the Water Channels of the Internal Drainage System of the Hintereisferner, Ötztal Alps, Austria

1975 ◽  
Vol 14 (72) ◽  
pp. 375-382 ◽  
Author(s):  
H. Behrens ◽  
H. Bergmann ◽  
H. Moser ◽  
W. Ambach ◽  
O. Jochum
Keyword(s):  
Average Velocity ◽  
Open Channel ◽  
Dispersion Coefficient ◽  
Drainage System ◽  
Water Channels ◽  
Internal Drainage ◽  
Run Off ◽  
Melt Water ◽  
Number Of Injections

Studies that had been started in 1971 were continued in the summer of 1972 in order to gather information on the intraglacial run-off system in the ablation region of Hintereisferner, In a long-term test of 30 h, the daily fluctuations of the inflow into a moulin and the discharge at the glacier mouth were measured. A number of injections of dye tracers were made to measure the curve of concentration versus time. Finally, a test was made to compare with last year's results, in which the inflow was marked with dye at three different points on the glacier. From the long-term measurements, the daily fluctuations of the average velocity of flow in the intraglacial run-off system and the dispersion coefficient were determined. The results confirm the experiments of last year, showing that the melt water reaches the glacier bed taking the shortest possible route without passing through cavities within the glacier, flowing mostly in an open channel.

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