scholarly journals Surface meltwater runoff routing through a coupled supraglacial-proglacial drainage system, Inglefield Land, northwest Greenland

2022 ◽  
Vol 106 ◽  
pp. 102647
Author(s):  
Ya Li ◽  
Kang Yang ◽  
Shuai Gao ◽  
Laurence C. Smith ◽  
Xavier Fettweis ◽  
...  
Keyword(s):  
Drainage System ◽  
Meltwater Runoff ◽  
Runoff Routing

scholarly journals Ice flow dynamics and surface meltwater flux at a land-terminating sector of the Greenland ice sheet

2013 ◽  
Vol 59 (216) ◽  
pp. 687-696 ◽  
Author(s):  
Andrew A.W. Fitzpatrick ◽  
Alun Hubbard ◽  
Ian Joughin ◽  
Duncan J. Quincey ◽  
Dirk Van As ◽  
...  
Keyword(s):  
Ice Sheet ◽  
Drainage System ◽  
Greenland Ice Sheet ◽  
Surface Flux ◽  
Flow Dynamics ◽  
Meltwater Runoff ◽  
Seasonal Flow ◽  
Hydrological System ◽  
Net Flux ◽  
Ice Sheet Dynamics

AbstractWe present satellite-derived velocity patterns for the two contrasting melt seasons of 2009–10 across Russell Glacier catchment, a western, land-terminating sector of the Greenland ice sheet which encompasses the K(angerlussuaq)-transect. Results highlight great spatial heterogeneity in flow, indicating that structural controls such as bedrock geometry govern ice discharge into individual outlet troughs. Results also reveal strong seasonal flow variability extending 57 km up-glacier to 1200 m elevation, with the largest acceleration (100% over 11 days) occurring within 10 km of the margin coincident with spring melt. By late July 2010, 2 weeks before peak melt and runoff, 48 % of the 2400 km2 catchment had slowed to less than the winter mean. This observation supports the hypothesis that the subglacial hydrological system evolves from an inefficient distributed to an efficient drainage system, regulating flow dynamics. Despite this, the cumulative surface flux over the record melt year of 2010 was still greater compared with the perturbation over the average melt year of 2009. This study supports the proposition that local surface meltwater runoff couples to basal hydrology driving ice-sheet dynamics, and although the effect is nonlinear, our observations indicate that greater meltwater runoff yields increased net flux over this sector of the ice sheet.

New strategies in stormwater-meltwater management in the city of Bergen, Norway

1999 ◽  
Vol 39 (2) ◽  
pp. 169-176 ◽  
Author(s):  
Sveinn T. Thorolfsson
Keyword(s):  
National Level ◽  
Water Environment ◽  
Drainage System ◽  
Combined Sewer Overflows ◽  
Meltwater Runoff ◽  
Local Politicians ◽  
High Standards ◽  
The City ◽  
New Strategies ◽  
Receiving Water

In the City of Bergen, Norway, extensive measures against point pollution sources are now to be implemented and to be finished before the end of year 2000, improving the receiving water conditions. Local politicians and public opinion support high standards of receiving water, even higher than the national level. Future improvements in the receiving water quality is planned through different measures aimed at reducing stormwater-meltwater runoff which causes surface pollution wash-off and combined sewer overflows. The city is now presenting a master plan for the water environment and urban runoff management. One of the main issues of the plan is measures for stormwater-meltwater quantity and quality problems. This paper describes the background for the plan and the reasons for introducing new strategies in integrated stormwater-meltwater management. The non-polluted stormwater-meltwater is to be handled near the source by percolation and/or detention. The polluted stormwater-meltwater is to be collected and conveyed to an appropriate site for treatment and discharge. The alternative drainage system named the Sandsli-system is described.

Stereological Analyses of Hepatocyte Ultrastructure Monitor Arsenic Liver Burdens

1980 ◽  
Vol 38 ◽  
pp. 442-443
Author(s):  
E. M. B. Sorensen ◽  
R. R. Mitchell ◽  
L. L. Graham
Keyword(s):  
Drainage System ◽  
Water Levels ◽  
Ultrastructural Changes ◽  
Hepatocyte Ultrastructure ◽  
Lepomis Cyanellus ◽  
Large Numbers ◽  
Activation Data ◽  
Water Analyses ◽  
Municipal Lake ◽  
Green Sunfish

Endemic freshwater teleosts were collected from a portion of the Navosota River drainage system which had been inadvertently contaminated with arsenic wastes from a firm manufacturing arsenical pesticides and herbicides. At the time of collection these fish were exposed to a concentration of 13.6 ppm arsenic in the water; levels ranged from 1.0 to 20.0 ppm during the four-month period prior. Scale annuli counts and prior water analyses indicated that these fish had been exposed for a lifetime. Neutron activation data showed that Lepomis cyanellus (green sunfish) had accumulated from 6.1 to 64.2 ppm arsenic in the liver, which is the major detoxification organ in arsenic poisoning. Examination of livers for ultrastructural changes revealed the presence of electron dense bodies and large numbers of autophagic vacuoles (AV) and necrotic bodies (NB) (1), as previously observed in this same species following laboratory exposures to sodium arsenate (2). In addition, abnormal lysosomes (AL), necrotic areas (NA), proliferated rough endoplasmic reticulum (RER), and fibrous bodies (FB) were observed. In order to assess whether the extent of these cellular changes was related to the concentration of arsenic in the liver, stereological measurements of the volume and surface densities of changes were compared with levels of arsenic in the livers of fish from both Municipal Lake and an area known to contain no detectable level of arsenic.

BIM-Based Automated Drainage System Design in Prefabrication Construction

2020 ◽  
Author(s):  
Nan Zhang ◽  
Yichen Tian ◽  
Jingwen Wang ◽  
Mohamed Al-Hussein
Keyword(s):  
System Design ◽  
Drainage System

Penentuan Metode Intensitas Hujan Berdasarkan Karakteristik Hujan dari Stasiun Pengamat Hujan Disekitar Kecamatan Karawang Timur

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Melisa Permatasari ◽  
M. Candra Nugraha ◽  
Etih Hartati
Keyword(s):  
Drainage System ◽  
Daily Rainfall ◽  
Intensity Analysis ◽  
Rain Intensity ◽  
Rainy Period ◽  
Discharge Plan ◽  
Calculation Results ◽  
Value Determination ◽  
Maximum Daily Rainfall ◽  
Method Approach

<p>The rain intensity is the high rainfall in unit of time. The length of rain will be reversed by the amount rain intensity. The shorter time the rain lasts, the greater of the intensity and re-period of its rain. The value of rain intensity is required to calculate the flood discharge plan on the drainage system planning area in East Karawang district. Determining the value rain intensity is required the maximum daily rainfall data obtained from the main observer stations in the Plawad station planning area. The method of determination rain intensity analysis can be done with three methods: Van Breen, Bell Tanimoto and Hasper der Weduwen. Selected method is based on the smallest deviation value. Determination deviation value is determined by comparing rain intensity value of Van Breen method, Bell Tanimoto, Hasper der Weduwen. By comparing rain intensity value of the Van Breen method, Bell Tanimoto, Hasper der Weduwen with the results of calculating three methods through the method approach Talbot, Sherman and Ishiguro. Calculation results show that the method of rain has smallest deviation standard is method Van Breen with Talbot approach for rainy period (PUH) 2, 5, 10, 25, 50 and 100 years.</p>

Hydrologic and hydraulic evaluation of drainage system in eastern Slovak Lowland

2012 ◽  
Vol 7 (3) ◽  
pp. 91-98 ◽  
Author(s):  
Zuzana Pálinkášová ◽  
Andrej Šoltész
Keyword(s):  
Drainage System

Nuovi dati sul popolamento nella pianura di Tarquinia durante la romanizzazione. Il caso della località "Il Giglio"

2008 ◽  
Vol 1 ◽  
pp. 123-135
Author(s):  
Maria Gabriella Scapaticci
Keyword(s):  
Middle Ages ◽  
Hydraulic System ◽  
Drainage System ◽  
Natural Fertility ◽  
Second Punic War ◽  
System Part ◽  
The Military ◽  
The Hill ◽  
Military Enterprise ◽  
The Middle Ages

During works for a communal athletic-ground at Tarquinia in the district “Il Giglio”, which took place between 2000 and 2001, some slight remains of ancient structures of the Late-Republican and Early-Imperial Age were accidentally discovered. The Soprintendenza per i Beni Archeologici dell’Etruria Meridionale then undertook extensive excavations, documenting a farm and an interesting hydraulic system, part of which had already been found not far from there, at Tarquinia in the district “Gabelletta”. The part of the plain of Tarquinia that is located at the foot of the hill, where Corneto was later established in the Middle Ages, was intensively cultivated with a drainage system and very extensive canalizations, because of the natural fertility of the soil and the richness of water-supplies in this region. It is thus likely that the flax for which Tarquinia was famous in antiquity was cultivated in these fields, and that, towards the end of the second Punic War, this farmland supplied Rome with the flax to make the sails destined for the military enterprise.

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