Jökull - 01.12.1966, Blaðsíða 82

27 h Jupiter (trawler) reports an iceberg at
6547/2653 drifting E-ward.
AUGUST 1966
Only some icebergs reported most.ly in the
Cape Horn area.
11 //s Cape horn 1200 z: A big iceberg 15—
20 miles NNE off the Lighthouse,
14/8 Snarfari (airplane) 1330 z: Two icebergs
sighted at 6620/2500. The third one ab. 20
miles west of Cape Horn.
14/8 Ship PFWG reports at 2400 z: Five big
icebergs 8 miles NNE of Cape Horn. Dangerous
for ships en route.
i7-3°/g ships report almost daily a big ice-
berg about 6647/2117 or 6630/2105 85° true
32 miles from Cape Horn. Probably grounded.
sl/s HerðubreiÖ M/s 0700 z: Two icebergs
sighted at 6635/2017 and 6629/2128.
SEPTEMBER 1966
Only a few icebergs reported in coastal wat-
ers.
1 /9 DBRC reports two icebergs in pos.
6710/2345 4 naut. miies apart. Numerous
growlers drifting SW. Water temp. 3.5° C.
2/g Three reports of a stranded iceberg at
ÓSinsboði.
?/» Árvakur M/B 0750: An iceberg within
Amdrupboði. Two smaller nearer to the coast.
Skriðskeri Slush Collector
Frarnh. af 229. bls. (Continued from p. 229)
og tíminn nái að vinna að söfnuninni, verða
afleiðingarnar vart ofmetnar að óreyndu, ísinn
er þá fljótur að hrannast upp, enda er hann
rúmmálsfrekur. Þegar áin hefur skorið sig nið-
Komið að landi með skriðskera.
Ljósrn. (Photo): Davíð Guðnason.
Slush Collector brought to the River Bank.
ur á ný, er eðlisþungi hinna frauðkenndu
hranna, sem eftir standa, nál. 0,6.
Skriðskera-mælingu má framkvæma með því
að vaða ána, vera í báti eða af brú. Hagkvæmt
er að vinna að mælingum frá palli, sem slakað
er frá brú og niður að vatnsfleti.
ABSTRACT
A method is described for measuring the
discharge of floating slush in rivers, i. e. the
amount of slush in kilograms passing a given
cross section per unit time. The measuremenl
is performed with a device known as slush
collector. It .consists of a rectangular frame of
flat steel bars. The frame is held perpendi-
cularily to the direction of flow. The upstream
edge of the frame is sharpened to ease he cutt-
ing of slush clusters. To the frame is fastened
a bag of nylon gaze which allows pure water
to pass through but retains the slush. The frame
is held against the slush flow for a certain time,
measured on a stop-watch, after which the de-
vice is lifted off the loater, excess water allowed
to drain off, and the sample weighed. The
frame width is selected according to the amount
of slush discharge. Large slush discharge re-
quires a narroiu frarne and vice versa. The
sampling is repeated at a suitable number of
points across the river.
To relate the slush discharge to total (ice +
water) discharge, the latter is assumed to be
determined from a near-by water gauge in the
normal fashion.
236 JÖKULL