Citation:

tel-00909603

Name: Grain size distributions of Bossons stream sediment bedload (France) in 2011
Published: 2013
License: https://creativecommons.org/licenses/by/3.0/

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Coverage:

Latitude: 45.880000 * Longitude: 6.860000

Date/Time Start: 2011-06-28T17:25:00 * Date/Time End: 2011-08-08T10:50:00

Event(s):

Glacier_des_Bossons * Latitude: 45.880000 * Longitude: 6.860000 * Location: Bossons Glacier, Massif du Mont-Blanc, Haute-Savoie, France

Comment:

This dataset presents sediment load grain size distributions of Bossons stream, one of the subglacial stream draining Bossons glacier meltwater.

Bossons glacier is rapidly retreating and its proglacial area is deglaciated for ~30 years. Within this area, Bossons stream flows through an alluvial plain with day-to-day morphological changes. It is an intriguing location to study periglacial and proglacial erosion processes which requires to characterize transported sediments. Since coarse particles are difficult to monitor in such alpine stream environment, this dataset focuses on fine grained particles in suspension load, saltation load 5 cm from bed and bedload.

Sediment trap for bedload was constituted by a 235x240 mm landing net with 3 mm mesh. Behind this net, a non-woven geotextile with a 0.1 mm mesh was set. Coarse particles were trapped in the first net whereas fine particles were sampled in the geotextile. This sampling system was installed on a wear and was able to monitor about one tenth of the stream width. Sampling was carried out in different hydrological conditions during 22 days from June to August 2011 totaling 92 samples.

After decantation, drying and weighting, Grain Size Distribution (GSD) of each samples has been determined by laser micro-granulometry. Some sample were analyzed twice to ensure data consistency. Only 12 bedload samples have been analyzed.

Bedload particles GSD is slightly bimodal: a clear and dominant mode at 528±84 µm and a less prominent one between 5 and 8 mm. Hence, on normal hydrological condition, suspended load, saltating load and bedload correspond respectively to silts, medium to coarse sands and medium to coarse sands together with granular gravels.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DATE/TIME	Date/Time				Geocode
2	Date/time end	Date/time end		Guillon, Hervé
3	Size fraction 0.025-0.020 µm	0.025-0.02 µm	%	Guillon, Hervé	Laser micro-granulometry
4	Size fraction 0.0315-0.025 µm	0.0315-0.025 µm	%	Guillon, Hervé	Laser micro-granulometry
5	Size fraction 0.040-0.0315 µm	0.04-0.0315 µm	%	Guillon, Hervé	Laser micro-granulometry
6	Size fraction 0.050-0.040 µm	0.05-0.04 µm	%	Guillon, Hervé	Laser micro-granulometry
7	Size fraction 0.063-0.050 µm	0.063-0.05 µm	%	Guillon, Hervé	Laser micro-granulometry
8	Size fraction 0.080-0.063 µm	0.08-0.063 µm	%	Guillon, Hervé	Laser micro-granulometry
9	Size fraction 0.100-0.080 µm	0.1-0.08 µm	%	Guillon, Hervé	Laser micro-granulometry
10	Size fraction 0.125-0.100 µm	0.125-0.1 µm	%	Guillon, Hervé	Laser micro-granulometry
11	Size fraction 0.160-0.125 µm	0.16-0.125 µm	%	Guillon, Hervé	Laser micro-granulometry
12	Size fraction 0.200-0.160 µm	0.2-0.16 µm	%	Guillon, Hervé	Laser micro-granulometry
13	Size fraction 0.250-0.200 µm	0.25-0.2 µm	%	Guillon, Hervé	Laser micro-granulometry
14	Size fraction 0.315-0.250 µm	0.315-0.25 µm	%	Guillon, Hervé	Laser micro-granulometry
15	Size fraction 0.400-0.315 µm	0.400-0.315 µm	%	Guillon, Hervé	Laser micro-granulometry
16	Size fraction 0.500-0.400 µm	0.5-0.4 µm	%	Guillon, Hervé	Laser micro-granulometry
17	Size fraction 0.630-0.500 µm	0.630-0.500 µm	%	Guillon, Hervé	Laser micro-granulometry
18	Size fraction 0.800-0.630 µm	0.8-0.63 µm	%	Guillon, Hervé	Laser micro-granulometry
19	Size fraction 1.000-0.800 µm	1-0.8 µm	%	Guillon, Hervé	Laser micro-granulometry
20	Size fraction 1.250-1.000 µm	1.25-1 µm	%	Guillon, Hervé	Laser micro-granulometry
21	Size fraction 1.6-1.25 µm	1.6-1.25 µm	%	Guillon, Hervé	Laser micro-granulometry
22	Size fraction 2.0-1.6 µm	2.0-1.6 µm	%	Guillon, Hervé	Laser micro-granulometry
23	Size fraction 0.0025-0.002 mm	2.5-2 µm	%	Guillon, Hervé	Laser micro-granulometry
24	Size fraction 3.15-2.5 µm	3.15-2.5 µm	%	Guillon, Hervé	Laser micro-granulometry
25	Size fraction 4.0-3.15 µm	4-3.15 µm	%	Guillon, Hervé	Laser micro-granulometry
26	Size fraction 0.005-0.004 mm	5-4 µm	%	Guillon, Hervé	Laser micro-granulometry
27	Size fraction 0.0063-0.005 mm	6.3-5 µm	%	Guillon, Hervé	Laser micro-granulometry
28	Size fraction 0.008-0.0063 mm	8-6.3 µm	%	Guillon, Hervé	Laser micro-granulometry
29	Size fraction 0.010-0.008 mm	10-8 µm	%	Guillon, Hervé	Laser micro-granulometry
30	Size fraction 12.5-10.0 µm	12.5-10 µm	%	Guillon, Hervé	Laser micro-granulometry
31	Size fraction 16.0-12.5 µm	16-12.5 µm	%	Guillon, Hervé	Laser micro-granulometry
32	Size fraction 20-16 µm	20-16 µm	%	Guillon, Hervé	Laser micro-granulometry
33	Size fraction 25-20 µm	25-20 µm	%	Guillon, Hervé	Laser micro-granulometry
34	Size fraction 31.5-25 µm	31.5-25 µm	%	Guillon, Hervé	Laser micro-granulometry
35	Size fraction 40-31.5 µm	40-31.5 µm	%	Guillon, Hervé	Laser micro-granulometry
36	Size fraction 0.050-0.040 mm	50-40 µm	%	Guillon, Hervé	Laser micro-granulometry
37	Size fraction 0.063-0.050 mm	63-50 µm	%	Guillon, Hervé	Laser micro-granulometry
38	Size fraction 0.080-0.063 mm	80-63 µm	%	Guillon, Hervé	Laser micro-granulometry
39	Size fraction 0.100-0.080 mm	100-80 µm	%	Guillon, Hervé	Laser micro-granulometry
40	Size fraction 0.125-0.100 mm	125-100 µm	%	Guillon, Hervé	Laser micro-granulometry
41	Size fraction 0.160-0.125 mm	160-125 µm	%	Guillon, Hervé	Laser micro-granulometry
42	Size fraction 0.200-0.160 mm	200-160 µm	%	Guillon, Hervé	Laser micro-granulometry
43	Size fraction 0.250-0.200 mm	250-200 µm	%	Guillon, Hervé	Laser micro-granulometry
44	Size fraction 0.315-0.250 mm	315-250 µm	%	Guillon, Hervé	Laser micro-granulometry
45	Size fraction 0.400-0.315 mm	400-315 µm	%	Guillon, Hervé	Laser micro-granulometry
46	Size fraction 0.500-0.400 mm	500-400 µm	%	Guillon, Hervé	Laser micro-granulometry
47	Size fraction 0.630-0.500 mm	630-500 µm	%	Guillon, Hervé	Laser micro-granulometry
48	Size fraction 0.800-0.630 mm	800-630 µm	%	Guillon, Hervé	Laser micro-granulometry
49	Size fraction 1.000-0.800 mm	1-0.8 mm	%	Guillon, Hervé	Laser micro-granulometry
50	Size fraction 1.250-1.000 mm	1.25-1 mm	%	Guillon, Hervé	Laser micro-granulometry
51	Size fraction 1.600-1.250 mm	1.6-1.25 mm	%	Guillon, Hervé	Laser micro-granulometry
52	Size fraction 2.0-1.6 mm	2.0-1.6 mm	%	Guillon, Hervé	Laser micro-granulometry

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

612 data points

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