File:Bras de l'Authie juste en amont du Moulin d'Argoules 09 aout 2017a 03.jpg
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[edit]DescriptionBras de l'Authie juste en amont du Moulin d'Argoules 09 aout 2017a 03.jpg |
Français : zone d'eau laiteuse sur fond de vase avec biofilm bactérien léger dans l'un des Bras de l'Authie juste en amont du Moulin d'Argoules le 09 aout 2017. La Flore subaquatique cet ancien bras d'alimentation du moulin (ici après arasement du barrage qui maintenait ce bras en eau) est localement dégradée ou comme ici couverte de dépôt de sédiment. à quelques dizaines de mètres en aval de ce point, Mi-aout 2017, malgré 3 semaines inhabituellement fraiches et pluvieuses, au niveau de l'accès à l'ancienne roue du moulin, il ne reste qu'un filet d'eau (quelques cm de profondeur dans un caniveau récemment construit). Le niveau d'eau de ce bras a considérablement baissé. Après de point et jusqu'au moulin une grande partie de ce bras est sous le feuillage des arbres des berges. L'ombre y limite l'évaporation, mais les racines des arbres prélèvent de l'eau et en été (en 2017) l'eau l'eau qui y reste s'y réchauffe dans les taches de soleil et semble mal oxygénée. Au moment de la photo, en aout 2017 l'eau de ce bras parait localement "laiteuse" alors qu'elle est cristalline partout en amont (et en aval). Le fond de ce bras est couvert de vase brune dont la surface est localement couverte d'un biofim algual brun ou colonisé par des touffes d'algues filamenteuses vertes dont certaines semblent "roussies" (mais vivantes), elles mêmes couvertes d'un biofilm ou dépôt algobactérien (périphyton). Remarque : cet aspect dégradé est peut-être transitoire car au moins en partie causé par les travaux récents de démantèlement et réaménagement pour la continuité piscicole. |
Date | |
Source | Own work |
Author | Lamiot |
Camera location | 50° 20′ 41.13″ N, 1° 49′ 55.36″ E | View this and other nearby images on: OpenStreetMap | 50.344758; 1.832045 |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 20:23, 15 August 2017 | 4,608 × 2,296 (1.59 MB) | Lamiot (talk | contribs) | User created page with UploadWizard |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON CORPORATION |
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Camera model | COOLPIX W300 |
Exposure time | 1/250 sec (0.004) |
F-number | f/2.8 |
ISO speed rating | 125 |
Date and time of data generation | 15:54, 9 August 2017 |
Lens focal length | 4.3 mm |
Latitude | 50° 20′ 41.13″ N |
Longitude | 1° 49′ 55.36″ E |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop Elements 8.0 Windows |
File change date and time | 09:28, 10 August 2017 |
Y and C positioning | Centered |
Exposure Program | Normal program |
Exif version | 2.31 |
Date and time of digitizing | 15:54, 9 August 2017 |
Meaning of each component |
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Image compression mode | 2 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 24 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
GPS time (atomic clock) | 13:54 |
Satellites used for measurement | 15 |
Reference for direction of image | True direction |
Direction of image | 359.2 |
Geodetic survey data used | WGS84 |
GPS date | 9 August 2017 |
GPS tag version | 0.0.3.2 |
Supported Flashpix version | 1 |
Image width | 4,608 px |
Image height | 2,296 px |
Date metadata was last modified | 11:28, 10 August 2017 |
Unique ID of original document | xmp.did:599709789D7DE711AE41A5DAE6FCF474 |
IIM version | 13,546 |