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hIi

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j"k lIk)m nPoqp&rts&ru8n>o)uv/w>r,x$ozym|{~}0p€Kw>n 

400 

5 

Surface (m2) 

350 

300 

250 

200 

150 

100 

50 

Rayon Hydraulique (m) 

4.5 

4 

3.5 

3 

2.5 

2 

1.5 

1 

0.5 

0 

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 

Hauteur (m) 

0 

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 

Hauteur (m) 

ŒŽ Ž‘q’“ ”)• 

Dans le cas de l’Isère, la corrélation relevée 

à partir des données de jaugeages permettent d’établir 

la relation surface-hauteur : 

. 

ŒŽ Ž‘†’“¦§• 

Dans le cas de l’Isère, la corrélation relevée 

à partir des données de jaugeages permettent d’établir 

la relation rayon hydraulique-hauteur : 

. 

¨B© —˜š ›«ªž Ÿt¡¬B¢˜8£ª"ž®[¬,¯ 

–—Ãš|›Dœ\ž Ÿ¡ ¡¢[˜Ž£¥¤"ž Ÿ¡ \¤ 

Ln(Q/A) 

0.8 

0.7 

0.6 

0.5 

0.4 

0.3 

0.2 

0.1 

0 

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 

Ln(Rh) 

Debit (m3/s) 

1200 

1100 

1000 

900 

800 

700 

600 

500 

400 

300 

200 

100 

0 

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 

Hauteur (m) 

ŒŽ Ž‘’“°±• 

Dans le cas de l’Isère, relation établie à partir 

de jaugeages et des relations précédentes : 

– 

²´³/µ 

›Dªž 6¬\¯¢·Ķ— ¨ © š¥£¥ª"ž ª¡¬\¤ 

. 

ŒŽ Ž‘¥’“¹º• 

Comparaison entre la courbe de tarage 

(courbe pleine) de la station reconstruite à partir des 

seules données de TP et celle établie par le Pr Bois hydrologue 

responsable de la station (courbe pointillée). 

1200 

1100 

1000 

900 

20 

15 

10 

Debit (m3/s) 

800 

700 

600 

500 

400 

% 

5 

0 

-5 

300 

-10 

200 

100 

-15 

0 

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 

Hauteur(m) 

-20 

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 

Hauteur(m) 

ŒŽ Ž‘Ž’“»D• 

Les jaugeages faits sur l’Isère au saumon 

(les croix) et la courbe de tarage (trait plein). Les pointillés 

fins indique une erreur de ¬ ¼ sur la courbe de tarage 

et les pointillés larges de ®Tª¼ . 

ŒŽ Ž‘½’“¾z• 

Les écarts sur les jaugeages faits par rapport 

à la courbe de tarage. Les mesures sont très fidèles 

avec une dispersion inférieure à ®ª&¼ . 

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Présentation d’un essai ADCP de la société RDI et du logiciel WinRiver sur l’Isère avec 5 allers-retours. 

Le graphique en haut à gauche donne la répartition des vitesses dans la rivière, celui en bas à gauche donne le 

chemin parcouru par l’ADCP en rouge et l’orientation des vitesses mesurées en bleu. 

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heures. 

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L’intervention de L.M. Daguerre permet 

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Les frères Lumière inventent le procédé 

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4 

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Windows, par un lecteur de carte USB. Le réseau interne du laboratoire permet de transférer cette image (étape 3) sur 

les plateformes Linux, sur lesquelles sont développées les algorithmes en language C. Finalement, le calcul permet 

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Réglages 

Exploitation 

Attente de crues 

Oct Nov Déc Jan Fév Mar Avr Mai Jui Jui Aou Sep Oct Nov 

Temps 

14/10/03 

30/11/04 

822 Images 

15,705 Images de travail 

8 non prises 

216 mémoire pleine 

134 batterie 

36 décalage horloge 

394 Images perdues 

1003 Images 

1900 Images perdues 

ÑÉÒÔÓÉÕ {‚ŽntLÏ 

Le prototype installé a fonctionné pendant un an avec trois périodes : en gris les essais et réglages des 

images, en blanc la période de fonctionnement et l’exploitation des images et en noir l’attente d’une crue possible 

mais les images ne sont pas traitées. 

þ›ÿ

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Nombre d’images 

150 

100 

50 

0 

0 20 40 60 80 100 120 140 160 180 200 220 240 

Luminance V 

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Histogramme des valeurs moyennes de la Þ 

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809;:0< "!>= 

Déplacements individuels des points de référence marqués du vecteur rouge. La position originelle sur 

l’image de référence est tracée du cercle vert et la nouvelle position du cercle rouge. 

A@©BDCFE*CHG6I4JK6L4MNGAOQPL4RTS¤U#PHB;M>UWVWRAPL4RXYRT@U#PQOLZKA[*I4R6\ 

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~0;€00‚ ƒ4„†… 

Déplacement global de l’image marquée du vecteur rouge identique à tous les points de référence. 

Les cercles bleus représentent les positions définitives, les cercles rouges les positions individuelles précédemment 

calculées. Sont repérés par les cercles blancs ceux pour lesquels le déplacement individuel avait fourni de mauvaises 

positions. 

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Etape 0 

Etape 1 Etape 2 Etape 3 

 

Une photographie de l’Isère à Saint Martin d’Hères. 

Etape 1 : Détection de la position de la mire au sein de l’image automatiquement recentrée. 

Etape 2 : Plusieurs intersections possibles sont définies. 

Etape 3 : Choix de l’intersection la plus vraisemblable. 

"!

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400 

350 

300 

B 

G 

R 

Norme 

H 

S 

V 

Intersection 

Reflet 

Valeur de la variable 

250 

200 

150 

100 

50 

0 

0 100 200 300 400 500 600 700 

Position depuis le sommet de la mire 

¤¦¥¨§¦© 

Un cas de recherche d’intersection où le reflet perturbe grandement la couleur de base .

! "#%$'&)(* +-,.0/1 +!243%#53672438 +-39(;:=@ACB4# 

400 

350 

300 

B 

G 

R 

Norme 

H 

S 

V 

Intersection 

Valeur de la variable 

250 

200 

150 

100 

50 

0 

0 100 200 300 400 500 600 700 


DFË G¦H+IJK9L 

Un cas de recherche d’intersection où la mire est partiellement à l’ombre. 

MONP

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S1 S2 S3 S4 S5 

Psi(1) 

Psi(2) 

Psi(1) 

Psi(i) 

Niveau d’eau 

Psi(i) 

Mire 

Mode de définition de la æ;ç)èÝé série sur la largeur de la mire. La manière de sommer les saturations 

á¦âØã¦ä'¯–Œ°O±å 

dépend de l’orientation du plan d’eau sur l’image. S’il est horizontal, æ alors représente la somme é des sur une 

même ligne (cas de gauche). S’il a une orientation quelconque, alors æ la prend en compte (cas de droite). 

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Evolution le long de la mire de la différence des moyennes ð de , au sein d’une fenêtre glissante de 

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cas 1 cas 2 cas 3 

cas 4 cas 5 cas 6 

Cas 1 : Mire bien eclairée. 

hŽ/h’‘[“”)•'– 

Différents exemples où toutes les intersections possibles apparaissent en bleu. 

Cas 2 : Mire à l’ombre. 

Cas 3 : Mire à moitié à l’ombre. 

Cas 4 : Mire en contre-jour. 

Cas 5 : Mire ayant un dépôt sédimentaire sur le bas. 

Cas 6 : Mire à la tombée du jour. 

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2 

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Moulinet 

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1.4 

Vitesse de surface (m/s) 

1.2 

1 

0.8 

0.6 

0.4 

0.2 

*,+.-,/02130#4 

0 

0 10 20 30 40 50 60 70 80 

Abscisse (m) 

Profil transversal obtenu par PIV sur l’Isère. Les vitesses sont largement sous-estimées par rapport à la 

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Cas 3 

Cas 2a 

Cas 2b 

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Cas 1 : Des feuilles tracent bien la vitesse de l’eau. 

Cas 2a : Un récipient en plastique est l’idéal. 

Cas 2b : Un tronc d’arbre est bien visible mais sous-estime la vitesse. 

Cas 3 : Seuls des vaguelettess et remous sont observables. 

Une forte zone de reflet du soleil est indiqué. 

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§ü©’ªt«¬’®°¯¦±B²¬Z«(³1«µ´¨©’¬Z« ·°ªu f¬=©u¸³9®‰¹_ºä»t¼L©W½ ® 

1200 

1000 

ADCP 

Mesures 

Station 

800 

Debit (m3/s) 

600 

400 

200 

¾¿ ÀÁÂ¢ÃrÄxÂiÅ 

0 

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 

Hauteur (m) 

Comparaison entre la courbe de tarage de la station hydrologique de Saint Martin d’Hères, en pointillés, 

et celle obtenue à partir du système HyMAGE en trait plein, basé sur les débits calculés marqués par les croix. 

Æ Ç3ÈÇ É 

ÊŸËµÌ¦ÍWÎ1Ï=Ì*Ë(ÐÑÓÒÎ9Ì/Ï=Ô9Ì*ÕÖb×xØZ×¨Ì 

ä9â¦å#é#ìAåXèÜ+ß Âxû è¢ìSüæ.å;Ü.Ý6é;Ü+ßHÛLÜ+ß#Þå;Ü+ßMèÜå;æNëýæ.å;Ü.Ý1ç+ÜUä9â¦åWÛLÚ*ÞàAìAÝ1Ü.éað_Ý1Ú*é#å;Ü!è¢ì3ß#äÚxß#ìAé#ì3Ú*Ý Ã 

)*,+

N5OP#QSRUTWVYX[Z/\^]#RUTWVS_#\^`1TaZ/PbdcYe¥TaZ/Pfgih5jk5l©Z/\UVc#Tmǹ\UTm_no\^_XqpmQr\UTmP#Qs¡hWtuvN5OP#Qwc#TWVSxyZ/P#ozTmP#QzVVrP#N5pmQr\UTmP#QzTWV 

JY Tmo€pWaZ/Qro€Z/P#‚§lƒTm_nozT„sƒ_…OP#`1TaZ/P†N‡OP#QˆRUTWV!_#\^`1TaZ/PbTborQBZ/N5ORUpWV!ozOP#o€Tm_

±5²›³µŚB·5¸µ¹ º/»¼·‡[½…ª¾1³µ·‡B¿À ´›¿¸'· ³›Á½y¹ ÂŽÃ²”ÄSÅƒ³£Æ¹ 

1200 

50 

1000 

quantile 80% 

mediane 

Station 

40 

30 


mediane 

800 

20 

Debit (m3/s) 

600 

% de difference 

10 

0 

-10 

400 

-20 

200 

-30 

-40 

0 

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 

Hauteur (m) 

-50 

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 

Hauteur (m) 

En grisée le quantile tel que ÐÑyÒ des 

ÇEÈGÉEÊdËÌÍ§Î«Ï 

courbes se situes dans cet intervalle. En noire la médiane 

de celles-ci et en pointillé la référence de la station 

de Saint Martin d’Hères. 

Erreurs relatives des courbes reconstituées 

ÇEÈGÉEÊ§ËÌÍ§Ó£Ï 

par HyMAGE par rapport à la courbe de référence de la 

station de Saint Martin d’Hères. 

1200 

50 

1000 


mediane 

Station 

40 

30 

800 

20 

Debit (m3/s) 

600 

% de difference 

10 

0 

-10 

400 

-20 

200 

-30 

-40 

0 

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 

Hauteur (m) 

-50 

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 

Hauteur (m) 

Calcul anticipé du débit ayant mesuré la 

ÇEÈGÉEÊyËÌÔ§ÕdÏ 

hauteur d’eau. 

Erreur relative sur le calcul anticipé du 

ÇEÈGÉEÊ'ËÌÔÖ©Ï 

débit par rapport à la courbe de la station. 

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