river @ Costa Rica

Oblique10/10/2026 16:11 · RIVeR 3.8.0

26.03m³/s

Measured: 100.00 %
Sections: 1
Technique: LSPIV
Stations: 14

Frame step 1
Resize factor 1

CS_default_1

LSPIV26.03 ± 1.81 m³/s100.00 % Measured · 0.00 % Interpolated · 14 stations · α 0.85

LSPIV 26.03 m³/s · reported
STIV 32.17 m³/s
iWave 30.51 m³/s

#	xm	dm	Am²	Vsm/s	Qm³/s
1	0.00	0.00	0.00	-	-
2	2.08	0.19	0.39	0.46	0.15
3	4.15	0.37	0.78	0.64	0.42
4	6.23	0.53	1.11	0.93	0.87
5	8.31	0.65	1.35	1.20	1.38

#	xm	dm	Am²	Vsm/s	Qm³/s
6	10.38	0.75	1.55	1.34	1.77
7	12.46	0.90	1.86	1.51	2.40
8	14.54	1.02	2.12	1.62	2.92
9	16.62	1.08	2.25	1.70	3.25
10	18.69	1.15	2.38	1.68	3.41

#	xm	dm	Am²	Vsm/s	Qm³/s
11	20.77	1.23	2.56	1.63	3.55
12	22.85	1.30	2.70	1.63	3.74
13	24.92	0.91	1.88	1.36	2.17
14	27.00	0.00	0.00	-	-

How this was measured

Calibration · Oblique

Point	x px	y px	X m	Y m
1	17.10	362.01	0.00	-0.00
2	1133.58	974.87	28.53	-0.00
3	1449.40	452.40	24.84	12.62
4	870.67	119.50	-19.45	36.68

Pair	Entered m	Solved m
1-2	28.53	28.53
2-3	13.15	13.15
3-4	50.40	50.40
4-1	41.52	41.52
1-3	27.86	27.86
2-4	60.40	60.40

Footage

Name: oblique.mp4
Resolution: 1920 × 1080 · 30 fps · 00:34:00
Processed Range: 00:00:00 → 00:34:00
Frame step: 1 · 33.33 ms
Resize factor: 1

Across the processed range

00:00:00

00:00:00

Processing

LSPIV
Grayscale: Yes
CLAHE: Clip Limit 5
Windows Sizes: 128 | 64 px
Std filtering: Threshold 4
Median test filtering: ε 0.02 · Threshold 2

STIVcomputed for comparison, not reported
CNN model, weights: doi:10.5281/zenodo.22050810
ROI Height: 4 m

iWavecomputed for comparison, not reported
Values: Automatic, estimated from LSPIV + STIV
Window size: 2.47 m | 56 px
Max velocity: 3.59 m/s
Flow type: Waves
Time window: 10 s