AquaLinked hydrological analysis

River Discharge Time-Series Aggregation & Disaggregation

Upload river-flow observations, identify the timestamp and discharge columns, select a required time interval and produce a scientifically documented hydrograph with missing-data and water-volume checks.

Upload discharge data

Upload tabular river-discharge files or NASA/Earth-observation scientific files. The temporary upload limit is 1000 MB. Uploaded files, generated results, graph data and progress files expire automatically after six hours.

Download sample CSV

Supported river-discharge data formats

CSV, TXT and TSV

Streamed row by row. Recommended headings: serial_no, timestamp and discharge_m3s.

NASA-style NetCDF

Use .nc or .nc4 files containing dimensions, coordinates, variables, units and time metadata.

NASA CDF

Use .cdf for NASA Common Data Format files. CDF is inspected separately from NetCDF.

View example NASA-style NetCDF structure

The file is binary; this is a readable example of its scientific header.

File: SWOT_river_discharge_2026.nc4

dimensions:
    time = 48
    reach = 1250

variables:
    double time(time)
        units = "hours since 2026-07-01 00:00:00 UTC"
    int64 reach_id(reach)
        long_name = "SWOT river reach identifier"
    float latitude(reach)
        units = "degrees_north"
    float longitude(reach)
        units = "degrees_east"
    float discharge(time, reach)
        long_name = "River discharge"
        units = "m3 s-1"
        _FillValue = -9999

River discharge data file Maximum temporary upload: 1000 MB. Accepted: CSV, TXT, TSV, NASA/Earth-observation NetCDF (.nc, .nc4) and NASA CDF (.cdf).

Column separator

First row contains column headings

Temporary-file policy

The uploaded file and all generated results are automatically deleted six hours after upload. Download required results before the displayed expiry time.

Scientific calculation rules

Discharge aggregation

Discharge is a rate and is not summed. Use a mean, an extreme, a median or integrate it over time to obtain water volume.

Discharge disaggregation

The constant-step method preserves source-interval volume. Linear interpolation assumes a straight hydrograph between observations.

Acceptance checks

The report verifies timestamps, duplicates, missing periods, invalid values, interval regularity and water-volume consistency.