{
  "schema_version": 1,
  "data_status": "observed",
  "model_status": "trained_observed_daily",
  "snapshot_date": "2026-10-10",
  "common_period": {
    "start": "2015-01-01",
    "end": "2021-12-31"
  },
  "sources": [
    {
      "river_id": "yellow_river",
      "river_name": "黄河",
      "station": "利津站",
      "author": "Tao Li",
      "title": "Daily mean discharge and suspended sediment concentration from 2015 to 2021 at Lijin station",
      "url": "https://data.mendeley.com/datasets/vskktt3v3k/1",
      "doi": "10.17632/vskktt3v3k.1",
      "original_source": "Chinese Hydrological Yearbook, as attributed by the archive author",
      "download_url": "https://data.mendeley.com/public-files/datasets/vskktt3v3k/files/9e7463ae-9b41-4778-9832-d7011b6351b0/file_downloaded",
      "license": "CC BY 4.0",
      "license_url": "https://creativecommons.org/licenses/by/4.0/",
      "redistribution_allowed": true,
      "frequency": "daily",
      "discharge_units": "m³/s",
      "raw_file": "experiments/observed_rivers/raw/lijin_daily_2015_2021.xlsx",
      "raw_sha256": "3289060e9c53d7afa7ab9c68993aad1b713985a4a39cfbb745bcba940de12924",
      "raw_observations": 2558,
      "raw_period": {
        "start": "2015-01-01",
        "end": "2022-01-01"
      },
      "observations_in_common_period": 2557,
      "modifications": "None; original XLSX retained byte-for-byte. The common-period count excludes the extra 2022-01-01 record without altering the file.",
      "daily_definition": "Source calendar date labels retained. The workbook does not specify its civil-day timezone convention.",
      "quality_note": "No per-record instrument-quality flags are supplied in the workbook. Public archiving is not independent validation of the original measurements."
    },
    {
      "river_id": "mississippi",
      "river_name": "密西西比河",
      "station": "Mississippi River at St. Louis, MO",
      "station_id": "USGS-07010000",
      "author": "U.S. Geological Survey",
      "url": "https://waterdata.usgs.gov/monitoring-location/USGS-07010000",
      "api_url": "https://api.waterdata.usgs.gov/ogcapi/v1/?f=html",
      "download_url": "https://api.waterdata.usgs.gov/ogcapi/v1/collections/daily/items?monitoring_location_id=USGS-07010000&parameter_code=00060&statistic_id=00003&datetime=2015-01-01/2021-12-31&limit=10000&f=json",
      "license": "US Government work in the public domain",
      "license_url": "https://api.waterdata.usgs.gov/ogcapi/v1/?f=html",
      "redistribution_allowed": true,
      "frequency": "daily",
      "parameter_code": "00060",
      "statistic_id": "00003",
      "discharge_units": "ft³/s",
      "conversion_to_m3_s": 0.028316846592,
      "raw_file": "experiments/observed_rivers/raw/usgs_st_louis_daily.json",
      "raw_sha256": "017d5b1b709acf68199f555b00b6ee815e8df2c39b18d121895d9fc1b50da55e",
      "raw_observations": 2557,
      "raw_period": {
        "start": "2015-01-01",
        "end": "2021-12-31"
      },
      "observations_in_common_period": 2557,
      "approval_status_counts": {
        "Approved": 2557
      },
      "quality_flag_counts": {
        "ESTIMATED": 39,
        "EQUIP": 15,
        "FORCEINTERPOLATION": 2
      },
      "records_with_quality_flags": 41,
      "modifications": "None; the downloaded API response and native ft³/s values are retained. The conversion factor is documented, not applied to the downloadable original file.",
      "daily_definition": "USGS daily mean (statistic 00003); original calendar date labels retained, not interpreted as simultaneous UTC instantaneous observations.",
      "quality_note": "39 days estimated, including 15 also equipment-flagged; 2 provider-interpolated days. No project interpolation, imputation or generated observations."
    }
  ],
  "publication_note": "Real daily discharge models for Lijin and St. Louis only. Legacy synthetic experiments are not used by this site. Forecasts extend a historical cutoff and are not live operational forecasts."
}