{
  "domain": "earth-environment",
  "topics": [
    "hydrology"
  ],
  "kind": "question",
  "source": {
    "key": "hydrology-23",
    "name": "Twenty-three unsolved problems in hydrology",
    "url": "https://doi.org/10.1080/02626667.2019.1620507",
    "id": "8",
    "curator": "Blöschl et al.",
    "poser": "Blöschl et al.",
    "status": "open question (2019 agenda)",
    "as_of": "2026-10-20",
    "catalog": "0521c19bbd38"
  },
  "review": true,
  "approval": "first-time"
}