Rainfall collection calculator

Open Rainfall collection calculator on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Tool capabilities

{
  "id": "rainfall-collection-calculator",
  "category": "calculators",
  "built": true,
  "requirements": "One event with no water use during rainfall. Efficiency and first flush are supplied assumptions. No forecast, plumbing design or drinking-water suitability is implied.",
  "implementation": {
    "fields": [
      {
        "key": "area",
        "label": "Horizontal projected catchment area",
        "value": 100,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "areaUnit",
        "label": "Area unit",
        "value": "m²",
        "type": "select",
        "values": [
          "m²",
          "ft²",
          "yd²",
          "acre",
          "hectare"
        ]
      },
      {
        "key": "rainfall",
        "label": "Rain depth in this event",
        "value": 20,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "depthUnit",
        "label": "Water depth unit",
        "value": "mm",
        "type": "select",
        "values": [
          "mm",
          "cm",
          "m",
          "in",
          "ft"
        ]
      },
      {
        "key": "efficiency",
        "label": "Collection efficiency before first flush (%)",
        "value": 80,
        "type": "number",
        "min": 0,
        "max": 100,
        "step": "any"
      },
      {
        "key": "firstFlush",
        "label": "First-flush volume discarded",
        "value": 50,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "tankCapacity",
        "label": "Tank capacity",
        "value": 1500,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "tankExisting",
        "label": "Water already in tank",
        "value": 200,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "volumeUnit",
        "label": "Volume unit",
        "value": "L",
        "type": "select",
        "values": [
          "L",
          "m³",
          "US gal",
          "Imp gal",
          "ft³",
          "yd³"
        ]
      }
    ],
    "input": false,
    "background": false,
    "live": true,
    "presentation": "metrics",
    "note": "Calculate one event’s potential runoff, first-flush loss, new storage and overflow. Assumes no water use during the event and makes no potability claim. Runs on your device. Changing units keeps the entered numbers.",
    "experience": {
      "automatic": true,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "Your text",
      "placeholder": "Type or paste your input…",
      "help": "Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.",
      "helpParts": [
        "Change the input or settings to update your result.",
        "Results update as you type.",
        "Up to 1,000,000 characters."
      ],
      "action": null
    },
    "mode": "automatic",
    "interactive": false
  },
  "execution": "Browser interface",
  "api": null,
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}

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