"河川工学" meaning in Japanese

{
  "etymology_text": "From 河川 (kasen, \"rivers\") + 工学 (kōgaku, \"engineering\").",
  "forms": [
    {
      "form": "河川工学",
      "ruby": [
        [
          "河",
          "か"
        ],
        [
          "川",
          "せん"
        ],
        [
          "工",
          "こう"
        ],
        [
          "学",
          "がく"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kasenkōgaku",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "かせんこうがく"
      },
      "expansion": "河(か)川(せん)工(こう)学(がく) • (kasenkōgaku)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "river engineering; hydromodification"
      ],
      "id": "en-河川工学-ja-noun-3EIrXuY6",
      "links": [
        [
          "river",
          "river"
        ],
        [
          "engineering",
          "engineering"
        ],
        [
          "hydromodification",
          "hydromodification"
        ]
      ]
    }
  ],
  "word": "河川工学"
}

{
  "etymology_text": "From 河川 (kasen, \"rivers\") + 工学 (kōgaku, \"engineering\").",
  "forms": [
    {
      "form": "河川工学",
      "ruby": [
        [
          "河",
          "か"
        ],
        [
          "川",
          "せん"
        ],
        [
          "工",
          "こう"
        ],
        [
          "学",
          "がく"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kasenkōgaku",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "かせんこうがく"
      },
      "expansion": "河(か)川(せん)工(こう)学(がく) • (kasenkōgaku)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms spelled with fifth grade kanji",
        "Japanese terms spelled with first grade kanji",
        "Japanese terms spelled with second grade kanji",
        "Japanese terms with redundant sortkeys",
        "Japanese terms written with four Han script characters"
      ],
      "glosses": [
        "river engineering; hydromodification"
      ],
      "links": [
        [
          "river",
          "river"
        ],
        [
          "engineering",
          "engineering"
        ],
        [
          "hydromodification",
          "hydromodification"
        ]
      ]
    }
  ],
  "word": "河川工学"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </span>",
  "path": [
    "河川工学"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "河川工学",
  "trace": ""
}