🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsTürkçeРусскийالعربيةفارسی日本語EntityQ1422857· pop 16· linked from 173 articlesStrahler numbermeasure of the branching complexity of a mathematical tree or a river systemConnectionsbinary treeEntitymathematicsEntityCategoriesGeomorphologyGraph invariantsHydrologyPhysical geographyTrees (graph theory)