Timonha River

{{Infobox river

| name = Timonha River

| native_name ={{native name|pt|Rio Timonha}}

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| pushpin_map = Brazil

| pushpin_map_caption= Mouth location in Brazil

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| source1_location = Ibiapina Mountain, Viçosa do Ceará, Ceará state

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| mouth_location = Atlantic Ocean

| mouth_coordinates = {{coord|-2.933462|-41.266776|region:BR|format=dms|display=inline,title}}

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| subdivision_type1 = Country

| subdivision_name1 = Brazil

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| length = {{convert|90|km|mi|abbr=on}}

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The Timonha River is a river of Ceará state in eastern Brazil. Like many small rivers of northeastern Brazil, the Timonha River dries up between July and November and only flows during the rainy season.{{Cite journal|last1=Onofre de Morais |first1=Jáder |last2=Braga Dias |first2=Carolina |last3=de Souza Pinheiro |first3=Lidriana |title=Depuration Capacity of the Timonha-Ubatuba Estuarine System, in Ceará State, Brazil |url=https://repositorio.ufc.br/bitstream/riufc/28767/1/2014_art_jodemorais.pdf |journal=Arquivos de Ciências do Mar |volume=47 |issue=1 |pages=30–37 |access-date=2022-06-21}} According to a survey by the United States Hydrographic Office, the Timonha River is too small to allow passage by boats.{{Cite book|title=Change No. 7 to H.O. Pub. No. 23, Sailing Directions for South America, Vol. 1 |url=https://books.google.com/books?id=rnaZaDbPUrkC&pg=PT24 |edition=5th |page=110 |publisher=United States Hydrographic Office |date=1962-07-07}}

The river is part of the Timonha-Ubatuba estuarine system, which has the largest mangrove ecosystem in Ceará.

The river delta is protected by the {{convert|313800|ha}} Delta do Parnaíba Environmental Protection Area, created in 1996.{{citation|language=pt|ref={{harvid|APA Delta do Parnaíba (Federal) – ISA}}

|title=APA Delta do Parnaíba (Federal)|publisher=ISA: Instituto Socioambiental

|url=https://uc.socioambiental.org/uc/585933|accessdate=2017-02-09}}