檢視灌溉的原始碼

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|<center>'''灌溉'''<br><img src="https://agriharvest.tw/wp-content/uploads/2020/07/1-4-p09-DSCF7763-696x464.jpg" width="280"></center><small>[https://agriharvest.tw/archives/41383 圖片來自agriharvest]</small> 
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'''灌溉'''就是人為方式使用天然降水（雨水）以外的其他[[水]]源供給[[土地]]或[[土壤]]水份，多半是用来种植[[农作物]]或其他[[植物]]，也可以用來維持[[地貌景觀]]，或在乾燥地帶或是在過度降雨後的地區進行植被重建，灌溉對農作物也有其他的好處，包括保護植物免於霜害<ref>{{cite web | last1 = Snyder | first1 = R. L. | last2 = Melo-Abreu | first2 = J. P. | title = Frost protection: fundamentals, practice, and economics | volume = Volume 1 | publisher = Food and Agriculture Organization of the United Nations | year = 2005 | url = ftp://ftp.fao.org/docrep/fao/008/y7223e/y7223e00.pdf | format=PDF | issn=1684-8241}}</ref>、在糧食區抑制雜草成長<ref>{{cite web | last = Williams | first = J. F. | author2 = S. R. Roberts | author3 = J. E. Hill | author4 = S. C. Scardaci | author5 = G. Tibbits | title = Managing Water for Weed Control in Rice | publisher = [[UC Davis, Department of Plant Sciences]] | url = http://www.plantsciences.ucdavis.edu/uccerice/WATER/water.htm | accessdate = 2007-03-14 | deadurl = yes | archiveurl = https://web.archive.org/web/20070403211941/http://www.plantsciences.ucdavis.edu/uccerice/WATER/water.htm | archivedate = 2007-04-03 }}</ref>，並且抑制土壤[[固結]]<ref>{{cite web |url=http://ngm.nationalgeographic.com/2008/09/soil/mann-text.html |title=Aridpoop -05-15 |accessdate=2012-06-19 |archive-date=2017-04-25 |archive-url=https://web.archive.org/web/20170425181742/http://ngm.nationalgeographic.com/2008/09/soil/mann-text.html |dead-url=no }}</ref>。不用灌溉而以雨水为唯一水源的[[农业]]称为旱田。

灌溉系統也會用來抑制[[灰塵]]、排放[[污水]]以及礦物的堆摊浸滤。灌溉系統常會和[[排水]]系統一起研究，後者是用天然或人工的方式除去某一區域地表或是地表以下的水份。

灌溉是五千多年來農業的中心特徵，也是許多文化的成果，是許多國家經濟及社會的基礎。