Lee ebe Ọnụ ọgụgụ Bowen si

A na-eji '''ọnụ ọgụgụ Bowen''' akọwa ụdị nnyefe okpomọkụ màkà elu nke nwéré mmiri.  Mbufe okpomọkụ nwèrè ike ime dị ka okpomọkụ dị mmá (ọdịiche dị na okpomọkụ na-enweghị evapotranspiration) ma ọ bụ okpomọkụ zoro ezo (ike achọrọ n'oge mgbanwe nkè ọnọdụ, na-enweghị mgbanwe na okpomokwu).  A na-ejikarị ọnụ ọgụgụ Bowen eme ihe iji gbakọọ okpomọkụ furu efu (ma ọ bụ nweta) n'ime ihe; ọ bụ ọnụ ọgụgụ nke ike na-aga site n'otu steeti gaa na nke ọzọ site na okpomọkụ dị mma na okpompe zoro ezo.

Ọ bụ Harald Sverdrup nyèrè ọnụ ọgụgụ ahụ aha Ira Sprague Bowen (1898ī1973), onye na-ahụ maka ihe ndị dị na mbara igwe nkè ọrụ ya na ikuku si na mmiri jiri ya mee ihe na mbụ, a na-ejikarị ya eme ihe na meteorology na hydrology. 

== Nkọwa ==
A na-agbakọ ọnụ ọgụgụ Bowen site na usoro: 

: , ebe okpomọkụ dị mma na okpomọkụ zoro ezo.<math>B = {\frac{Q_h}{Q_e}}</math><math>Q_h</math><math>Q_e</math>

N'ọnọdụ a, mgbè oke nke erughị otu, a na-enyefe oke nke ike dị n'elu ikuku dị ka okpomọkụ dị omimi karịa ka okpompe dị omimi, na mkparịta ụka bụ eziokwu maka uru nke karịrị otu.<math>B</math><math>B</math>  Dị ka , Otú ọ dị, ọ na-aghọ ihe na-enweghị njedebe na-eme ka ọnụ ọgụgụ Bowen bụrụ nhọrọ na-adịghị mma nke mgbanwe maka iji ya na usoro, ọkachasị màkà ébé kpọrọ nkụ.<math>{Q_e \rightarrow 0}</math><math>B</math>  N'ihi nke a, akụkụ evaporative bụ mgbè ụfọdụ nhọrọ kwesịrị ekwesị nke mgbanwe na-anọchite anya ònyìnyé dị íchè íchè nke mgbagwoju anya na-agafe na mmefu ego ike elu.

Bowen ratio nwèrè njikọ na evaporative fraction, , site na nhazi,<math>EF</math>

: .<math>{EF = \frac{Q_e}{Q_e + Q_h} = \frac{1}{1+B}}</math>

Ọnụ ọgụgụ Bowen bụ ihe na-egosi ụdị elu. Ọnụ ọgụgụ Bowen, , bụ ihe na-erughị otu n'elu ébé nwéré ọtụtụ mmiri.<math>{B}</math>
{| class="wikitable"
!Ụdị elu ya
!Ogologo nke Bowen ratios
|-
|Ọzara
|>10.0
|-
|Ala ndị kpọrọ nkụ
|2.0-6.0
|-
|Oké ọhịa na ala ahịhịa
|0.4-0.8
|-
|Oké ọhịa mmiri ozuzo
|0.1-0.3
|-
|Oké Osimiri ndị na-ekpo ọkụ
|<0.1
|}

== Edensibia ==

* {{Cite journal|author=Bowen|first=I.S.|year=1926|title=The ratio of heat losses by conduction and by evaporation from any water surface|journal=[[Physical Review]]|volume=27|issue=6|pages=779–787|doi=10.1103/PhysRev.27.779|url=https://authors.library.caltech.edu/2467/1/BOWpr26b.pdf}}
* {{Cite journal|doi=10.1175/1520-0477(1995)076<2433:TSBTBR>2.0.CO;2|year=1995|volume=76|issue=12|pages=2433–2443|title=The Story behind the Bowen Ratio|journal=[[Bulletin of the American Meteorological Society]]|author=Lewis|first=J. M.|url=http://ams.allenpress.com/amsonline/?request=get-abstract&issn=1520-0477&volume=076&issue=12&page=2433}}
* {{Cite book|author=Sturman|first=Andrew P.|year=1996|title=The Weather and Climate of Australia and New Zealand|pages=309–310|isbn=978-0195539233|publisher=Oxford University Press}}

== Njikọ mpụga ==

* [https://web.archive.org/web/20030327074553/http://www.nsdl.arm.gov/Library/glossary.shtml#bowen_ratio National Science Digital Library - Bowen Ratio]