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Irrigation

L7019K – Geohydrologi

Oral presentation

Cesar Fernando Garnier

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Irrigation channels are designed to s!pply water in land%

drainage channels are designed to re&o'e a specifc a&o!nto water in land

Diference between drainage andirrigation:

Irrigation is oten st!died together with drainage%which is the nat!ral or artifcial re&o'al o s!race

and s!)*s!race water ro& a gi'en area

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Irrigation systems are often designed tomaximize efciencies and minimize labour

and capital requirements

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+ild ,ooding◦ -rip irrigation .locali/ed irrigation

◦ plin2er irrigation Center 3i'ot

F!rrow irrigation◦ !)*irrigation

4oarder * strip irrigation 4asin irrigation

Types o irrigation systems:

!race irrigation&ethods

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-rip Irrigation .locali/ed irrigation

+ild Flooding

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plin2er yste& .center pi'ot

+ild Flooding

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F!rrow Irrigation

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4order – trip Irrigation

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4asin Irrigation

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The irrigation system or a eld or a arm must becompatible with the other existing arm operations, suchas land preparation, cultivation, and harvest.◦ Le'el o 5echani/ation

◦ i/e o Fields

◦ C!lti'ation

◦

3est Control◦  6opographic Li&itations

estrictions on irrigation system selection due totopography include:◦ Gro!ndwater le'els

◦  6he location and relati'e ele'ation o the water so!rce%

◦

Field )o!ndaries%◦ $creage in each feld%

◦  6he location o roads

◦ 3ower and water lines and other o)str!ctions%

◦  6he shape and slope o the feld

!ompatibility o the irrigation systems:

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o!rces o irrigation water can )e gro!ndwateretracted ro& springs or )y !sing wells% s!racewater withdrawn ro& ri'ers% la2es or reser'oirs ornon*con'entional so!rces li2e treatedwastewater% desalinated water or drainage water

o!rces o irrigation water

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8ydrological cycle

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"round water resources

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ha!sti)le and !ne'enly a'aila)le Gro!nd water : s!race water .)iological

characteristics Gro!nd water ; s!race water.che&ical characteristics

'aporation ro& !ndergro!nd reser'oirs is&!ch less

Gro!nd water so!rce has indefnite lie .iproperly &anaged

Gro!nd water is generally o !nior&te&perat!re and &ineral "!ality and is ree os!spended i&p!rities

"round water resources

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Irrigation #alinity

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 68$<K =O>

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$sawa% GL% ?00@. Irrigation and $ater esources%ngineering. &'(

C 4ro!wer Irrigation $ater )anagement: Irrigation)ethods. F$O Land and +ater -e'elop&ent -i'ision

http#AAwwwaoorgAdocrepA

)ethods * Techni+ues o Irrigationhttp#AAwwwa)o!tci'ilorgA&ethods*o*irrigationht&l Cynthia 3od&ore% ?009 Irrigation salinity causes and

impacts 3ri&eact 9B7

http#AAwwwdpinswgo'a!ADD 

dataAassetsApdDfleA001EAB10B@AIrrigation*salinity*ca!ses*and*i&pactspd 

ie)ert% 4!r2e% 5 Fa!res% K Fren2en% 8ooge'een% 3 -Hll%and F6 3ort&ann% ?010 "roundwater use or irrigation aglobal inventory 8ydrology and earth syste& sciences 1E

eerences: