laporantugasakhir pengukuran debit dan pengaturan

LaporanTugasAkhir

PENGUKURAN DEBIT DAN PENGATURAN AIR IRIGASI

DI DAERAH IRIGASI BATANG LAMPASI

KOTA PAYAKUMBUH

Oleh

PADLIN AZIMI

NBP.1001342024

PROGRAM STUDI TATA AIR PERTANIAN

JURUSAN TEKNOLOGI PERTANIAN

POLITEKNIK PERTANIAN UNIVERSITAS ANDALAS

PAYAKUMBUH

2013

PENGUKURAN DEBIT DAN PENGATURAN AIR IRIGASI

DIDAERAH IRIGASI BATANG LAMPASI

KOTA PAYAKUMBUH

Oleh :PadlinAzimi

RINGKASAN

Tujuandari PKPM iniadalah

a).Memperluaswawasandanmeningkatkanpengetahuantentangpengoperasianda

npemeliharaanjaringanirigasi.b).Dapatmelaksanakanpengukuran debit

denganmetodeluaskecepatanc). Mengetahuitatacarapengaturan air irigasi di

Daerah IrigasiBatangLampasi.Manfaatdari PKPM antara lain

a).Denganadanyapengalaman PKPM ini,

dapatmenambahilmupengetahuantentangoperasidanpemeliharaansistemirigasi

b).Mahasiswamendapatilmudanpengalamankerjasesuaidalambidangoperasidan

pemeliharaan (O-P) Serta pengukuran debit (Q)

denganmenggunakanmetodeluasdankecepatan c).Denganpengalaman yang

diperoleh,

mahasiswadiharapkandapatmeningkatkanketerampilandanmempersiapkandiri

menghadapiduniakerja.hasilpengukuran debit

padasaluranIrigasiBatangLampasi BKS 1- BKS 2 adalahsebagaiberikut:

pengukuran debit padasaluranirigasi BKS 1 didapatkan debit air yaitu 656

m3/dt.sedangkanpadapengukuran debit padasaluranirigasi BKS 2 didapatkan

debit yaitu 243 m3/dt.debit air yang

diperolehpadasaatpengukuranlebihkecildari debit

maksimumirigasi.operasipengaturan air irigasibatanglampasi yang

belumterlaksanadengan yang semestinyajugabanyaknyabangunanirigasi yang

tidakberfungsikarenasudahdalamkeadaanrusakdanharusnyasegeradiperbaiki.

LaporanTugasAkhir

PENGUKURAN DEBIT DAN PENGATURAN AIR IRIGASI

DIDAERAH IRIGASI BATANG LAMPASI

KOTA PAYAKUMBUH

Oleh:

PADLIN AZIMI

NBP.1001342024

Laporaninimerupakansebagianpersyaratanuntukmenyelesaikanp

endidikan Diploma III

Pada

PROGRAM STUDI TATA AIR PERTANIAN

JURUSAN TEKNOLOGI PERTANIAN

POLITEKNIK PERTANIAN UNIVERSITAS ANDALAS

PAYAKUMBUH

2013

LaporanTugasAkhir

PENGUKURAN DEBIT DAN PENGATURAN AIR IRIGASI

DIDAERAH IRIGASI BATANG LAMPASI

KOTA PAYAKUMBUH

Oleh :

PADLIN AZIMI

NBP. 1001342024

Menyetujui :

KetuaJurusanDosenPembimbing

TeknologiPertanian

Ir.Harmailis,M.SiIr.Ismawardi,MP

NIP . 19690716 199403 1 003 NIP . 196003111989031004

Mengetahui ,

DirekturPoliteknikPertanian

UniversitasAndalas

Ir.DeniSorel,M.Si

NIP.19600416198803100

LaporanTugasAkhir

PENGUKURAN DEBIT DAN PENGATURAN AIR IRIGASI

DIDAERAH IRIGASI BATANG LAMPASI

KOTA PAYAKUMBUH

Oleh :

PADLIN AZIMI

NBP.1001342024

TelahDiuji DanDipertahankan Di Depan Tim PengujiLaporanTugasAkhir

Program Studi Ata Air PertanianPoliteknikPertanianUniversitasAndalas

Padatanggal 12 Juli 2013

TIM PENGUJI

No Nama Jabatan TandaTangan

1 Reni Ekawaty,Ssi.Msi Ketua

2 Ir. Ismawardi, MP Anggota

3 Ir. Amrizal, MP Anggota

KATA PENGANTAR

Pujisyukurpenulisucapkankehadirat Allah SWT yang

telahmemberikanrahmatdankarunia_Nyakepadapenulissehinggapenulisdapatmeny

elesaikanLaporanPengalamanKerjaPraktekMahasiswa (PKPM).

Laporaninimerupakansalahsatuhasildaripelaksanaan PKPM di

KantorDinasPengairan Kota Payakumbuh“Pengukuran Debit Dan Pengaturan

Air Irigasi Di DaerahIrigasiBatangLampasi Kota

Payakumbuh”.Penulistidaklupauntukmengucapkanterimakasihkepadasemuapiha

k yang telahmembantupenulisdalam proses penulisanlaporanini.

Ucapanterimakasihpenulissampaikan kepada:

1. Orang tuatercintaterutamaIbu yang

telahmemberidukunganbaikmorilmaupunmateril.

2. Bapak Ir. Ismawardi ,MP selakudosenpembimbing PKPM

3. BapakYeriSiswantoselakupembimbinglapang PKPM.

4. Dinas PSDA Provinsi Sumatera Barat danKaryawankantor Rehab

IrigasiBatangLampasiPT,NindyaKaryaPersero.

5. BapakWeriSusena ES, STP, MP selakuKetuaProgram Studi Tata Air

Pertanian.

6. Bapak Ir. HarmailisM.SiselakuKetuaJurusanTeknologiPertanian.

7. Bapak Ir. Deni Sorel,

M.SiselakuDirekturPoliteknikPertanianUniversitasAndalasPayakumbuh.

8. Semuateman – temansenasibseperjuangan yang telahmemberikansemangat.

9. Semuapihakyagtelahmembantu, baiksecaramorilmaupunmateril.

Penulismenyadaribahwalaporaninimasihjauhdarikesempurnaan,

untukitupenulismengharapkankritikdan saran yang sifatnyamembangun demi

perbaikanlaporanini, semogainidapatbermanfaatbagikitasemua.

TanjungPati, 3 Juli 2013

PA

DAFTAR ISI

Halaman

Halaman Judul ................................................................................. ....... i

Ringkasan ................................................................................................

ii

HalamanPersyaratan ................................................................................

iii

Halaman Pengesahan ..............................................................................

iv

HalamanPenguji ......................................................................................

................................................................................................................. v

KATA PENGANTAR ............................................................................

................................................................................................................. vi

DAFTAR ISI ...........................................................................................

................................................................................................................. vii

DAFTAR TABEL ...................................................................................

................................................................................................................. viii

DAFTAR GAMBAR ..............................................................................

ix

DAFTAR LAMPIRAN ...........................................................................

................................................................................................................. x

I. PENDAHULUAN ..............................................................................

............................................................................................................ 1

1.1.LatarBelakang .............................................................................

..................................................................................................... 1

1.2.Tujuan .........................................................................................

..................................................................................................... 2

1.3.Manfaat .......................................................................................

..................................................................................................... 3

II. TINJAUAN PUSTAKA ....................................................................

............................................................................................................ 4

2.1.Pengertian Debit .........................................................................

..................................................................................................... 4

2.2.Pengaturan Air Irigasi ................................................................

.................................................................................................... 5

2.3.JaringanIrigasi .............................................................................

..................................................................................................... 6

2.3.1.KlasifikasiJaringanIrigasi ...................................................

..................................................................................................... 7

2.3.2.BangunanIrigasi .................................................................

..................................................................................................... 9

2.4.TeknikPengukuran Debit ............................................................

..................................................................................................... 12

2.4.1.PengukuranSecaraLangsung ..............................................

..................................................................................................... 13

2.4.2.PengukuranSecaraTidakLangsung .....................................

..................................................................................................... 13

III. METODE PELAKSANAAN ..........................................................

.......................................................................................................... 18

3.1.WaktudanTempat ........................................................................

..................................................................................................... 18

3.2.Alat Dan Bahan ...........................................................................

..................................................................................................... 18

3.2.1.Alat .....................................................................................

..................................................................................................... 18

3.2.2.Bahan..................................................................................

..................................................................................................... 18

3.3.Pelaksanaan .................................................................................

..................................................................................................... 19

3.3.1. MenyiapkanPelampungUntukPengukuranKecepatan........

........................................................................................... 20

3.3.2. TempatPengukuran ............................................................

........................................................................................... 20

3.3.3. MenghitungPenampangSaluran .........................................

........................................................................................... 21

3.3.4. MenghitungKecepatanAliran .............................................

........................................................................................... 21

3.3.5. Perhitungan Debit ..............................................................

........................................................................................... 21

IV. HASIL DAN PEMBAHASAN ........................................................

.......................................................................................................... 22

4.1.Deskripsi Daerah IrigasiBatangLampasi.....................................

..................................................................................................... 22

4.1.1.SejarahIrigasiBatangLampasi ............................................

..................................................................................................... 22

4.1.2.KeadaanGeografis ..............................................................

..................................................................................................... 22

4.1.3.Luas Area ...........................................................................

..................................................................................................... 23

4.1.4.Sumber Air ........................................................................

..................................................................................................... 23

4.1.5.Topografi ............................................................................

..................................................................................................... 24

4.1.6.Iklim Dan Cuaca ................................................................

..................................................................................................... 24

4.1.7.Jenis Tanah Dan Tanaman .................................................

..................................................................................................... 25

4.2.PemeliharaanJaringanIrigasi .............................................................

25

4.3.Pengukuran Debit Saluran.................................................................

................................................................................................................. 26

4.3.1.ProfilSaluranIrigasi ...........................................................

................................................................................................................. 27

4.3.2. PerhitunganLuasPenampang ............................................

................................................................................................................. 27

4.3.3.Waktu Yang DibutuhkanPelampung.................................

................................................................................................................. 27

4.3.5.Perhitungan Debit..............................................................

................................................................................................................. 28

4.4 . Pengaturan Air Irigasi .............................................................

.................................................................................................... 31

4.4.1. PintuBagi Dan Sadap ......................................................

......................................................................................... 31

4.4.2. BangunanIrigasiBatangLampasi .....................................

......................................................................................... 32

4.4.3. Pengaturan Air Irigasi .....................................................

......................................................................................... 33

V .KESIMPULAN DAN SARAN .........................................................

................................................................................................................. 34

5.1. Kesimpulan ...............................................................................

................................................................................................................. 34

5.2. Saran .........................................................................................

35

DAFTAR PUSTAKA ......................................................................

.......................................................................................................... 36

LAMPIRAN ................................................................................... .

.......................................................................................................... 37

DAFTAR TABEL

TabelHalaman

1. KoefisienPengairan Dari PelampungPermukaan ............................. 15

2. HasilPengukuranPenampangSaluran ............................................... 26

3. Rata-Rata KecepatanPelampung/15 meter ...................................... 27

4. HasilPengukuran Debit .................................................................... 28

5. BangunanIrigasiBatangLampasi ...................................................... 32

DAFTAR GAMBAR

Gambar Halaman

1. PenampangSaluranTrapesium ........................................................... 21

2. PenampangMelintangSaluranIrigasi BKS 1-BKS 2 ......................... 28

DAFTAR LAMPIRAN

Lampiran Halaman

1. SkemaJaringanIrigasiBatangLampasi ............................................... 38

2. PelaksanaanPengukuran Debit ......................................................... 39

3. PetaLokasiDaerah IrigasiBatangLampasi ......................................... 40

4. PetaSituasiDaearahIrigasiBatangLampasi ........................................ 41

5. BendunganBatangLampasi ............................................................... 42