Berhubung saat ini saya sedang ada hubungan dengan hydraulic stuffs and so on , maka, inilah dia link Hydraulic Engineering Manual (termasuk hidrologi ada di situ)…. check: link

Manual lainnya bisa dilihat di sini.

Surveying:

• Engineering and Design – Control and Topographic Surveying
• Engineering and Design – Hydrographic Surveying

Hydrology & Hydraulic:

• River Hydraulics
• Hydrologic Analysis of Interior Areas
• Hydrologic Frequency Analysis
• Flood Run-off Analysis
• Channel Stability Assessment for Flood Control Projects
• Hydrologic Engineering Requirements for Flood Damage Reduction Studies
• Hydrologic Engineering Requirements for Reservoirs
• Groundwater Hydrology
• Hydraulic Design of Flood Control Channels Change 1 ENG 4794-R
• Hydraulic Design of Reservoir Outlet Works
• Hydraulic Design of Spillways
• Hydraulic Design of Navigation Locks
• Hydraulic Design of Navigation Dams
• Hydraulic Design – Surges in Canals Change 1
• Hydraulic Design of Lock Culvert Valves

Hydropower:

• Hydropower
• Hydroelectric Power Plants Electrical Design
• Hydroelectric Power Plants Mechanical Design CH 1 (31 Jul 96)

Coastal Engineering:

• Coastal Engineering Manual – Part I
• Coastal Engineering Manual – Part II
• Coastal Engineering Manual – Part III
• Coastal Engineering Manual – Part IV
• Coastal Engineering Manual – Part V
• Coastal Engineering Manual – Part VI
• Coastal Engineering Manual – Appendix A – Glossary of Coastal Terminology

Dan masih buaaanyaaakkk lagi…. ada di TKP.

enjoy..!!

we can learn from anyone, anything, anytime, anywhere

this is great since i found it in an Elementary School in Tanjung, Tabalong, Kalimantan Selatan about 2 years ago (see the date). A small town, which was said as “in the middle of nowhere” by my friends, LOL.

Sure we’ll make great scientists & engineers (and of course, the other as well )…!! ummm…. to build a better world…a better place…optimistically speaking. why not? *wink*wink

But don’t forget: data, research, thinking, agreement, and all, will only (first) lead us to the “Relative Truth”. While there is only one source for the “Absolute Truth”.

questioning, is the beginning of knowing…

The picture is, simply beautifully interesting.

well, maybe you find it not that interesting like i do. Yea, indeed, we can create that kind of figure using water simulation software. I did that as well, but i don’t know why when i first saw this graph, i found that it’s beautiful. i felt simplicity and complexity in it. Not to mention about the governing equations. just to mention about the graph.

just like a life that i (maybe) missed. a simple and dynamic life.

#before continuum mechanics final exam#

“Sesungguhnya orang-orang yang beriman itu adalah orang-orang yang hanya beriman kepada Allah dan Rasul-Nya, kemudian mereka tidak ragu-ragu, dan mereka berjihad dengan harta dan jiwa mereka di jalan Allah. Mereka itulah orang-orang yang benar.” (QS al-Hujurât: 15)

you only have to believe, why bother

Sejak dulu si Bapak selalu me-wanti2 aku untuk bersahabat dengan yang namanya “nrimo” dan “prihatin”.

Jadi wanita jawa itu sing nrimo

begitu kata Bapak di suatu hari saat aku yang waktu itu masih kecil, sesekali mengeluh akan sebuah keadaan. Tak ada gunanya mengeluh kalau tidak melakukan sesuatu. Begitu, kata beliau kemudian. Nrimo… Sabar…

Prihatin ya nduk ya..

itu pesan berikutnya. Untuk prihatin, untuk kuat, tough dalam segala kondisi. Wanita jawa, yang “kesan umum”nya halus seperti tak ada kekuatan, tp sebenarnya dia tidak tak punya kekuatan. ia hanya lentur, lentur seperti baja. yang tak patah saat didera beban.

Then, the questions are, how tough is my heart? is it as tough as expected? how will i react when it’s broken into pieces? #disambung2in

#Bonus dialog:

tuutt….tuut….

“Hallo, assalamu’alaikum”

“waalaikumsalam”

“Pae, sek nopo pak?”

“ra nopo-nopo ki, mung nonton tivi”

“Pae, aku kangennn”

“Emange aku ora?”

That’s our dialogue when i really miss him. mau telpon, tapi bentar ya pak, saya beli pulsa dulu. ^^V

Shield Diagram

File pdf : Quiz 1. 2012_01_03

*posted as supporting graphics for open channel hydraulics

(03 January 2012)

So it is…

Start Point : Yogyakarta, Indonesia (AdiSutjipto International Airport), around 6.a.m in the morning

Adisutjipto International Airport - Yogyakarta - ID

transit : Makasar (i forget what time it was) ^^V

Sultan Hasanuddin International Airport (Makasar- ID)

[Before touch down], here is our beautiful Papua from up in the air. Btw, sorry for the ordinary camera ya…

Up in the air - Timika (Papua)

See the meander..?

another meander #there still many others, better take it with ur decent camera , come visit papua..!! ^^V

Okey, now we’re going to reach Sentani Airport (Papua- Indonesia)

Somewhere near Sentani

Still, around Sentani

Nice, isn't it...? ^_^

Finally : Touch Down…!! (Sentani Airport – Papua – Indonesia, around 2 or 3 p.m)

Sentani Airport (Papua - Indonesia)

Tips at Sentani Airport:

• there are many porters, who will insist you to have them take your luggage. If you had much money, of course it wont be a problem. well, i dont know how much they cost since i avoided them. ^_^
• Prepare you luggage. I mean, you should bring a “strong” luggage, since there ain’t any belt conveyor to bring your stuffs. They usually just throw it away. Well, it was in 2008. I’ll check out the updated information later on, ya..!! sumimasen.
• others…?? ummm… what do you think? wanna add up some more..?

#again, selingan bekerja

Beberapa cara menentukan hidrograf satuan (Unit Hydrograph) dari data terukur, diantaranya adalah dengan Metode Polinomial, dan Metode Collins. Tentu saja masih dengan mengingat asumsi & teori hidrograf satuan.

Ilustrasi (misalnya hujan efektifnya 3 jam):

ilustrasi hidrograf satuan (1)

atau:

ilustrasi hidrograf satuan (2)

Misalnya U1, U2, dan U3, adalah hidrograf yang terjadi akibat hujan yang di jam ke-1, ke-2, dan ke-3. Sedangkan HLL adalah hidrograf limpasan langsung (m3/s). Dan P1, P2, P3 adalah hujan pada jam ke-1, ke-2, ke-3. Maka HLL = U1 + U2 + U3.

Apabila Q(t) adalah debit (HLL) pada jam ke-t, dan q(t) adalah debit (hidrograf satuan) pada jam ke-t, maka, dalam gambar diatas,

Q(1) = q(1)*P1 —> q(1) = Q(1)/P1

Q(2) = q(2)*P1+q(1)*P2 —> q(2) = (Q2-q1*P2)/P1

Q(3)= q(3)*P1 + q(2)*P2 + q(1)*P3 —> q(3) = (Q1-q2*P2-q1*P3)/P1

dan seterusnya… (if you notice, index pada P dan q, berubah beraturan) ^^’

Btw, penentuan jumlah ordinat Hidrograf Satuan, bisa dihitung dengan : M-N+1, dengan M = ordinat HLL, dan N = jumlah hujan effektif.

1. Metode Polinomial

in several cases, ini yg paling mudah. tinggal aplikasikan saja rumus di atas, trus dihitung satu2 dengan cara substitusi. Inget matematika gih… ^^V

Q(1) = q(1)*P1 —> q(1) = Q(1)/P1

Q(2) = q(2)*P1+q(1)*P2 —> q(2) = (Q2-q1*P2)/P1

Q(3)= q(3)*P1 + q(2)*P2 + q(1)*P3 —> q(3) = (Q1-q2*P2-q1*P3)/P1

kalau diamati, yang jadi “penyebut” alias bilangan yg jadi pembagi selalu P1, and that makes it easier to generalized the formula. lihat contoh pada excel di akhir postingan.

2. Metode Collins

in several cases, ini yg paling enak. Prinsipnya sama dengan metode polinomial, cuma, mari kita kembali memanfaatkan kemudahan yang disediakan sama Mas Excel.

Theoretically, the steps are:

1. Siapkan data hidrograf limpasan langsung (sudah dikurangi base flow ya..) yang terpilih,
2. Ambil nilai sembarang untuk menerka nilai Hidrograf satuan (jumlah ordinat disesuaikan lho… dihitung dengan M-N+1 seperti di atas).
3. Hidrograf perkiraan kemudian dikoreksi supaya tinggi limpasan langsung (TLL) = 1 mm (namanya juga hidrograf satuan). TLL = VLL/A, dengan VLL = volume limpasan langsung, dan A = luas DAS. Satuan disamakan biar ketemu mm.
4. Hitung U1 dan U3 (debit yang terjadi akibat P1 dan P3). U2nya nggak usah dulu, karena kebetulan di sini P2-nya adalah maksimal. Waktu mulainya disesuaikan ya…
5. hitung U1+U2,
6. Hitung U2 = HLL – (U1+U2)
7. didapat hasil Hidrograf Satuan = U2/P2
8. bandingkan Hidrograf satuan perkiraan awal terkoreksi (dari point 3), apakah sudah mendekati atau belum? apabila belum mendekati, ulang prosedur dari awal, dengan memakai perkiraan yg lain, misalnya memakai rata2 dari hasil point (7) dan point (8).
9. Loop until eror < eror yg diinginkan.

Nah, kemudahan yang diberikan si Mas Excel adalah, automatic iteration.

• Check di excel option (Start/office button –> Excel Option), apakah “Iterative Calculation”nya sudah di -enable atau belum, see picture below. Maximum iteration dan tingkat ketelitiannya, silahkan disesuaikan keinginan. Makin teliti dan makin banyak iterasi, makin bagus, tapi ya lebih lemot

• kembali ke worksheet, blok pada range “D6:D11″ (range HS trial), kemudian ketik “=”, dan pilih range “M6:M11″ (kolom HS trial kedua).

• Sambil tekan “Ctrl+Shift”, tekan “Enter”. Biarkan Excel bekerja, tunggu hasilnya. Hohohoho…

Rangkaian dongeng di atas, diambil dengan asumsi perhitungan pada file Unit Hydrograf (terukur) terlampir. File itu yg metode Collins memang belum di iterasi. Monggo dicoba. Nanti hasilnya kurang lebih sama dengan yg polinomial di bawahnya.

Filed under: Belajar, Catatan Kuliah, Hydrology Tagged: Hydrology, Unit Hydrograph ]]> http://biasasadja.wordpress.com/2011/12/26/hidrograf-satuan-unit-hydrograph-dari-data-terukur/feed/ 1 -7.797224 110.368797 -7.797224 110.368797 footsteps il 2 ilustrasi excel hehe http://biasasadja.wordpress.com/2011/12/25/sing-ost-my-girl/ http://biasasadja.wordpress.com/2011/12/25/sing-ost-my-girl/#comments Sun, 25 Dec 2011 14:49:10 +0000 ida http://biasasadja.wordpress.com/?p=501 ]]> OST Korean Drama yg agak2 jadi sound track gitu…for certain reason…#bisabuatsenam…!!

Lyricnya, umm…  copas dari sini. Judulnya “Love Can Be Hard” katanya… hohohoho… gitu ya? #pura2bodo,jadibodobeneran

Eh iya, ada satu lagi :

yang kedua ini, judulnya “Mermaid love Shark” katanya… Hmm….judul yang judul…

English translation lyricsnya ada di salah satu comment dari sini, kyk gini:

you leave me without a word,
i knew nothing will hurt me

i really shocked and hurt because of your words,
sometimes i like to complain and bored with this love

i just want an ordinary love,but my heart just won’t accept it,
i hate to pretend but i just can’t stop it

you even already know that i just can’t be without you, its because of you

i didnt want to burden you,
i just want you to stay with me now,although i’m sad

i tried to said other things from you,
but i couldn’t help to said that i love you,
i wondered how your face would look like when you’re cried

i just want an ordinary love,but my heart just won’t accept it,
i hate to pretend but i just can’t stop it

you even already know that i just can’t be without you, its because of you

i didnt want to burden you,
i just want you to stay with me now

the words that said i loved you,its true my heart can’t accept it,
i hate to pretend but i just can’t stop it

you even already know that i just can’t be without you , its because of you
i didnt want to burden you,
i just want you to stay with me now,although i’m sad

Well, hampir semua OST Drama (dari manapun), liriknya memang agak2 lebay kan ya… atau memang begitu normalnya? mbuh yo…

#Selingan ngerjain tugas ^_^