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020 Koliko kiše smo imali?

18/4/2020

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Miscellaneous items #020

Koliko kiše smo imali?

How much rain did we have?

How much rain is 50 litres per square metre (50 L/sq m)?


​
The posts on this site are not just about learning Croatian. Sometimes we might delve into culture, or botany or astronomy, or history, or philosophy, or chemistry, or sport, or even meteorology ….

On 25 May 2019, the newspaper Slobodna Dalmacija published an interesting article, in relation to Šibensko-Kninska županija (Šibenik-Knin county), with the following headline:
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Picture
Roughly translated ... "Severe weather in the county hinterland. Strong rain and hail hits the Drniš region. In one day, twice as much rain fell as the monthly average. Postponed final match of the county football cup also."

Wow! In late May!? And some details from the article:

“…….. u Drnišu je do 17 sati palo ekstremnih 185 litara kiše po kvadratnom metru. ……… Prema službenim podacima DHMZ-a, u Drnišu u svibnju prosječno padne 77,8 litara kiše po kvadratnom metru ….”

"........ In Drniš up until 5 pm an extraordinary 185 litres of rain fell per square metre. .... According to official data of the DHMZ, the average May rainfall in Drniš is 77.8 litres per square metre."

[DHMZ is Državni Hidrometeorološki Zavod: the State Hydrometerological Institute]

​
Obviously, they had a lot of rain that day in Drniš! But how much? I have no sense of how much rain is 185 litres per square metre.

What are these units of measurement litres per square metre? Is this the way that rainfall is measured right across Europe, or is this peculiar to Croatia?

In Australia, the unit of measurement of rainfall is millimetres (mm). For example, "Yesterday Perth received 50 mm of rain". Hmmm, what does that mean?

How does a measurement in one of these systems compare with a measurement in the other? I have no feel for how much rain fell that day in Drniš - 185 L/square metre.

If the same amount of rain fell in Perth, what reading would be reported (in mm), I wonder?
​
You may want to stop reading now! What follows is mathematics, and has no relationship to learning Croatian. But then again you might find it useful when you come to Croatia ...
​

Thinking aloud .......... I need to visualize what measurements in these two systems mean.

Let’s start with the Australian way. What is meant by a rainfall reading of 50 mm? Well, if we put any vertical-sided container (like a rain gauge) on the ground – no matter what area or shape is the bottom of the container - the rain collected in it would come up to a height of 50 mm.
​

Picture
Both containers (or any other container with vertical sides) fill with water up to a level of 50 mm.
​

And in the Croatian system, if we had a vertical-sided container, and the area of the bottom is 1 square metre, the reported rainfall is the volume of rain collected in that container.
​

Picture
If the volume of water is 50 L, the rainfall reading is reported as 50 L per square metre (50 litara po kvadratnom metru). It is a measure of the volume of rain that falls on each square metre of ground.
​

Cometh the reconciliation ……. [It’s not too late to turn back!]

Suppose that the vessel with a base of 1 m x 1 m received enough rain to fill with water up to a level of 50 mm.

In the Oz system, we would say that we have had 50 mm rainfall.

And the reading in the Croatian system of units? What is the volume of water collected?

Converting all measurements into centimetres, and knowing that 1 L = 1000 cubic centimetres ….
​

Picture
Wow! 50 mm rainfall is the same as 50 litara po kvadratnom metru!!!!!!!!
​
So I don’t have to do conversions between units at all. Bewdy!
​

Quiz 1:  The rainfall yesterday in Split was reported to be 103 litra po kvadratnom metru. What was the rainfall expressed in units of mm?
A.        301 mm
B.         Lots
C.         103 mm
D.        Who cares? Only Aussies would use such a system of measurement
E.         Infinity
F.         Zero

​
Quiz 2: What is a kišomjer?

I should change the name of this blog to Aha! Meteorolgy and mathematics.

Postscripts:

I have been a little loose in my language in this post by referring to “rainfall”, when it should be “precipitation” (oborina) – the total of rain, snow, hail, dew and frost (kiša, snijeg, tuča, rosa i mraz). This is because in Perth, esentially the only precipitation that happens is rain. What colour is snow? Is it solid, liquid or gas?

It seems that in Croatia “hail” can be referred to as grad, krupa or tuča. I suppose each of them predominantly in different regions?


​
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Getting around

You can browse or search this website in the following ways:
  • Use the drop-down menus from the buttons at the top of each page to browse page titles.
  • Click to go to the ROAD MAP (also from the drop-down menu under the NAVIGATION button).
  • Click to go to the ALPHABETICAL INDEX. (also from the drop-down menu under the NAVIGATION button).
  • Enter a word or phrase in the Search box at the top of each page.​​




AHA! Learning Croatian with Bob

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  • Home
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        • Photos 1-10
    • Contacts
  • MISCELLANEOUS
    • Posts 1 -15 >
      • 001 Kosa, koza, koža
      • 002 Pronouncing 'au'
      • 003 Can language influence behaviour?
      • 004 First day of the week
      • 005 Do Croatians assign gender to objects?
      • 006 Za četiri dana, na dva dana
      • 007 My brain becomes full!
      • 008 Sretan rođendan ti
      • 009 Na kavu, po kavu, za kavu?
      • 010 Until you don't do it
      • 011 Nazvati nekoga, telefonirati nekomu
      • 012 If she were a man ....
      • 013 Streets with two names?
      • 015 Tri, četiri, sad!
    • Posts 16-30 >
      • 016 I feel like crying!
      • 017 I felt like crying, I will feel like crying
      • 018 Picking up place names by ear
      • 019 Where did the "j" go?
      • 020 Koliko kiše smo imali?
      • 021 Požuri polako
      • 022 Mi, mi, mi, mi
      • 023 Why should we learn the grammar?
      • 024 Words for youngsters are neuter
    • EXPERIENCES >
      • EXPERIENCES: POSTS 1 - 15 HOME >
        • 001 Licitarska srca
        • 002 My Aussie accent
        • 003 The upside down SIM card
        • 004 Buying fritule in Split
        • 005 Jučer ili sutra?
        • 006 Što rade ućitelji?
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  • GRAMMAR
    • Posts 1 - 15 >
      • 001 Where are the pronouns?
      • 002 Padeži and noun endings
      • 003 Endings of pronouns and adjectives
      • 004 "u" ili "na" ?
      • 005 The declensions of Tko? and Što?
      • 006 Ja sam na Trgu bana Josipa Jelačića
      • 007 Going and coming: u-iz, but na-sa
      • 008 Sav - All, every
      • 009 Number of subjects and the verb 'biti'
      • 010 Koga nazoveš? Komu telefoniraš?
      • 011 Declension of place names
      • 012 Dati - dativ
      • 013 Verb endings: Who is the doer?
      • 014 Sibilarization and palatalization
      • 015 Iotation (jotacija)
    • Grammar: Posts 16-30 >
      • 016 Vodice su grad u Hrvatskoj
    • Grammar reference section >
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        • 001 Questions that define the case of nouns
        • 002 All nouns have gender
        • 003 Nouns in the nominative case
        • 004 Nouns: Declension categories
        • 004a A universal declension table?
        • 005 Declension of regular masculine nouns
        • 006 Declension of regular feminine nouns
        • 008 Masculine plural - infix or not?
      • VERBS >
        • 001 Transitive and intransitive verbs
        • 004 Conjugation types
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    • Posts 1 - 15 >
      • 001 Ne daj se!
      • 002 U tom grmu leži zec!
      • 003 Baš me briga!
      • 004 Mačji kašalj!
      • 005 Što je, tu je!
      • 006 Eto ti ga na!
      • 007 Na licu mjesta
      • 008 Sve si to ti kriv!
    • DAKLE, ŽELIŠ BITI KAO PRAVI HRVAT, JE L' DA? HOME >
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      • 003 Tako je!
      • 004 Izvoli! Izvolite!
      • 005 Eto!
  • VOCABULARY
    • POSTS 1 - 15 >
      • 001 Even dying is not easy!
      • 002 To laugh or to smile?
      • 003 Nahraniti, sahraniti .... schmahraniti
      • 004 Prefixes that modify verb meanings
      • 005 Prefixes on base verb stati
      • 006 Country names - noun or adjective?
      • 007 Names of towns: A grammatical nightmare
      • 008 Countries: What do we call their citizens?
      • 009 Baš
      • 010 What a joke! vic or šala?
      • 011 Čak
      • 012 Još or više? (More of something)
      • 013 Još or više? (Time-related)
    • FRAZEOLOGIJA - HOME >
      • Based on NOUNS >
        • 001 RUKA
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        • 001 UZIMATI/UZETI
    • VERB BUILDING: HOME >
      • 001 GOVORITI verbs
    • Vocab THEMES: HOME >
      • 001 In the time of coronavirus
    • Što je korijen riječi?: HOME >
      • 001 Nadimak
      • 002 Zora, prozor, zoran, ….
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        • 001 A girl and a bird
        • 002 His left foot
        • 003 A rebel
        • 004 Čuvarica Omiša
        • 005 Giorgio or Juraj?
        • 006 Tovar and friend
        • 007 Up on high
        • 008 On an island
        • 009 Water wonderland
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        • THE CITY >
          • 001 Zagreb cathedral
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          • 002 Interliber book fair
          • 004 On the tramvaj in Zagreb
          • 005 A night at the ballet
      • DALMACIJA: HOME >
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