Osnovna kola Bartola Kaia Vinkovci Erasmus project 2018
Osnovna škola Bartola Kašića Vinkovci Erasmus+ project 2018 -2020 W. A. T. E. R. – in other ways RAINWATER MEASUREMENT November, December 2019
Clean water is becoming scarce and water from public water supply system is also very expensive. It is a good idea to use rainwater. First we wanted to see how much money we could save if we used rainwater. Instead of buying a rain gauge (ombrometer), an instrument used to gather and measure the amount of liquid precipitation over an area in a predefined period of time, we decided to make one. Our team consisted of pupils from grades 6, 7 and 8. Our task was to measure the amount of rainfall during the period of 5 weeks, from 11 November till 16 December. Although there was heavy rainfall and there were storms in other parts of Croatia and neighbouring countries, we had only few rainy days, it was a quite dry period.
We used the book “Mali meteorolog” (“The little Meteorologist”), which we often use to make instruments for measuring weather conditions and do experiments.
Things we used - a plastic container - a measuring jug - a ruler - a small dish - a piece of marble stone - a tube of strong glue - a piece of board - a permanent marker
Procedure We made a hole in the bottom of the plastic bowl, put it on the top of the container previously marked to show the amount of liquid, glued the container to the stone, so that the wind cannot overturn it, wrote “KIŠOMJER” and left it behind the school, not near the building , trees or any other obstacles.
The diameter of the bowl used as a funnel is 120 millimeters, the area is 113, 04 square centimeters r 2π= 60 x 3, 14= 11304 mm 2 113, 04 cm 2 We have to multiply by 88, 464 to get the amount of rain per square meter, because 10000 cm 2 : 113. 04 = 88, 464
Ground plan of the school building
The total area of the school building, together with the gym is 3052 m 2 The total area of the school (buildings, park, playground and parking lot) is: 22000 m 2
We started on 11 November and checked the rain gauge every day at 1 p. m. (the most suitable time for everyone), because it is the time between shifts, pupils either finish lessons and go home or come to school.
The team consisted of 10 pupils. Those who live quite close to school were in charge of checking the gauge at weekends.
Our results show that we could have saved 736 EUR if we had collected rainwater from the roof of the school building and the gym during the period of five weeks.
DECEMBER NOVEMBER Value of DATE, day of the Month measured week water in ml Value of measured water in litres/m 2 Amount of rainwater in Price (EUR) the whole 1 m 3= 3, 47 area of EUR school in m 3 0 0 1, 526 5, 295 11, Monday 12, Tuesday 0 5, 7 0, 00 0, 50 20, Wednesday 50 4, 42 13, 489 46, 806 27, Wednesday 35 3, 10 9, 461 32, 829 49 74 212 128 4, 5 5, 7 127 15 18 60 3, 4 0 787, 3 4, 33 6, 55 18, 75 11, 32 0, 40 0, 50 11, 23 1, 32 1, 59 5, 31 0, 30 0, 00 69, 62 13, 215 19, 990 57, 225 34, 548 1, 220 1, 526 34, 273 4, 028 4, 852 16, 206 0, 915 0 212, 474 45, 856 69. 365 198. 570 119, 881 4, 233 4, 295 118, 927 13, 977 16, 836 56, 234 3, 175 0 736, 279 28, Thursday 29, Friday 30, Saturday 2, Monday 8, Sunday 9, Monday 10, Tuesday 12, Thursday 13, Friday 14, Saturday 15, Sunday 16, Monday TOTAL Table with rainy days only We must find a way to use rainwater and save an enormous amount of money that can be used for other purposes.
- Slides: 13