Team presentation

1. Analyzing of
Shubuto
River
Rizky Putra Isna Kumala Sari
An-Sin Liu Rintaro Ishido

2. Results & Comparison data
Conclusion
Introduction
01
03
05
Methods
02
04 Ideas & Solution
Contents
2

3. 黑松內町 Kuromatsunai Town
Introduction
• Located in south of Hokkaido
• The name comes from the Ainu word
"Kur-mat-nay”
• Town rich in regional exchange
-Local Guide
• Nature -mountains, hills, rivers, and seas
3

4. Main activity
Introduction
4
Total Amount 153
Animal husbandry 112
(73%)
Tilling & sowing 41 (27%)
Data Resource ： https://reurl.cc/Qb7QDq

5. Main activity-1.Tilling & sowing
Introduction
4
1st
2nd
Data Resource ： https://reurl.cc/Qb7QDq

6. Main activity - 2.Animal husbandry
Introduction
4
1st
Data Resource ： https://reurl.cc/Qb7QDq

7. Shubuto River
Site 2 #3
upstream
0
1
02
0
4
03
Site 3 #10
middlestream
Site 4 #18
downstream
Site 1 #13
upstream
Introduction
5

8. 3
6

9. 7

11. Measuring
Step 2
Data Recording
Step 3
Collecting water
sample
Step 1
Observation
Step 4
Method
Water Sampling
8

12. site date of
measurements
Electrical
conductivity (micro
S/cm)
water temperature
(degree C)
pH general
bacteria
1st 2nd 1st 2nd 1st 2nd 1st 2nd
1 2022/07/28 106,0 108,2 22,7 22,9 7,76 7,73 7 8
2 2022/07/28 118,9 121,1 20,2 20,09 7,51 7,37 76 35
3 2022/07/28 117,2 118,6 22,5 22,3 7,9 7,89 12 25
4 2022/07/29 122,8 124,6 23,1 23,1 8,07 7,92 130 76
Results and Discussion
9

13. Results and Discussion
site date of
measurements
coliform bacteria nitrate (nitrate-N) phosphate
(phosphate-P)
silica
1st 2nd 1st 2nd 1st 2nd 1st 2nd
1 2022/07/28 2 1 0,5 0,5 0,02 0,02 20 20
2 2022/07/28 24 30 2 2 0,5 0,5 50 50
3 2022/07/28 13 14 0 0 0,02 0,02 20 20
4 2022/07/29 4 7 0 0 0,05 0,075 50 50
10

14. Results and Discussion
site date of
measurements
COD (mg/L) DO (mg/L) Turbidity (mg/L)
1st 2nd 1st 2nd 1st 2nd
1 2022/07/28 8 6 9,89 9,59 1,61 1,28
2 2022/07/28 4 4 10,4 9,09 1,56 1,64
3 2022/07/28 >=8 >=8 10,69 10,08 1,02 1,08
4 2022/07/29 2 2 9,27 9,81 2,30 2,22
11

15. Electrical Conductivity (EC)
The highest EC is
site 4 and site 2
These conductive ions come
from dissolved salts and
inorganic materials such as
alkalis, chlorides, sulfides
and carbonate compounds.
Higher amounts of these
impurities will lead to a
higher conductivity
Site 4 location,
Downstream near coastal
Area 12

16. Water Temperature
Highest
temperature on
site 4
● Downstream area
● rate of flow river is
Low
13

17. Temperature change
14
there is a trend of rising
temperature

18. pH Indicator
River site 4 is
more basic and
site 2 is more
acidic
Overall, the pH of river
water is still reasonable and
safe for the life of aquatic
biota
Site 4 location,
Downstream near coastal
Area 15

19. pH Indicator
16

20. General Bacteria
The most
common bacteria
found at site 4
This is possible because site
4 is a downstream area near
the sea where nutrients and
various other substances
that are carried by river
currents accumulate
17

21. Fecal ColiForm Bacteria
Site 2 is very high
The presence of fecal
coliform bacteria in aquatic
environments site 2
indicates that the water has
been contaminated with the
fecal material of humans or
other animals.
Site 2 location, Downstream with Urban Buildings
& Farm Activities 18

22. Fecal ColiForm Bacteria
Site 2 and 3
● The presence of fecal
coliforms in the waters
indicates that the
water is contaminated
by human or other
animal faeces.
● Interfarm waste water
release to river
● Agriculture and urban
areas
19

23. Nitrate-Nitrite
Site 2 is very high
Site 2 : Waste water release
from interfarm activities
Site 1 : Nitrate contained in
water sources from
chemical contamination
(urea fertilizer, ZA, etc.) in
the upstream part
20

24. Nitrate-Nitrite
Site 2 is always
the highest
21

25. Phosphate (phosphate-P)
Site 2 is very high
● Phosphate in water is
in the form of
orthophosphate
● Phosphate content in
waters comes from
runoff of fertilizers on
agriculture, manure
humans and animals,
and the farm industry
22

26. Silica (Si)
Almost no
difference on
each site
Silica is an element that is
useful to the organism
especially Diatoms
(Chrysophyta
Bacillariophyceae)
23

27. Chemical Oxygen Demand
Site 3 and 1 have
high
concentration
● Urban buildings and
Human activities
● Paddy field and
agricultural
24

28. Dissolved Oxygen
Highest
concentration on
site 3
● Upstream area to
midstream area
● Lowest temperature
than the others site
● lowered DO levels in
the early morning on
hot summer days
when stream flows are
low, water
temperatures are
high,
25

29. Turbidity
Highest turbidity
on site 4
● Downstream area near
sea
● Accumulation of
various kinds of
organic substances
from agricultural
activities, livestock,
and urban areas
26

30. Turbidity
Sites 2, 3, and 4
have higher
turbidity
this indicates the
accumulation of higher
concentrations of organic
and inorganic substances
27

31. We think the pollutant comes from the farm.
However…
If the source of the pollutants are
farm,
We cannot specify the source.
Ideas & Solution
28
Nonpoint source pollution !

32. Our proposal is measuring flow rate of river
(L/s)
Concentration (mg/L) × Flow rate (L/day)
= Amount of pollutants (mg/day)
3 kg/day
5kg/day
We can calculate how much
pollutants coming into river per day,
month or year.
3
kg/day
02
01
2
kg/day
We can calculate the amount of
load of pollutants to the river.
Ideas & Solution
29

33. This image cited from lesson slides
Thanks Neghishi sensei !!
We can find out which place of
Kuromatsunai pollutes the river
!!
Ideas & Solution
30

34. Conclusion
● Kuromatsunai is a town that full of nature scenery including
mountains, hills, rivers, and seas.
● Human Activity is significantly related to environmental
condition.
● Shubuto river water quality is affected by farm and agricultural
activities along the river basin area
● Our proposal to preserve the beautiful river is measuring flow
rate of the river and monitoring the load of pollutants
31

35. Thank you for your attention

36. Land use