ZL-Conclusion

       Vast Mini Challenge 2: Like a Duck to Water

Background

Data Preparation

Methodology

Insight

Conclusion

From the discussion above, I conclude several points:

• Watershed integrity influence the water quality, the pollutant content from upstream will flow down to the downstream.

• Pollutant content is hard to decomposed by water, since during the flowing down to the downstream, the pollution level is still high.

• Scientist should pay more attention to the sampling site where has the measure level higher than the upper limit, especially in recent years.

• The possible reasons of the change of trend of each measure are:

1. Climatical cause may lead to the measure level drop down fast in one month or quarter.
2. If one or several measures sudden rise a lot in the same period, maybe there is a factory drain sewage into the water.