Abstract
In recent years, Lake Inawashiro slightly acidic lake with lake area fourth in Japan, came to neutralize is attention, investigation by various agencies have been made, but our research group in 2009 4 We have been continuing research from the moon.Already, we have been reporting their findings several times, each time to sort the results from the obtained from continuing observation of about four years during this time again, we refer to future measures and personnel of neutralization.
Point higher DOC EC and many rivers in Hubei section, DOC is high in Ogurogawa and Takahashi River in particular, the effects of Hubei inflow from rivers with high load is heavy throughout the year. In Nagasegawa of acidic river, water quality variation is small in the cold Hou period, have a lot of ups and downs in the warm period Hou much water intake is a flow largest river. In addition, stagnation and be eliminated also rivers that are usually stagnant when lake level is low, river situation is strongly dependent on the water level of Lake Inawashiro.Considering from the main dissolved component of water quality composition, little variation in general is cation shows a similar nature in the region. On the other hand, the variation is large anion, nature is very different and what part is in the northern part of the catchment area in particular.Concentration is different, but the composition of the lake water, are very similar to Nagasegawa, how to form a lake of acidic water from Nagasegawa is diluted became clear.
