Chemical and Biological Investigations of the Water of River Tama. (Part I)

Abstract

The chemical and biological observations have been carried out by us at the several stations of the River of Tama since October 1932. Water temperture, hydrogen ion concentration, free carbon dioxide, oxygen content and hardness of the water were determined at the spot of the observations and the chemical analysis on the amount of chlorine, silicate, phosphate, nitrite, nitrate and soluble organic matter being contained in the water were made quantitatively at the laboratory of the Central Meteorological Observatory.
In this primary report the vertical and hourly fluctuations of these chemical components due to the invasion of the sea water were examined at the both stations of Rokugo-basi (7 meters in the maximum depth) and Yaguti (4m.). The discontenuous layers on the contents of O₂, Cl and SiO₂ were observed remarkably. The ratios in the mixtures of river^-, sea-and rain-waters were calculated at the respective layer.