Effect of Outflow Water from Catchment Areas in Livestock Farming on Water Quality

Abstract

Recently, the river water quality has become a problem in the livestock farming areas and the actual state grasping is demanded. In this paper, the effect of outflow water from catchment areas in livestock farming on water quality were investigated in Aomori Prefecture. As a result, total nitrogen concentration was proportional to the grassland area ratio and increased and outflow rate of total nitrogen from the grassland was 3.3%.