A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is
ENVIRONMENTAL SYSTEMS RESEARCH
Lake Izunuma is a famous place for the coming of migrating flying swans. But, the leftovers of foods which were fed to the waterbirds and their droppings are one of the causes of water pollution. In order to prevent water pollution of Lake Izunuma, a feeding pond was constructed near the lake. Last winter, a total number of about 160,000 waterbirds entered into this pond and a build-up of pollutants of 12kg T-N, 1.5kg T-P and 120kg COD were found. This means that the pollutants going to Lakedoi:10.2208/proer1988.20.386 fatcat:qgarrqwuuncwjkn2c5gvdzo4ci