賢沼の水環境について

概要

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Kashikonuma pond, habitat of giant eels as a national natural monument had beenover-eutrophication. An internal circulation of the nutrient, algae production from the nutrientssupplied from the suspended solids and bottom sediments of the pond caused the water qualitydeterioration. Then, it was tried to pull out the pond bottom water including the nutrient and to decreasethe amount of diffusion by the circulation of it. At the result, the effect was able to be conﬁrmed at themicroorganism level like an increase in plankton's kind etc. the macro like the value etc. COD though itdid not appear in the numerical value the effect of pulling out of the marsh bottom water. The effect ofpulling out of the marsh bottom water was able to be conﬁrmed at the microorganism level like anincrease in plankton's kind and decrease the water bloom. A nutrient accumulative amount is too huge,and the effect of pulling out of the bottom water seem to be decreased COD of the pound. It is necessaryto exhaust mud For the water quality improvement of the pond. in the future. regional cooperation work torestore the environment is important.
福島工業高等専門学校の論文