水質時系列의 週期性 分析

• 영문명: Periodicity Analysis of Water Quality at Guii
• 발행기관: 한국환경보건학회
• 저자명: 安鈴美(Ryong Me Ahn)
• 간행물 정보: 『1. 한국환경보건학회지』제14권 제1호, 39~45쪽, 전체 7쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 1988.04.30

영문 초록

The stochastic variations were analyzed periodicity by autocorrelation, variance spectrum and Fourier series. These time series included hourly and hourly mean observations on DO, water temperature and air temperature which measured by automatic recording instrument at Guii from 1, Jan., 1986 to 23, Feb., 1986. The results of study were as follows: l. Autocorrelation coef. (lag time 120) DO(ρ₁= 0.9705), WT(ρ₁1 = 0.9890), and AT(ρ₁ = 0.9874) were deeply related. DO and AT clearly showedr 24-hour periodicities while WT showed 23-26 hour periodicity. 2. Spectral density showed high at 24 hour in eech item and all of them showed weak peak at 12 hour. 3. The explained variance, which was a measure of the contribution of periodic function to the original time series, varied high 90.8 - 94.7%. This results showed that water qualities at Guii were affected deterministic components.

목차

Ⅰ. 緒論

Ⅱ. 調査對象 및 調査期間

Ⅲ. 結果 및 考察

Ⅳ. 結論