頁籤選單縮合
題 名 | 水庫優養化之時間數列分析研究=Time Series Analysis on the Trophic Status of Reservoir |
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作 者 | 陳鴻烈; 鄭慧玲; | 書刊名 | 水土保持學報 |
卷 期 | 30:4 1998.12[民87.12] |
頁 次 | 頁331-337 |
分類號 | 443.96 |
關鍵詞 | 優養指數; 相乘性分解方法; 時間數列分析; Trophic status index; Multiplicative decomposition method; Time Series analysis; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究將以德基水庫中總磷資料計算 TSI( Trophic Status Index )優養指數 , 並利用相乘性分解方法( multiplicative decomposition method )進行德基水庫水質 優養化時間數列分析研究,用以瞭解德基水庫水質之優養化變化情形。研究顯示,德基水庫 季節變化( S )之水質優養化變動情形每年有一高峰期,從四月到十月, 總長度達七個月 之久。此外,德基水庫優養指數長期趨勢( T )乃顯示隨時間( t )呈緩慢成長狀態,其 間的關係可表示為 T=51.4231+0.0605t, 其中 t=1,2,3,.....,161。 至於在循環變動( C )的研究中則發現,循環變動週期自早期的 2 ∼ 3 年,逐漸縮減至 1 年左右。 由此可知 ,德基水庫水質優養化的情形有日益嚴重的趨勢。 |
英文摘要 | The objective of this study reported herein is to maturate a practical procedure for the time series analysis of an eutrophication condition in reservoir. Application is made to the most important reservoir in the central part of Taiwan, Te-Chi. A multiplicative decomposition method as well as TSI (Trophic Status Index) has been adapted to determine the trophic variations including seasonal (S), circular (C), long-term (T) and irregular (I) changes. The results obtained indicate that (1) there is a long high peak for seven months from April to October yearly; (2) the long-term trend (T) increases with time (t) as following relationship: T=51.4231+0.0605t; and (3) circular change period decreases from two or three years to about one year. The methodology is feasible to present the eutrophication changes numerically. |
本系統中英文摘要資訊取自各篇刊載內容。