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題 名 | 關刀溪森林集水區降水及溪水水化學=The Water Chemistry of Precipitation and Streamwater at Guandaushi Forest Watershed |
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作 者 | 劉瓊霦; 許博行; | 書刊名 | 國立中興大學實驗林研究彙刊 |
卷 期 | 20:2 1998.09[民87.09] |
頁 次 | 頁71-78 |
分類號 | 436.19 |
關鍵詞 | 降水; 溪流水; 水化學; Precipitation; Streamwater; Water chemistry; |
語 文 | 中文(Chinese) |
中文摘要 | 本試驗於關刀溪水源地集水區量水堰上方長約400公尺的天然河床設置上、中及下 游 3 處取樣點,取樣觀測溪水化學在上、中及下游的空間變異。 1995 年 7 月到 1997 年 6 月收集及分析後的資料顯示, 溪流水 3 處取樣點的所有可溶性離子濃度與林外雨比較, 皆有相當程度的改變, 溪水的 pH 和林外雨比較之下,由林外雨的 4.15 提高到上游 6.30 、中游 6.40 及下游的 6.47;而溪水的總離子強度約為林外雨的 3.5 倍。離子當量濃度在 林外雨以 H 為最高,但在溪流水中,則以 Ca、SO �略� HCO �偶�高。無機養分離子的輸入 - 輸出方面,顯示溪流水輸出大量的養分,尤其是 HCO �陛BSO �� - S、Ca、Na 及 Mg。此 森林生態系無機氮 (含 NH �� -N 及 NO �� -N) 年總輸入為 9.47kg/ha/yr, 總輸出為 6.23 kg/ha/yr,此差異顯示此森林生態系中保留了部分的無機氮。 |
英文摘要 | The water chemistry of precipitation and streamwater at Guandaushi forest watershed in central Taiwan have been studied. The streamwater samples were collected at 400 m intervals from the stream source to the watershed outlet during July 1995 to June 1997. All ions changed in solute concentrations along the stream. Samples collected in streamwater had a rapid increase in pH comparing to that of precipitation. The ionic strength in streamwater exceeds in precipitation by a factor of 3.5. The ionic composition was dominated by H in precipitation, however, instreamwater was dominated by Ca, SO �� and HCO ��. The watershed budgest showed significant losses of HCO ��,SO �� -S, Ca, Mg, and Na. The annual inputs of NH �� -N and NO �� -N were 9.47 kg/ha/yr in Guandaushi forest watershed, the annual outputs were 6.23 kg/ha/yr. Hence, nitrogen was conserved in this ecosystem. |
本系統中英文摘要資訊取自各篇刊載內容。