Urbanization influences on stream temperature behavior within low-discharge headwater streams
スポンサーリンク
概要
- 論文の詳細を見る
Urbanization has compromised water quality globally, especially stream temperature, by reducing shading and converting natural landscapes to impermeable surface coverage (ISC). We analyze stream-air temperature relationships in a low-order, moderate-gradient urban stream using three years of stream temperature data collected at nine monitoring sites. At the sub-catchment scale, ISC increases from 13.7% to 24.3% among sites, causing mean summer temperatures to increase 4–5°C or 0.37°C for each 1% increase in ISC. ISC at these spatial scales influences stream-air temperature relationships at daily-, weekly-, and monthly-averaged time scales. ISC at smaller spatial scales within a 25-m buffer of the stream, which ranges from 1% to 75%, does not correlate with mean stream temperatures at any temporal scale; however, buffer ISC does correlate with short-term temperature surge events, which we define as an increase of at least 1°C within 15 minutes. Mean surge amplitudes range from 1.90°C to 3.27°C in areas with low and high buffer ISC, respectively. Our results show that ISC influences stream temperatures at stream buffer and sub-catchment spatial scales and daily, weekly, and monthly temporal scales, and may render the concept of equilibrium temperature obsolete for predicting stream temperatures, especially in low-order, headwater streams.
論文 | ランダム
- ニワトリ胚天然アクチンフィラメントのトロポニン活性(生化学)
- ニワトリ胚線維芽細胞のmetabolic ageとdoubling potential
- 7.器官培養によるニワトリ胚小腸二糖類水解酵素ハイドロコルチゾンと基質による誘導(JOURNAL OF NUTRITIONAL SCIENCE AND VITAMINOLOGY Vol.23 No.3 : 掲載論文要旨)
- ニワトリ胚血清transferrinのdisc電気泳動による検討
- ニワトリ胚の性未分化生殖巣の微細構造