Experimental Wetlands : 無料・フリー素材/写真
Experimental Wetlands / born1945
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | This part of the Jackson Bottom Wetlands Preserve were modified as an experiment. Using secondarily treated effluent from the Unified Sewerage Agency's (USA) Hillsboro Wastewater Treatment Plant, USA's researchers are investigating the use of wetlands to “Polish” the wastewater for removal of phosphorus and nitrogen. These nutrients are abundant in the effluent of conventional secondary treatment plants. This experimental program is part of USA“s comprehensive effort to reduce loads of phosphorus and nitrogen entering the water quality-limited Tualatin River. This area is not currently being used for "Polishing." The Sewer District (Clean Water Services) is currently doing a study to formulate a long-term plan for the management of the Wetlands. One of the items on the agenda is the use of the Jackson Bottom Wetlands for final treatment of waste water. The ultimate goal is to have the water entering the Tualatin river be as clean as possible. "Polishing" helps reach that goal. |
| 撮影日 | 2006-04-17 15:10:03 |
| 撮影者 | born1945 |
| タグ | |
| 撮影地 | |
| カメラ | DSC-P52 , SONY |
| 露出 | 0.004 sec (1/250) |
| 開放F値 | f/8.0 |