snow cave : 無料・フリー素材/写真
snow cave / USDAgov
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | U.S. Department of Agriculture’s (USDA) Natural Resource Conservation Service (NRCS) hydrologist Julie Koeberle digs a snow cave during a check on a snowpack telemetry site (SNOTEL). SNOTEL sites allow NRCS to predict the amount of spring and summer snowmelt in twelve Western states where 50 to 80 percent of all the water used comes from snowmelt. USDA NRCS snow surveyors check each site at least once a year to perform routine maintenance. |
| 撮影日 | 2007-01-10 14:54:34 |
| 撮影者 | USDAgov |
| タグ | |
| 撮影地 | |
| カメラ | C2100UZ , OLYMPUS OPTICAL CO.,LTD |
| 露出 | 0.003 sec (1/320) |
| 開放F値 | f/2.8 |