| 李志军,贾青,黄文峰,李长玉.水库淡水冰的晶体和气泡及密度特征分析[J].水利学报,2009,40(11): |
| 水库淡水冰的晶体和气泡及密度特征分析 |
| Characteristics of ice crystals air bubbles and densities of fresh ice in a reservoir |
| |
| DOI： |
| 中文关键词: 冰 观测 晶体 气泡 密度 |
| 英文关键词: ice measurements crystals bubbles density |
| 基金项目: |
|
| 摘要点击次数: 3653 |
| 全文下载次数: 436 |
| 中文摘要: |
| 对黑龙江红旗泡水库的淡水冰生消过程实施现场观测。分别在冰快速生长期、稳定生长期和融冰期取样，观测其冰晶体、冰内气泡形态及尺寸，并测试冰表观密度，获得了3个冰阶段冰样由表至底的冰晶类型、晶体等效直径、冰内气泡宏观形态、气泡尺寸及百分含量和冰密度。结果表明，冰上层为粒状晶体，中下层为柱状晶体，平均粒径随冰深度增加而增大，但冰晶体不随时间变化；冰生长时冰内上层气泡呈球体，百分含量较高，中下层呈圆柱体，百分含量较低；伴随冰的生长和消融，冰内气泡的尺寸和百分含量呈“变化”势态，而冰密度随冰内气泡百分含量的增加而降低。 |
| 英文摘要: |
| Some in situ observations of ice growth and decay processes were performed in the Hongqipao Reservoir, Heilongjiang Province. During the observation, three samplings were done in the stages of fast ice growth, steady ice growth and ice thaw. These three ice samples were used to observe ice crystals, air bubbles in ice and to measure ice density. The observation and measurement obtained the vertical profiles of the ice crystal types, ice crystal sizes, air bubble shapes, air bubble sizes and air bubble contents in percent age, as well as ice density from ice surface to bottom. The findings of this study are: the crystal in ice upper section of is granular, the other parts in ice is columnar, the average grain size increases with ice depth and keep the same in two ice growth stages. The shape of air bubbles in the upper section of ice is sphere with higher percentage, and the shape in the middle and lower sections is cylinder with lower percentage when ice grows. The air bubble size and percentage are active along with the ice freezing and melting stages; ice density decreases with the percentage of the air bubbles in ice increasing. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|